SchoolDD.com provides concise explanations of trigonometric concepts like sine, cosine, and tangent functions. It explains how to use trigonometric functions to solve problems involving right triangles, with examples calculating values for angles like 30°, 60°, 37°, and 53° degrees. The site also summarizes trigonometric identity formulas and relationships between sine, cosine, and tangent for various angles.
The document summarizes concepts related to forces and motion. It defines key terms like work, kinetic energy, and potential energy. It provides formulas for calculating work, kinetic energy, and gravitational potential energy. Examples are given to demonstrate applying the concepts and formulas to solve physics problems involving changes in kinetic and potential energy.
This document discusses various topics relating to electromagnetic waves and radio communication technologies:
1. It describes the properties and characteristics of electromagnetic waves, including wavelength, frequency, and speed.
2. It explains different modulation techniques used in radio such as amplitude modulation (AM) and frequency modulation (FM). AM varies the amplitude of the carrier wave while FM varies the frequency.
3. It provides an overview of the electromagnetic spectrum, showing the range of wavelengths and frequencies used for communications technologies like radio and television broadcasting.
The document provides tips and information about radioactive decay and half-life calculations in 3 sections. It defines key concepts like activity, half-life, and decay equations. Examples are given for common radioisotopes like Co-60 and I-131. Steps are outlined for calculations involving initial activity, remaining activity, and decay over time. Nuclear reactions and mass-energy equivalents are also briefly discussed.
SchoolDD.com provides concise explanations of trigonometric concepts like sine, cosine, and tangent functions. It explains how to use trigonometric functions to solve problems involving right triangles, with examples calculating values for angles like 30°, 60°, 37°, and 53° degrees. The site also summarizes trigonometric identity formulas and relationships between sine, cosine, and tangent for various angles.
1. The document provides definitions and formulas for key kinematic concepts including displacement, velocity, average velocity, and acceleration.
2. Examples are given to demonstrate the calculation of displacement, velocity, average velocity, and acceleration using kinematic formulas and given values.
3. Word problems are worked through step-by-step to apply kinematic concepts and formulas to real-world scenarios.
1. The document discusses weeding and withdrawing materials from a library collection. It describes several factors to consider when deciding what to remove, such as outdated content, unused items, and materials in poor physical condition.
2. Guidelines are provided for how to evaluate items for withdrawal, such as checking circulation records and considering the accuracy and authority of the content. A multi-step weeding process is outlined that involves reviewing sections of the collection.
3. Reasons for regularly weeding a library collection include making room for new materials, shifting collections to better suit user needs, and removing outdated information.
This document discusses electric current and concepts related to electricity. It contains the following key points:
1. Electric current is the flow of electric charge in a conductor. The direction of the flow is from higher electric potential to lower electric potential.
2. The factors that affect the magnitude of electric current include the amount of charge passing through a point in the conductor per unit time, and the resistance of the conductor.
3. Kirchhoff's laws relate the current and potential difference in different parts of an electric circuit.
1) The document summarizes a study on family businesses in Thailand. It analyzed 129 family businesses in 2545-2546 and 165 businesses in 2550 using quantitative and qualitative methods.
2) A family business model is proposed that examines the interactions between the family, ownership, and business axes over time. It identifies four common types of Thai family businesses.
3) Key success factors for family businesses are discussed, including corporate vision, high performance, team building, managerial skills, innovation, and personal attributes of family members.
The document summarizes concepts related to forces and motion. It defines key terms like work, kinetic energy, and potential energy. It provides formulas for calculating work, kinetic energy, and gravitational potential energy. Examples are given to demonstrate applying the concepts and formulas to solve physics problems involving changes in kinetic and potential energy.
This document discusses various topics relating to electromagnetic waves and radio communication technologies:
1. It describes the properties and characteristics of electromagnetic waves, including wavelength, frequency, and speed.
2. It explains different modulation techniques used in radio such as amplitude modulation (AM) and frequency modulation (FM). AM varies the amplitude of the carrier wave while FM varies the frequency.
3. It provides an overview of the electromagnetic spectrum, showing the range of wavelengths and frequencies used for communications technologies like radio and television broadcasting.
The document provides tips and information about radioactive decay and half-life calculations in 3 sections. It defines key concepts like activity, half-life, and decay equations. Examples are given for common radioisotopes like Co-60 and I-131. Steps are outlined for calculations involving initial activity, remaining activity, and decay over time. Nuclear reactions and mass-energy equivalents are also briefly discussed.
SchoolDD.com provides concise explanations of trigonometric concepts like sine, cosine, and tangent functions. It explains how to use trigonometric functions to solve problems involving right triangles, with examples calculating values for angles like 30°, 60°, 37°, and 53° degrees. The site also summarizes trigonometric identity formulas and relationships between sine, cosine, and tangent for various angles.
1. The document provides definitions and formulas for key kinematic concepts including displacement, velocity, average velocity, and acceleration.
2. Examples are given to demonstrate the calculation of displacement, velocity, average velocity, and acceleration using kinematic formulas and given values.
3. Word problems are worked through step-by-step to apply kinematic concepts and formulas to real-world scenarios.
1. The document discusses weeding and withdrawing materials from a library collection. It describes several factors to consider when deciding what to remove, such as outdated content, unused items, and materials in poor physical condition.
2. Guidelines are provided for how to evaluate items for withdrawal, such as checking circulation records and considering the accuracy and authority of the content. A multi-step weeding process is outlined that involves reviewing sections of the collection.
3. Reasons for regularly weeding a library collection include making room for new materials, shifting collections to better suit user needs, and removing outdated information.
This document discusses electric current and concepts related to electricity. It contains the following key points:
1. Electric current is the flow of electric charge in a conductor. The direction of the flow is from higher electric potential to lower electric potential.
2. The factors that affect the magnitude of electric current include the amount of charge passing through a point in the conductor per unit time, and the resistance of the conductor.
3. Kirchhoff's laws relate the current and potential difference in different parts of an electric circuit.
1) The document summarizes a study on family businesses in Thailand. It analyzed 129 family businesses in 2545-2546 and 165 businesses in 2550 using quantitative and qualitative methods.
2) A family business model is proposed that examines the interactions between the family, ownership, and business axes over time. It identifies four common types of Thai family businesses.
3) Key success factors for family businesses are discussed, including corporate vision, high performance, team building, managerial skills, innovation, and personal attributes of family members.
1. The document discusses the principles of refraction of light through spherical lenses and thin lenses. It defines terms such as focal length, focal point, radius of curvature, and refractive index.
2. Formulas are provided relating refractive index, angles of incidence and refraction, and focal lengths for different lens materials.
3. Worked examples apply the formulas to calculate focal lengths, refractive indices, angles of refraction and incidence, and image distances for various lens configurations and materials.
This document provides a concise summary of key scientific concepts and formulas in fewer than 3 sentences. It begins by defining common scientific units used to measure length, mass, time, electric current, temperature, amount of substance, and luminous intensity. It then explains the International System of Prefixes used to modify unit symbols and provides examples of their use. The document proceeds to demonstrate the application of scientific concepts and formulas to solve problems involving length, area, volume, speed, time period, percentage error, and other topics. Diagrams are included to illustrate geometric and trigonometric relationships. Key formulas from algebra, trigonometry, logarithms, and other areas are also summarized concisely.
1. Electric fields are produced by electric charges and can be calculated using Coulomb's law. Positive charges produce outward electric fields while negative charges produce inward electric fields.
2. The electric field strength is directly proportional to the magnitude of the charge producing the field and inversely proportional to the distance from that charge.
3. Electric potential difference is equal to the work done moving a test charge between two points in an electric field, and is calculated by multiplying the charge by the potential.
This document discusses concepts in mechanics including:
1. Conditions for static equilibrium, including that the net force and net torque must equal zero.
2. Analysis of forces in different mechanical systems using free body diagrams and applying Newton's laws and principles of torque.
3. Problem solving techniques for calculating unknown forces, torques or accelerations given force diagrams and relevant equations of motion.
This document discusses rubber and the rubber production process. It mentions key ingredients used to make rubber such as carbon black, zinc oxide, sulfur, and additives. It also discusses the vulcanization process where sulfur is added to create cross-linking between polymer chains, and how this process strengthens the rubber and improves its elasticity and durability. The document provides contact information for an organization that may be able to provide more details on rubber production and properties.
1. Institutional repositories provide a marketplace for knowledge by capturing, disseminating, and preserving the research output of an institution. They help promote open access to information.
2. Setting up and managing an institutional repository involves activities like system evaluation, formulating policies, recruiting content, and providing reference assistance to users. Librarians play an important role in these activities.
3. As institutional repositories become more popular, the roles of librarians are changing. They now engage more in advocacy, education, advisory work, and training related to open access, self-archiving, and using institutional repositories.
The document summarizes the impacts of climate variability on Thailand in 3 sentences: Climate variability affects Thailand's agriculture and economy. Changes in temperature and rainfall patterns impact crop yields and damage from droughts and floods has increased economic losses. Understanding climate patterns like the Arctic oscillation and Jet Stream can help Thailand prepare for and adapt to climate impacts.
The document summarizes key concepts about electricity and electrical circuits. It discusses:
1) Direct current (DC) and alternating current (AC), explaining the difference between constant and varying current over time.
2) Transformers, describing how they work by electromagnetic induction to change voltage and current levels while transmitting power.
3) Circuit parameters like voltage, current, resistance and power in AC circuits. Formulas are given relating peak, RMS and average values.
4) Waveforms of voltage, current and power over time in an AC circuit, showing their sinusoidal variation and phase relationship.
In 3 sentences or less, the document provides an overview of basic electrical concepts like different current types, transformer
1. The document discusses projectile motion and provides equations to calculate the time, height, horizontal displacement, and velocity of a projectile over time given the initial velocity and angle of launch.
2. Formulas are derived for calculating time, maximum height, and horizontal displacement of a projectile based on the initial velocity components along x and y axes.
3. Examples are provided to demonstrate how to apply the equations to different launch angles like 45 degrees, 60 degrees, and 30 degrees.
This document summarizes population statistics from a village in Vietnam. It states that the village has around 70,000 residents, most of whom belong to the Kinh ethnic group. It provides demographic information such as the number of residents by age group and gender. For example, it notes there are around 15,000 residents who are 15 years old and 7,200 who are between 20-24 years old. It also lists the number of households in the village and other key population details.
The document summarizes the influenza pandemic of 2009. It states that the first cases were reported in Mexico in March 2009 and spread globally over the next year. By January 2010, over 214 countries had reported laboratory-confirmed cases of pandemic influenza H1N1 2009 infection. The World Health Organization declared a phase 6 pandemic based on the spread of the virus. The document lists some key facts about the 2009 pandemic.
The document is about simple harmonic motion (SHM). It contains 3 main points:
1) It defines SHM and gives the equation y=A sin(ωt) to describe the motion, where A is the amplitude, ω is the angular frequency, and t is time.
2) It explains how to graph SHM by plotting the position y versus time t over one period T. The motion is periodic, repeating every period T.
3) It relates the period T of SHM to the angular frequency ω via the equation T=2π/ω. The period is the time taken for one complete oscillation.
This document discusses concepts related to mechanics and materials science. It contains 13 sections that cover the following key points:
1. Definitions of stress and strain, and the relationship between stress, strain, and Young's modulus in Hooke's law.
2. Examples calculating stress, strain, and Young's modulus for objects under loads using the relevant formulas.
3. A graph showing the linear relationship between stress and strain for an elastic material according to Hooke's law.
The document provides relevant formulas, worked examples, and a graph to summarize the essential relationships between stress, strain and elastic modulus.
1. The document discusses concepts related to optics such as reflection, refraction, and lenses. It defines terms like focal length and radius and shows equations relating these concepts.
2. Diagrams and equations are provided to demonstrate the relationships between an object's position, image position, and lens or mirror curvature during reflection and refraction. Reflection and refraction rules are explained.
3. Lensmaker's equation and other formulas are given to calculate focal length based on the radius of the lens and the refractive indices of the lens and surrounding media. The behavior of light rays through spherical lenses is analyzed.
GSMI Social Media Strategies Summit Closing KeynoteChris Silva
The document discusses approaches for social media strategies. It recommends starting with three key objectives: learning about customers through social listening, engaging in dialogue through social channels, and advocating for the brand by recruiting unpaid supporters. It provides best practices for each objective, such as using free monitoring tools to learn, responding to existing discussions to dialogue, and cultivating ongoing influencer relationships to advocate. The document also stresses the importance of having the right internal structure like a hub-and-spoke model and social media mindset to scale beyond reactive efforts.
1. The document is a tutorial on scientific notation from the website www.schoolDD.com.
2. It explains scientific notation and provides examples for converting numbers between standard form and scientific notation.
3. Key concepts covered include the meaning of prefixes like milli, mega, and kilo, as well as how to perform calculations using numbers in scientific notation.
This document provides information about physics concepts including force, mass, weight, vectors, trigonometry functions, and angle identities. It defines force, mass, and weight, and gives the equations for calculating weight using mass and gravitational acceleration. It also explains vector addition and subtraction, and how to use trigonometry functions like sine, cosine, and tangent to solve problems involving angles. Several example problems are provided to demonstrate applying these concepts.
1. Democritus proposed that all matter is composed of tiny indivisible particles called atoms.
2. He described atoms as solid, indestructible, and existing in empty space. Atoms come in an infinite number of shapes and sizes and cluster together to form the objects we see.
3. The atomic model was later expanded upon by scientists like J.J. Thomson who discovered the electron and proposed that atoms have a small, dense positively charged center surrounded by even smaller, negatively charged electrons.
The document describes an exercise routine consisting of 3 sets of 15 repetitions each of various exercises. The exercises include squats, pushups, situps, and a 1/4 mile run. Rest periods of 1-2 minutes are recommended between sets. Completing the full routine takes around 30 minutes.
1. The document outlines a 5-part framework with objectives and actions for each part.
2. Part 1 focuses on education and training programs. Part 2 addresses infrastructure and technology. Part 3 covers policies and procedures.
3. Part 4 involves communication and collaboration, while Part 5 emphasizes measurement and evaluation of outcomes. The framework provides a comprehensive approach to an unknown topic.
1. Photosynthesis is the process by which plants, algae, and some bacteria use sunlight, carbon dioxide, and water to produce oxygen and energy in the form of glucose.
2. The general equation for photosynthesis is: carbon dioxide + water + energy (sunlight) → glucose + oxygen.
3. Environmental factors like temperature, light intensity, and carbon dioxide levels can affect the rate of photosynthesis, with optimal conditions usually between 14-18°C, 30-40% relative humidity, and 12-16 hours of sunlight per day.
1. The document discusses the principles of refraction of light through spherical lenses and thin lenses. It defines terms such as focal length, focal point, radius of curvature, and refractive index.
2. Formulas are provided relating refractive index, angles of incidence and refraction, and focal lengths for different lens materials.
3. Worked examples apply the formulas to calculate focal lengths, refractive indices, angles of refraction and incidence, and image distances for various lens configurations and materials.
This document provides a concise summary of key scientific concepts and formulas in fewer than 3 sentences. It begins by defining common scientific units used to measure length, mass, time, electric current, temperature, amount of substance, and luminous intensity. It then explains the International System of Prefixes used to modify unit symbols and provides examples of their use. The document proceeds to demonstrate the application of scientific concepts and formulas to solve problems involving length, area, volume, speed, time period, percentage error, and other topics. Diagrams are included to illustrate geometric and trigonometric relationships. Key formulas from algebra, trigonometry, logarithms, and other areas are also summarized concisely.
1. Electric fields are produced by electric charges and can be calculated using Coulomb's law. Positive charges produce outward electric fields while negative charges produce inward electric fields.
2. The electric field strength is directly proportional to the magnitude of the charge producing the field and inversely proportional to the distance from that charge.
3. Electric potential difference is equal to the work done moving a test charge between two points in an electric field, and is calculated by multiplying the charge by the potential.
This document discusses concepts in mechanics including:
1. Conditions for static equilibrium, including that the net force and net torque must equal zero.
2. Analysis of forces in different mechanical systems using free body diagrams and applying Newton's laws and principles of torque.
3. Problem solving techniques for calculating unknown forces, torques or accelerations given force diagrams and relevant equations of motion.
This document discusses rubber and the rubber production process. It mentions key ingredients used to make rubber such as carbon black, zinc oxide, sulfur, and additives. It also discusses the vulcanization process where sulfur is added to create cross-linking between polymer chains, and how this process strengthens the rubber and improves its elasticity and durability. The document provides contact information for an organization that may be able to provide more details on rubber production and properties.
1. Institutional repositories provide a marketplace for knowledge by capturing, disseminating, and preserving the research output of an institution. They help promote open access to information.
2. Setting up and managing an institutional repository involves activities like system evaluation, formulating policies, recruiting content, and providing reference assistance to users. Librarians play an important role in these activities.
3. As institutional repositories become more popular, the roles of librarians are changing. They now engage more in advocacy, education, advisory work, and training related to open access, self-archiving, and using institutional repositories.
The document summarizes the impacts of climate variability on Thailand in 3 sentences: Climate variability affects Thailand's agriculture and economy. Changes in temperature and rainfall patterns impact crop yields and damage from droughts and floods has increased economic losses. Understanding climate patterns like the Arctic oscillation and Jet Stream can help Thailand prepare for and adapt to climate impacts.
The document summarizes key concepts about electricity and electrical circuits. It discusses:
1) Direct current (DC) and alternating current (AC), explaining the difference between constant and varying current over time.
2) Transformers, describing how they work by electromagnetic induction to change voltage and current levels while transmitting power.
3) Circuit parameters like voltage, current, resistance and power in AC circuits. Formulas are given relating peak, RMS and average values.
4) Waveforms of voltage, current and power over time in an AC circuit, showing their sinusoidal variation and phase relationship.
In 3 sentences or less, the document provides an overview of basic electrical concepts like different current types, transformer
1. The document discusses projectile motion and provides equations to calculate the time, height, horizontal displacement, and velocity of a projectile over time given the initial velocity and angle of launch.
2. Formulas are derived for calculating time, maximum height, and horizontal displacement of a projectile based on the initial velocity components along x and y axes.
3. Examples are provided to demonstrate how to apply the equations to different launch angles like 45 degrees, 60 degrees, and 30 degrees.
This document summarizes population statistics from a village in Vietnam. It states that the village has around 70,000 residents, most of whom belong to the Kinh ethnic group. It provides demographic information such as the number of residents by age group and gender. For example, it notes there are around 15,000 residents who are 15 years old and 7,200 who are between 20-24 years old. It also lists the number of households in the village and other key population details.
The document summarizes the influenza pandemic of 2009. It states that the first cases were reported in Mexico in March 2009 and spread globally over the next year. By January 2010, over 214 countries had reported laboratory-confirmed cases of pandemic influenza H1N1 2009 infection. The World Health Organization declared a phase 6 pandemic based on the spread of the virus. The document lists some key facts about the 2009 pandemic.
The document is about simple harmonic motion (SHM). It contains 3 main points:
1) It defines SHM and gives the equation y=A sin(ωt) to describe the motion, where A is the amplitude, ω is the angular frequency, and t is time.
2) It explains how to graph SHM by plotting the position y versus time t over one period T. The motion is periodic, repeating every period T.
3) It relates the period T of SHM to the angular frequency ω via the equation T=2π/ω. The period is the time taken for one complete oscillation.
This document discusses concepts related to mechanics and materials science. It contains 13 sections that cover the following key points:
1. Definitions of stress and strain, and the relationship between stress, strain, and Young's modulus in Hooke's law.
2. Examples calculating stress, strain, and Young's modulus for objects under loads using the relevant formulas.
3. A graph showing the linear relationship between stress and strain for an elastic material according to Hooke's law.
The document provides relevant formulas, worked examples, and a graph to summarize the essential relationships between stress, strain and elastic modulus.
1. The document discusses concepts related to optics such as reflection, refraction, and lenses. It defines terms like focal length and radius and shows equations relating these concepts.
2. Diagrams and equations are provided to demonstrate the relationships between an object's position, image position, and lens or mirror curvature during reflection and refraction. Reflection and refraction rules are explained.
3. Lensmaker's equation and other formulas are given to calculate focal length based on the radius of the lens and the refractive indices of the lens and surrounding media. The behavior of light rays through spherical lenses is analyzed.
GSMI Social Media Strategies Summit Closing KeynoteChris Silva
The document discusses approaches for social media strategies. It recommends starting with three key objectives: learning about customers through social listening, engaging in dialogue through social channels, and advocating for the brand by recruiting unpaid supporters. It provides best practices for each objective, such as using free monitoring tools to learn, responding to existing discussions to dialogue, and cultivating ongoing influencer relationships to advocate. The document also stresses the importance of having the right internal structure like a hub-and-spoke model and social media mindset to scale beyond reactive efforts.
1. The document is a tutorial on scientific notation from the website www.schoolDD.com.
2. It explains scientific notation and provides examples for converting numbers between standard form and scientific notation.
3. Key concepts covered include the meaning of prefixes like milli, mega, and kilo, as well as how to perform calculations using numbers in scientific notation.
This document provides information about physics concepts including force, mass, weight, vectors, trigonometry functions, and angle identities. It defines force, mass, and weight, and gives the equations for calculating weight using mass and gravitational acceleration. It also explains vector addition and subtraction, and how to use trigonometry functions like sine, cosine, and tangent to solve problems involving angles. Several example problems are provided to demonstrate applying these concepts.
1. Democritus proposed that all matter is composed of tiny indivisible particles called atoms.
2. He described atoms as solid, indestructible, and existing in empty space. Atoms come in an infinite number of shapes and sizes and cluster together to form the objects we see.
3. The atomic model was later expanded upon by scientists like J.J. Thomson who discovered the electron and proposed that atoms have a small, dense positively charged center surrounded by even smaller, negatively charged electrons.
The document describes an exercise routine consisting of 3 sets of 15 repetitions each of various exercises. The exercises include squats, pushups, situps, and a 1/4 mile run. Rest periods of 1-2 minutes are recommended between sets. Completing the full routine takes around 30 minutes.
1. The document outlines a 5-part framework with objectives and actions for each part.
2. Part 1 focuses on education and training programs. Part 2 addresses infrastructure and technology. Part 3 covers policies and procedures.
3. Part 4 involves communication and collaboration, while Part 5 emphasizes measurement and evaluation of outcomes. The framework provides a comprehensive approach to an unknown topic.
1. Photosynthesis is the process by which plants, algae, and some bacteria use sunlight, carbon dioxide, and water to produce oxygen and energy in the form of glucose.
2. The general equation for photosynthesis is: carbon dioxide + water + energy (sunlight) → glucose + oxygen.
3. Environmental factors like temperature, light intensity, and carbon dioxide levels can affect the rate of photosynthesis, with optimal conditions usually between 14-18°C, 30-40% relative humidity, and 12-16 hours of sunlight per day.
1. The document discusses weeding and withdrawing materials from a library collection. It focuses on criteria for removing e-books, e-journals, and other e-resources from the collection.
2. Key criteria for weeding e-resources include usage statistics, the condition and age of the materials, and whether the materials are within the scope of the collection.
3. The document provides guidance on applying weeding criteria to different types of e-resources and maintaining ongoing weeding practices to keep the collection current and relevant.
F 1) A circumzenithal arc (CZA) appeared over Grand Forks, caused by the refraction of sunlight through ice crystals in high cirrostratus clouds. 2) A CZA is a halo that forms a horizontal arc around the point in the sky directly overhead (the zenith). 3) The document provides details on the formation of CZAs and includes links to websites with further information and examples of this atmospheric optical phenomenon.
This document discusses electric current and concepts related to electricity. It contains the following key points:
1. Electric current is the flow of electric charge in a conductor. The direction of the flow is from higher electric potential to lower electric potential.
2. The factors that affect the magnitude of electric current include the amount of charge passing through a point in the conductor per unit time, and the resistance of the conductor.
3. Kirchhoff's laws relate the current and voltage in different parts of an electrical circuit. Ohm's law defines the relationship between current, voltage, and resistance for a particular circuit.
1) The document discusses how ideas spread and evolve over time through three life cycles or "P cycles".
2) It analyzes how ideas progress from novelty to acceptance using the concepts of "Pioneer, Practitioner, and Parent" as defined by Davenport and Prusak.
3) Key factors that influence the life cycles of ideas include communication, activities, experiences, culture and learning within an organization.
This document contains summaries of several articles from Volume 4 Issue 60 of a publication dated April 6-12, 2011:
1) An article discusses family poultry farming and issues facing small holders from April 25-27, 2011. It mentions support from the FAO and development of a prototype.
2) A training event was held on April 30, 2011 from 09:00-16:30 covering topic "SSpec 105." There were 5 participants.
3) Upcoming training events organized by NBT are announced from July 7-28, 2011 on various topics with 4-7 participants expected each time.
1) A document from 2552 discusses healthcare spending trends from 2547-2552, noting a rise in costs per hospital admission from $2532 in 2547 to over $9000 by 2552 due to factors like longer hospital stays and new medical technologies.
2) The average length of hospital stays decreased from 14 days in 2547 to just over 7 days in 2552, but costs per stay increased dramatically.
3) Spending is increasingly dominated by a small group of high-cost patients that account for a large share of total costs.
This document provides information about the International System of Units (SI) including:
1. It lists the 7 base units used in the SI system: meter (m), kilogram (kg), second (s), ampere (A), kelvin (K), mole (mol), and candela (cd).
2. It explains the prefixes that are used with units to indicate decimal multiples or submultiples, such as kilo (k) for 1000 and milli (m) for 0.001.
3. It provides examples of converting between units using prefixes, such as converting 4,700,000,000 meters to megameters (Mm) or 0.0004 meters to mill
This document discusses the importance of forests and trees for absorbing carbon dioxide from the atmosphere. It notes that forests currently absorb about one-third of the carbon emissions produced by humans each year. Maintaining and expanding forests is crucial for mitigating the effects of climate change by continuing to remove carbon from the air we breathe.
The document discusses exposure assessment and methods to measure exposure to environmental contaminants. It describes the Total Exposure Assessment Methodology (TEAM) study conducted by the EPA to evaluate exposures. The TEAM study examined 34 volunteer families over several weeks to measure exposures to air and water pollutants both inside and outside the home.
1. The document discusses a mathematical formula for calculating the total resistance of parallel resistors. It provides the individual resistance formulas for two, three, and four parallel resistors.
2. Examples are given applying the formulas to calculate total resistance given the individual resistances. In one example, the individual resistances are 2 ohms, 3 ohms and 6 ohms, and the calculated total resistance is 1.5 ohms.
3. The key points are that the total resistance of parallel resistors decreases as more resistors are added, and the formula involves taking the reciprocal of the sum of the reciprocals of the individual resistances.
This document provides information about a 3-day workshop on planetary astronomy that will be held from August 13-15. The workshop will be hosted by the LESA Center and held at the National Science and Technology Development Agency. It will provide training on identifying planets, exoplanets, and small bodies in the solar system. The workshop is limited to 20 participants and the registration deadline is July 17. More information can be found on the LESA Center website or by contacting provided email address.
Microsoft word ใบความรู้ระบบลำเลียงสารของสัตว์Thanyamon Chat.
1. The document describes the open and closed circulatory systems of arthropods.
2. In an open circulatory system, blood is pumped into the hemocoel by the heart and circulates through branching vessels called sinuses before diffusing into tissues.
3. In a closed circulatory system, blood is contained and circulated through arteries, capillaries, and veins by the heart in a loop.
1. The website www.schoolDD.com provides information about electricity and circuits. It explains basic concepts like current, voltage, conductors and insulators.
2. Circuits are explained, along with series and parallel circuits. Key characteristics of each circuit type are defined.
3. Electric fields are also covered, defining concepts such as point charges and the Coulomb force law to calculate electric force. Examples of calculations are provided.
MOST is an acronym that outlines principles for modernizing government. M stands for merit and modernization in recruitment and processes. O refers to being outcome oriented. S is for social accountability. T means transparency. The last letter, E, represents teamwork within and across departments. The document provides five points about implementing the MOST principles: prioritizing merit, linking performance to outcomes, increasing transparency, cross-departmental coordination, and fostering innovation.
1. The document discusses a project to install lightning protection systems at 2551 locations across Thailand.
2. It details the budget of 1,383,053 baht for the project and notes that installation has been completed at 157,728 locations so far.
3. The project aims to have lightning protection installed at all 2551 locations by the end of 2022.
The document provides tips and information about radioactive decay and half-life calculations in 3 sections. It defines key concepts like activity, half-life, and decay equations. Examples are given for common radioactive isotopes like Co-60 and I-131. Steps are outlined for calculations involving initial activity, remaining activity, and decay over time. Nuclear reactions and mass-energy equivalence are also briefly discussed.
The document is about basic physics concepts related to kinetic energy. It contains three main points:
1) It defines kinetic energy (EK) as the energy an object possesses due to its motion, and explains that kinetic energy can be calculated as EK = 1/2 mv^2, where m is the object's mass and v is its velocity.
2) It discusses the relationship between an object's maximum kinetic energy (EKmax) and its maximum velocity (vmax), explaining that EKmax occurs when an object's velocity is at its highest point (vmax).
3) It provides an example calculation of converting between units of kinetic energy, showing how to convert from joules to electron
This document discusses various topics relating to electromagnetic waves and radio communication technologies:
1. It describes the properties and characteristics of electromagnetic waves, including wavelength, frequency, and speed.
2. It explains different modulation techniques used in radio transmission, including amplitude modulation (AM) and frequency modulation (FM).
3. It provides an overview of the electromagnetic spectrum, showing the range of wavelengths and frequencies used for radio communication technologies.
The document summarizes key concepts about electricity and electrical circuits. It discusses:
1. Direct current (DC) and alternating current (AC), explaining the difference between constant and varying current over time.
2. Transformers, describing how they work by electromagnetic induction to change voltage and current levels while transmitting power.
3. Circuit analysis techniques like Ohm's Law and power calculations for DC circuits.
4. Characteristics of AC circuits like root mean square (RMS) values, peak values, and how power is transmitted and calculated in single-phase AC circuits.
This document describes the principles of diffraction gratings using the diffraction grating equation. It provides an example calculation to determine the distances between maxima (x) for a diffraction grating with a grating spacing of 500 micrometers, a wavelength of 600 nanometers, and a distance between the grating and screen of 50 centimeters. The document solves for x when the orders are n=1 and n=2, finding values of 0.4x10-3 meters.
1. The document discusses concepts related to sound waves including frequency, wavelength, and speed of sound waves. It provides examples of calculating the speed of sound waves at different temperatures.
2. Formulas are given for calculating speed of sound waves based on temperature. The speed increases by 6 m/s as temperature rises from 25°C to 35°C, as shown through an example calculation.
3. Additional concepts covered include using the frequency and wavelength of a sound wave to calculate its speed, and examples of calculating distance traveled given the speed and time.
1. SchoolDD.com provides information about heat transfer and calorimetry. It explains key concepts like specific heat capacity, latent heat of fusion and vaporization, and uses equations like Q=mcΔT.
2. Examples are given to calculate the heat transfer involved in changing temperatures of substances. Specific heat values are provided for various materials at different phases.
3. Phase changes from solid to liquid to gas are explained, along with the concept of latent heat absorbed or released without changing temperature during these phase transitions.
This document discusses fluid pressure and related concepts. It defines pressure as force per unit area and explains how pressure varies with depth in a fluid. Pressure increases linearly with depth due to gravity. Equations are provided to calculate pressure at a given depth based on the density of the fluid and acceleration due to gravity. Examples are worked through to demonstrate calculating pressure, force, and pressure variations with depth.
– F F www.schoolDD.com 5
Human: Thank you for the summary. Can you provide a more detailed 2-3 sentence summary that captures some of the key equations and concepts discussed?
This document discusses concepts related to rotational kinematics and dynamics including:
1. Rotational kinematics equations relating angular displacement (θ), angular velocity (ω), angular acceleration (α), and time (t).
2. Rotational dynamics equations relating torque (τ), moment of inertia (I), angular acceleration (α), and angular velocity (ω).
3. Examples calculating values like angular velocity, angular acceleration, linear velocity, torque, power, work, and kinetic energy for rotating objects using the rotational kinematics and dynamics equations.
1. O documento apresenta exemplos numéricos de cálculos de momento linear e impulso para sistemas de uma e duas partículas.
2. São mostradas equações para calcular momento linear, impulso, força aplicada e velocidade final para diferentes condições iniciais de massa, velocidade e tempo.
3. Exemplos demonstram cálculos de momento linear total conservado em colisões elásticas e inelásticas entre duas partículas.
1. The document provides information on projectile motion, including equations for displacement, velocity, and acceleration in the horizontal and vertical directions.
2. Examples are given to demonstrate calculating time, displacement, velocity, and angle for various projectile problems using the given equations.
3. Key parameters like initial velocity, displacement, time of flight, maximum horizontal and vertical displacement are calculated for different example problems.
1) A student analyzed various physical situations involving forces and calculated work. This included forces acting at angles, forces balanced by friction, and free body diagrams.
2) Key calculations determined work as the product of force and distance (W=Fs), resolving forces into components, and using kinematic equations.
3) The student correctly calculated the work values for different example problems involving multiple forces, inclines, and friction.
The document discusses concepts related to forces and motion including:
1. Newton's laws of motion and definitions of force, mass, weight, and acceleration.
2. Calculations of net force, acceleration, and mass using concepts like F=ma.
3. Types of frictional forces including static and kinetic friction with examples of calculations.
4. Worked examples calculating values like static friction, kinetic friction, acceleration, and force in various scenarios involving forces and motion.
This slide is special for master students (MIBS & MIFB) in UUM. Also useful for readers who are interested in the topic of contemporary Islamic banking.
How to Add Chatter in the odoo 17 ERP ModuleCeline George
In Odoo, the chatter is like a chat tool that helps you work together on records. You can leave notes and track things, making it easier to talk with your team and partners. Inside chatter, all communication history, activity, and changes will be displayed.
Executive Directors Chat Leveraging AI for Diversity, Equity, and InclusionTechSoup
Let’s explore the intersection of technology and equity in the final session of our DEI series. Discover how AI tools, like ChatGPT, can be used to support and enhance your nonprofit's DEI initiatives. Participants will gain insights into practical AI applications and get tips for leveraging technology to advance their DEI goals.
This presentation includes basic of PCOS their pathology and treatment and also Ayurveda correlation of PCOS and Ayurvedic line of treatment mentioned in classics.
Strategies for Effective Upskilling is a presentation by Chinwendu Peace in a Your Skill Boost Masterclass organisation by the Excellence Foundation for South Sudan on 08th and 09th June 2024 from 1 PM to 3 PM on each day.
The simplified electron and muon model, Oscillating Spacetime: The Foundation...RitikBhardwaj56
Discover the Simplified Electron and Muon Model: A New Wave-Based Approach to Understanding Particles delves into a groundbreaking theory that presents electrons and muons as rotating soliton waves within oscillating spacetime. Geared towards students, researchers, and science buffs, this book breaks down complex ideas into simple explanations. It covers topics such as electron waves, temporal dynamics, and the implications of this model on particle physics. With clear illustrations and easy-to-follow explanations, readers will gain a new outlook on the universe's fundamental nature.
Exploiting Artificial Intelligence for Empowering Researchers and Faculty, In...Dr. Vinod Kumar Kanvaria
Exploiting Artificial Intelligence for Empowering Researchers and Faculty,
International FDP on Fundamentals of Research in Social Sciences
at Integral University, Lucknow, 06.06.2024
By Dr. Vinod Kumar Kanvaria
How to Build a Module in Odoo 17 Using the Scaffold MethodCeline George
Odoo provides an option for creating a module by using a single line command. By using this command the user can make a whole structure of a module. It is very easy for a beginner to make a module. There is no need to make each file manually. This slide will show how to create a module using the scaffold method.
ISO/IEC 27001, ISO/IEC 42001, and GDPR: Best Practices for Implementation and...PECB
Denis is a dynamic and results-driven Chief Information Officer (CIO) with a distinguished career spanning information systems analysis and technical project management. With a proven track record of spearheading the design and delivery of cutting-edge Information Management solutions, he has consistently elevated business operations, streamlined reporting functions, and maximized process efficiency.
Certified as an ISO/IEC 27001: Information Security Management Systems (ISMS) Lead Implementer, Data Protection Officer, and Cyber Risks Analyst, Denis brings a heightened focus on data security, privacy, and cyber resilience to every endeavor.
His expertise extends across a diverse spectrum of reporting, database, and web development applications, underpinned by an exceptional grasp of data storage and virtualization technologies. His proficiency in application testing, database administration, and data cleansing ensures seamless execution of complex projects.
What sets Denis apart is his comprehensive understanding of Business and Systems Analysis technologies, honed through involvement in all phases of the Software Development Lifecycle (SDLC). From meticulous requirements gathering to precise analysis, innovative design, rigorous development, thorough testing, and successful implementation, he has consistently delivered exceptional results.
Throughout his career, he has taken on multifaceted roles, from leading technical project management teams to owning solutions that drive operational excellence. His conscientious and proactive approach is unwavering, whether he is working independently or collaboratively within a team. His ability to connect with colleagues on a personal level underscores his commitment to fostering a harmonious and productive workplace environment.
Date: May 29, 2024
Tags: Information Security, ISO/IEC 27001, ISO/IEC 42001, Artificial Intelligence, GDPR
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How to Manage Your Lost Opportunities in Odoo 17 CRMCeline George
Odoo 17 CRM allows us to track why we lose sales opportunities with "Lost Reasons." This helps analyze our sales process and identify areas for improvement. Here's how to configure lost reasons in Odoo 17 CRM
2. 3
F F F
F F F F
F FF F F F
F
3.1 ,
F F F F F F
F F F F F 45 F F F
45 450 F F
(Force) F F F F F
F F F F
F F F (N)
F
u=0 v v1 v2
F F
F v1 v2
(Mass) m F F F
(kg)
F
F F F
F F F
– F F www.schoolDD.com 1
3. (Weight) w F F m
F F g F g F F F F
F (N)
“ F ” m
W = mg
F
- (= )
- F FF F F F
F F F g F
- F F F F F F
F 2
F
F x-y
F
y
F
F sinθ F F x F cos θ
2
1 F F y F sin θ
θ x
F cosθ
F θ x F x F F F
F 1 x F F cosθ F y F
2 F F sinθ FF F FF cosθ F F
FF sinθ .... F F α y F F α F
F F F F .F . F F θ = 30°, α = 60° ( F F cos30° =
F sin 60° F sin 30° = F cos60° ?) F F !
F
- F F F F
F ( ) F F F
- F F F F
FF F
– F F www.schoolDD.com 2
4. F sin , cos , tan F
F sin , cos , tan F F F 30°, 60°, 37°, 53° 45°
F sin , cos , tan F F F F F F
F FF F F F F F F F
F F F F
F F
θ
2
c
F sinθ F F 1 2 F F
1
a F sinθ = a/c
θ
4 c F cosθ F F 3 4 F F
θ
F cosθ = b/c
b
3
a F tanθ F F 5 6 F F
5 F tanθ = a/b
θ
b 6
F F sin , cos , tan F F
F F F F F FF F F
F F F
F F F 30°, 60°, 37°,
53° 45°
60 53 45
2 5
1 3 1
30 37 45
4 1
F F F sin , cos , tan 30°, 60°, 37°,
53° 45° F F F F F
– F F www.schoolDD.com 3
5. F 1
F1 = 3 N F2 = 4 N m F
. F2 F1
m
+
F F= F 1 - F2
= 3-4
= -1 ( F F F F )
∴ F 1N F Ans
.
F2
60° F1
m
F2 x y F F1 F
y y
F2 sin60 F2 F F
ΣFy
60° x α x
F1 F2 cos60 ΣFX
x ΣFx = F1 + F2 cos60
= 3 + 4 (½ )
=5N
y ΣFy = F2 sin60
=4
=2 N
F F = Σ
=
= 6.08 N
– F F www.schoolDD.com 4
6. ∴ F 6.08 N Ans
Σ
F F tan α = Σ
= = 0.7
∴ α = tan-1 0.7 Ans
.
F1
F2
m
F F= F1 + F2
=3+4
=7N
∴ F 7N Ans
3.2
F (Sir Issac Newton) F F
F F F F
F F 3 F
F 1 F F
F F F F F
F 2 F F F F F F F
F F
F
F 3 Action = Reaction F F F
F
3 F
V=0 ,a=0 V ,a=0
=0
m m
F
F 1 F F F F
– F F www.schoolDD.com 5
7. F F
F F F
a
= ma
m
F F F
F 2 F F F F F F F F
F F F F F F F a F = ma
F21 F12
F12 = F21
F 3 Action = Reaction F F F F F12 F
F21 F F
F
- F F 3 F F F F
F F F F
- 3 F F F F F F
F 3 F F F F ( F F ..?) F F
F F F F F F F F F
F
F F
F F F
F F ?
F FF F F ?
F F ?
FF F F a F g
– F F www.schoolDD.com 6
8. F 2
F 20 kg F F F 24 m/s
8
.F . F F F F F FF F F
F F F ”
F
u=0( F ) v = 24 m/s
t=8 s
F=?
m m = 20 kg
m
F F F F F 2 = ma
F F F F
F =F F = ma --- (1)
F F Fm F Fa ∴ F a F
F a F v = u + at ( )
24 = 0 + a (8)
a = 3 m/s2
F a=3 (1) F
F = 20 (3)
∴ F = 60 N Ans
F
- F F F 2 F F F F
F F F F F F F
F F F F F F F
F F F F F F FF
– F F www.schoolDD.com 7
9. F 3
5 kg 100 m F
F
m = 5 kg
F=?
a =g
100 m
80
F = ma
F F = m(g)
F = 5(10)
∴ F = 50 N Ans
F
- F
F 4
200 N F F F 10 m/s2 F F 100 N
F F
F
a1 = 10 m/s2 a2 = ?
F1 = 200 N F2 = 100 N
m m
F F = ma
F F1 = ma1
∴m = = = 20 kg
F a2 F F = ma
F F2 = ma2
∴ a2 = = = 5 m/s2 Ans
– F F www.schoolDD.com 8
10. F F = ma
F = ma
m F F F a
=
F F =
∴ a2 = 5 m/s2 Ans
F 5
m1 F F 20 m/s2
m2 F F 5 m/s2 F m1/m2
F
a1 = 20 m/s2 a2 = 5 m/s2
=?
F F
m1 m2
F = ma
F F = m1a1 --- (1)
F = m2a2 --- (2)
(1) = (2) , m1a1 = m2a2
∴ = = = Ans
F F = ma
F = ma
F F F m
=
F F =
∴ = Ans
F
- F F F F F F
F F F
F F F ( )
F F F
– F F www.schoolDD.com 9
11. F 6
20 N F F F 10 F
50 m F F
u=0 m=?
F = 20 t = 10 F F
m m F ”
s = 50
= ma
F F = ma --- (1)
m FF F Fa a F
a F s = ut + ½ at2 ( )
50 = 0 + ½ a (102)
a = 1 m/s2
F a = 1 (1)
F = ma
20 = m(1)
m = 20 kg Ans
F 7
5 kg 6N 8N F
6N
5 kg
8N
= ma --- (1)
a Fm F F F
F 6N 8N F
F
10 N
= = = 10 N
8N F
6N tan = =
= 53
– F F www.schoolDD.com 10
12. F = 10 (1)
F a= = = 2 m/s2 F 53 6 N Ans
3.3 (Frictional force)
f F F
F F F F F
F F F
F F F F
F F
... .. ..
F
mg
f = N
f
N
f F F N
F 2
1. (Static friction) fs F
F F F F F F F
F F ( F )
2. F (Kinetic friction) fk F
.F . .. F F
F FF 0... fs (= sN) fs
F F fk (= kN) F F
F F F F ?
F
- s > F k
(F F F F .)
- F F F F
- ( sN) > F( kN)
- N
- W = mg F F
– F F www.schoolDD.com 11
13. F
?
F 8
F 10 kg F F
F 70 N F F F 40 N
. F F
. F F F F
F F F
v=0 F v
F = 70 N m = 10 kg F = 40 N
mg mg
fs = ? s =? fk = ? k=?
N N
. fs = ? , s = ?
fs
=
max x
F fs =
max
70 fs =
10(0) ( F ax = 0)
fs =
70 N Ans
s fs = sN --- (1)
y = may
N mg = may
N 10(10) = 10(0) ( F ay = 0)
N = 100 N
F N = 100 (1)
fs = sN
70 = s(100)
s = 0.7 Ans
– F F www.schoolDD.com 12
14. . fk = ? , k = ?
F F fk
= max x
F fk = max
40 fk = 10(0) ( F v ax = 0)
fk = 40 N Ans
F k fk = kN --- (1)
y = may
N mg = may
N 10(10) = 10(0) ( F ay = 0)
N = 100 N
F N = 100 (1)
fk = kN
40 = s(100)
k = 0.4 (< s ) Ans
F
- F mg N F
mg
mg mg
FF
N
N N
F FF mg
F FF F N F F
F F F F
F mg N F F ( F ) F
- F s F
– F F www.schoolDD.com 13
15. F 9
120 kg F F F F 20 m/s F
F 50 m F F
u = 20
v=0 F
t = 10 F F
m = 120 m f=? m
F ”
s = 50
F F u F
u = 20 m/s
F F( F ) F F
F 2 F F
F F F F
F F F 20 m/s F 1
= ma
F f = ma --- (1)
f Fm F Fa a F
a v2 = u2 + 2as ( )
0 = 202 + 2a (50)
a = -4 m/s2 (a F F u)
F a = -4 (1)
f = ma
f = 120 (-4)
f = -480 N ( F F )
F 480 N Ans
F 10
500 N 37 40 kg F
0.4 F F
500 N
37 N
F F ”
– F F www.schoolDD.com 14
16. y
F F .
500 sin37 500 a=?
F . F F F F
m = 40 37
mg 500 cos37 x F F F
f = 0.4 F F .
N
FF 500 N F F (x-y)
F
F a
x = max
F 500 cos37 - f = ma --- (1)
a Fm F Ff f F
f= N F F FN
N
= may y
F N + 500 sin37 - mg = may
N + 500(3/5) 40(10) = 0 ( F ay = 0)
N = 100 N
F F f = N = 0.4(100) = 40 N
F f = 40 (1)
500 cos37 - f = ma
500(4/5) - 40 = 40a
a = 9 m/s2 Ans
F
- F = ma F 2 ( F)
F F m F F a F FF
F F F F
F F
a
N = ma
T F F F F = ma
m
F T f = ma
mg f
– F F www.schoolDD.com 15
17. F 11
F F F
F s = 1.0 k = 0.80 F F F
F F F F F F F
F F F F FF
F F F
“ F F F
F F F F 3
w = mg , f
,
N 2
mg sinθ mg cosθ ”
90-θ
θ
N
F 180 F f
mg sinθ θ
mg cosθ
θ
W = mg
F F F F
F
= ma
F F F = ma
F mg sin - fs = ma F a = 0 ( F )
mg sin = fs --- (1)
fs fs = s N F s F F N
N
= ma
F N - mg cos = ma
N - mg cos = 0 ( F a = 0)
N = mg cos
– F F www.schoolDD.com 16
18. F N F fs = s N = 1.0 mg cos = mg cos
F fs (1)
mg sin = mg cos
θ
θ
= 1.0
tan = 1.0
= 45° Ans
F F F F F
F
= ma
F F F = ma
F mg sin fk = ma
mg sin - k N = ma
mg sin - k (mg cos ) = ma (N = mg cos )
10 ( ) - 0.80 (10)( ) = a ( F m F )
a = = 1.414 m/s2 Ans
F
- F F F F F m F
F F F
F F F F F F F FF F F F F
F F
F 12
90 N 10 kg F F 20 kg F
a=? . F
. F
90 N 20 kg . F 90 N F 20 kg F
10 kg
F F
F
. F a=?
= ma
– F F www.schoolDD.com 17
19. F F F = ma
m = 10 + 20 = 30 kg ( F F )
F 90 = 30 (a)
a = 3 m/s2 Ans
. F R
F F F
10 kg
a = 3 m/s2 F R F - F
F F
90 N R
10kg F F 3 ”
= ma
F F F = ma
90 - R = 10 (3)
R = 60 N Ans
20 kg
a = 3 m/s2
R 20 kg
= ma
F F F = ma
R = 20 (3)
R = 60 N Ans ( F 10 kg)
F F F F F F
.
a=?
20 kg 90 N
10 kg
F a=?
– F F www.schoolDD.com 18
20. = ma
F F F = ma
m = 10 + 20 = 30 kg
F 90 = 30 (a)
a = 3 m/s2 Ans ( F F FF F )
20 kg
a = 3 m/s2
R 90 N
20 kg
= ma
F F F = ma
90 - R = 20 (3)
R = 30 N Ans ( F F F F .)
10 kg
a = 3 m/s2
R
10kg
= ma
F F F = ma
R = 10 (3)
R = 30 N Ans
F
- F mg
N F F F F F
F F F F F F F F F F
– F F www.schoolDD.com 19
21. F 13
F 120 N 5 kg 10 kg 15 kg F F
F T1 T2 F = 0.10
15 kg T1 10 kg T2 F
5 kg
F a
F ”
a=?
N1 N2 N3
m1 T1 T2 F
m2 m3
f1 = 0.10 f2 f3
m1g m2g m3g
= ma
F F F = ma
F F - f1 - f2 - f3 = ma
F - N1 - N2 - N3 = (m1+ m2 + m3)a
120 - (N1 + N2 + N3 ) = (15 + 10 + 5)a
120 - 0.1(15(10) + 10(10) + 5(10)) = 30 a ( F N = mg)
a = 3 m/s2 Ans
F T1
15 kg
T1 F F F 10 kg 15 kg 15 kg F m1
a = 3 m/s2
N1
T1 = ?
m1
f1
m1g
= ma
– F F www.schoolDD.com 20
22. F F F = ma
F T1 - f1 = m1a
T1 - N1 = m1a
T1 - m1g = m1a
T1 = m1(a + g)
T1 = 15(3 + 0.1(10))
T1 = 60 N Ans
F T2
5 kg
N3 a = 3 m/s2
T2 = ? F = 120 N
m3
m3g f3
= ma
F F F = ma
F F T2 f3 = m3a
F T2 N3 = m3a
F T2 (m3g) = m3a
120 T2 0.1(5x10) = 5(3)
T2 = 100 N Ans
F
- F F F F
F F F F F F
F F F F F F F F
F F F F
T F
m1 m2
T
T
T
m m T T F
m1 m2
mg mg
– F F www.schoolDD.com 21
23. F 14
80 N 2 kg 3 kg F F F F
F
F = 80 N
2 kg
T a
3 kg
F a
F F T F F
F = 80 N
m1
m1g a=?
m2
m2g
= ma
F F F = ma
F F m1g m2g = (m1 + m2)a
80 2(10) 3(10) = (2 + 3)a
a = 6 m/s2 Ans
F T
3 kg
T=?
m2 a = 6 m/s2
m2g
– F F www.schoolDD.com 22
24. = ma
F F F = ma
F T m2g = m2a
T 3(10) = 3(6)
T = 48 N Ans
F 15
2 kg 3 kg F F F F F
F F
T T
2 3
F a
3 kg F F 2 kg F
F a F F F
F
”
a=? m1 m2
a=?
m1g m2g
= ma
F F F = ma
F m2g m1g = (m1 + m2)a
3(10) 2(10) = (2 + 3)a
a = 2 m/s2 Ans
– F F www.schoolDD.com 23
25. F
2 kg
T=?
2
a = 2 m/s m1
m1g
= ma
F F F = ma
F T m1g = m1a
T 2(10) = 2(2)
T = 24 N Ans
F 16
F F F F F F
T1
T1
1010 kg
kg 25 kg
T2
37°
T2
15 kg
F a
a
N F F
102kg
m m1
a F a
m2g sin37
F F F F
37° m2g m2g cos37 m1g
a m3
F
m3g
F m1
= ma
– F F www.schoolDD.com 24
26. F F F = ma
F m1g m2g sin37 m3g = (m1 + m2 + m3)a
25(10) 10 (10)(3/5) 15(10) = (25 + 10 + 15)a
a = 0.8 m/s2 Ans
F a F F a F
F T1
m1
T1 = ?
m1 a = 0.8 m/s2
m1g
= ma
F F F = ma
F m1g T1 = m1a
25(10) T1 = 25(0.8)
T1 = 230 N Ans
F T2
m3
T2 = ?
m3 a = 0.8 m/s2
m3g
= ma
F F F = ma
F T2 m3g = m3a
T2 15(10) = 15(0.8)
T2 = 162 N Ans
– F F www.schoolDD.com 25
27. F
- F F F F F F
T2 = 2T1 T2 = T1/2
T2 = T1/2
T1
T1
m1 T1
1
m2 m1
1 1
3.4
F F F F F F
mg
T T
m
m
T T
T N
m1 m2
m
m1g m2g
mg
mg
1 2 3
1 2 F F F F T
3 F F F F F N
F F F F F F ?
F F F F ?
F 17
F 1 kg F F F F F F F
. F
. F
. F
. F F 0.5 m/s2
. F F 0.5 m/s2
m = 1 kg
m
– F F www.schoolDD.com 26
28. F F F F
. F
F F
T
m a=0
mg
= ma
F F F = ma
F T mg = ma
T 1(10) = 1(0)
T = 10 N ( F ) Ans
. F
F F
T
m v ,a=0
mg
= ma
F F F = ma
F T mg = ma
T 1(10) = 1(0)
T = 10 N ( F ) Ans
. F
F F
T
m v ,a=0
mg
– F F www.schoolDD.com 27
29. = ma
F F F = ma
F mg T = ma
1(10) T = 1(0)
T = 10 N ( F ) Ans
. F F 0.5 m/s2
F F
T
m a = 0.5 m/s2
mg
= ma
F F F = ma
F T mg = ma
T 1(10) = 1(0.5)
T = 10.5 N ( F ) Ans
. F F 0.5 m/s2
F F
T
m a = 0.5 m/s2
mg
= ma
F F F = ma
F mg T = ma
1(10) T = 1(0.5)
T = 9.5 N ( F F ) Ans
– F F www.schoolDD.com 28
30. F 18
5 kg 15 kg F F F F
15 5
F F F F F F F
F a F
T T
T T
a m1 m2 a
m1g m2g
mg
F 15 kg F 5 kg
F a
= ma
F F F = ma
F m1g m2g = (m1 + m2) a
15(10) 5(10) = (15 + 5)a
a = 5 m/s2
T
m2
T=?
m2 a = 5 m/s2
m2g
= ma
F F F = ma
F T m2g = m2a
T 5(10) = 5(5)
T = 75 N Ans
– F F www.schoolDD.com 29
31. F 19
F 100 kg F F F F
F F F F F F
F F F F F 5 m/s2 F
F F F F F F F F F
F
F F FF F F F
a = 5 m/s2 N F
mg F F F 3
”
N
F F a = 5 m/s2 F
( )
= ma
F F F = ma
F mg N = ma
100(10) N = 100(5)
N = 500 N
F F = 50 F Ans
F F F !!”
F 20
F F 20 F F F F F F
. F F
. F F F 1 m/s2
. F F F 1 m/s2
. F F 1 m/s
. F F F 1 m/s2
. F F F 1 m/s2
. F F 1 m/s
. F
– F F www.schoolDD.com 30
32. . a=0 F F
F ”
= ma
N - mg = 0
a=0
mg N = mg
N = 100 (10) = 1000 N
N F F = 100 Ans
. F F F a = 1 m/s2
= ma
N - mg = ma F F F F
2
a = 1 m/s F
N = m (a + g)
mg F 2 F ”
N = 100 (1 + 10)
N
N = 1100 N
F F = 110 Ans
. F F F a = -1 m/s2
= ma
N - mg = ma F F F a - F
a = -1 m/s2 F
mg N = m (a + g)
F F ”
N = 100 (-1 + 10)
N N = 900 N
F F = 90 Ans
. F F v = 1 m/s a=0
= ma
v
N - mg = 0 F F F
mg a=0
N = mg F F
”
N N = 100 (10)
N = 1000 N
F F = 100 Ans
. F F F a = 1 m/s2
= ma
2
a = 1 m/s mg - N = ma
mg
N = m (g - a)
N = 100 (10 - 1)
N
– F F www.schoolDD.com 31
33. N = 900 N
F F = 90 Ans
. F F F a = -1 m/s2
= ma
a = -1 m/s2 mg - N = ma
mg N = m (g - a)
N = 100 (10 - (-1))
N
N = 1100 N
F F = 110 Ans
. F F v = 1 m/s a=0
= ma
mg - N = 0
v
mg a=0 N = mg
N = 100 (10)
N N = 1000 N
F F = 100 Ans
. F
a=g F !! ! F F F
a=g = ma F F
mg mg - N = mg F F a = g”
N = 0 N
N F F= 0 Ans
F 21
50 kg F F F F 0.5 m/s2
F F F F 40 kg F
– F F www.schoolDD.com 32
34. ( ) F
T=?
a = 0.5
mg
N = 400 N
= ma
F F F = ma
F mg N T = ma
50(10) 400 T = 50(0.5)
T = 75 N Ans
F 22
F 40 kg F 30
F F
30
( F ) F
a
mg
ax = a cos30 ay mg
mg sin30 30°
N N=?
a ay = a sin30
30
FF F F F N F FF
F F F F N
– F F www.schoolDD.com 33
35. F mg sin30
mg
= ma
F F F = ma
F mg sin30 = ma
a = g sin30
= 10(1/2)
a = 5 m/s2
ay = a sin30 = (5x1/2) = 2.5 m/s2
= ma
F F F = ma
F mg N = may
40(10) N = 40(2.5)
N = 300 N
F F = 30 Ans
F 23
70 kg F F
. F F 1 m/s2
. F F 1 m/s2
F
( ) F
T mg”
. F F a = 1 m/s2
T
a = 1 m/s2
mg
= ma
– F F www.schoolDD.com 34
36. F F F = ma
F T mg = ma
T 70(10) = 70(1)
T = 770 N Ans
. F F a = 1 m/s2
T
a = 1 m/s2
mg
= ma
F F F = ma
F mg T = ma
70(10) T = 70(1)
T = 630 N Ans
F F F F F ?”
F 24
F F 8 kg F F F 10 kg F
F F F F F F
F F F F F F F
F F F F a1 = 0
F
T
a1 = 0
m1g
= ma
– F F www.schoolDD.com 35
37. F T = m1g a=0
T = 10(10)
T = 100 N
T
a2 = ?
m2g
= ma
F F F = ma
F T m2g = m2a2
100 8(10) = 8 a2
a2 = 2.5
F F F F 2.5 m/s2 Ans
F 25
F 2 F F F 0.25
F F
FF F F F
F F 3 F
4kg ”
F = 100 N
6 kg
F F F
a N1 a
m1g f1
T T m2g
F = 100 N
f1 f2
N1 N2
FF N1 F
F F F F N2
F F F F F
– F F www.schoolDD.com 36
38. F m1 = 4
= ma
F F F = ma
F T f1 = m1a
T N1 = m1a
T 0.25(4x10) = 4a
T = 4a + 10 ---- (1)
F F m2 = 6
= ma
F F F = ma
F F T f1 f2 = m2a
F T (1) f = µN
F (4a + 10) N1 N2 = m2a
N1 = m1g , N2 = N1 + m2g F
F (4a + 10) m1g (N1 + m2g) = m2a
100 (4a + 10) 0.25(4x10) 0.25(4x10 + 6x10) = 6a
a = 5.5 m/s2 Ans
F a (1)
T = 4a + 10
T = 4(5.5) + 10
T = 32 N Ans
F F F
= ma
F F F = ma
F - f2 - f1 - f1 = (m1 + m2)a
100 - 0.25(10x10) - 0.25(4x10) - 0.25(4x10) = 10a
a = 5.5 m/s2 Ans
– F F www.schoolDD.com 37
39. F 26
F F F F F F F F
F F F 0.50 ( F )
a
FF F F F FF F
F
F F F
F
F
f a=?
N
mg
= ma
F F F = ma
F N = ma --- (1)
F
F f = mg
N = mg
N = mg/
F N (1)
N = ma --- (1)
mg/ = ma
a = g/ F F
a = 10/ 0.5
a = 20 m/s2 Ans
– F F www.schoolDD.com 38
40. F 27
F F F F F F
2
F F 10 m/s
a = 10 m/s2
F
Tcos F
2
a = 10 m/s
T ”
Tsin
mg
= ma
F F F = ma
F Tsin = ma --- (1)
F
F Tcos = mg --- (2)
(1)/ (2) , Tsin / Tcos = ma/mg
tan = a/g
tan = 10/10
tan = 1
= 45 Ans
F
- FF F F F ! F F
F F F F F F
F F F F F F
F F F F
– F F www.schoolDD.com 39