This document provides an introduction to physics, covering several key topics:
- The main areas of physics are mechanics, thermodynamics, vibrations and waves, optics, electromagnetism, relativity, and quantum mechanics.
- Dimensional analysis is used to determine whether equations are valid by checking that quantities with the same dimensions can be combined and that both sides of an equation have the same dimensions.
- Symbols like Δ, Σ, g, x are commonly used in physics equations to represent concepts like change, sum, gravitational acceleration, and displacement.
Physical Quantities--Units and Measurement--Conversion of UnitsKhanSaif2
This presentation covers physical quantities and their types, units and their types, conversion of units and order of magnitude in a very interactive manner. I hope this presentation will be helpful for teachers as well as students.
Physical Quantities--Units and Measurement--Conversion of UnitsKhanSaif2
This presentation covers physical quantities and their types, units and their types, conversion of units and order of magnitude in a very interactive manner. I hope this presentation will be helpful for teachers as well as students.
The combination of Bayesian statistics and neural networks has proven to excel in predictive analytics. Blue Yonders solution NeuroBayes was developed and applied first in the field of particle physics but it can be successfully applied to a broad range of everyday problems for example demand prediction in retail. In this talk we introduce the basic concepts and explain the structure, components, and operations that build up an application for prediction.
Concept of Particles and Free Body Diagram
Why FBD diagrams are used during the analysis?
It enables us to check the body for equilibrium.
By considering the FBD, we can clearly define the exact system of forces which we must use in the investigation of any constrained body.
It helps to identify the forces and ensures the correct use of equation of equilibrium.
Note:
Reactions on two contacting bodies are equal and opposite on account of Newton's III Law.
The type of reactions produced depends on the nature of contact between the bodies as well as that of the surfaces.
Sometimes it is necessary to consider internal free bodies such that the contacting surfaces lie within the given body. Such a free body needs to be analyzed when the body is deformable.
Physical Meaning of Equilibrium and its essence in Structural Application
The state of rest (in appropriate inertial frame) of a system particles and/or rigid bodies is called equilibrium.
A particle is said to be in equilibrium if it is in rest. A rigid body is said to be in equilibrium if the constituent particles contained on it are in equilibrium.
The rigid body in equilibrium means the body is stable.
Equilibrium means net force and net moment acting on the body is zero.
Essence in Structural Engineering
To find the unknown parameters such as reaction forces and moments induced by the body.
In Structural Engineering, the major problem is to identify the external reactions, internal forces and stresses on the body which are produced during the loading. For the identification of such parameters, we should assume a body in equilibrium. This assumption provides the necessary equations to determine the unknown parameters.
For the equilibrium body, the number of unknown parameters must be equal to number of available parameters provided by static equilibrium condition.
These notes are of chemistry class 11th first chapter which are strictly according to CBSE & state Board. This notes covers Some basics concepts of chemistry i.e. Branches of chemistry, classification of matter & many more..
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.
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
Normal Labour/ Stages of Labour/ Mechanism of LabourWasim Ak
Normal labor is also termed spontaneous labor, defined as the natural physiological process through which the fetus, placenta, and membranes are expelled from the uterus through the birth canal at term (37 to 42 weeks
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
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Dive into the world of AI! Experts Jon Hill and Tareq Monaur will guide you through AI's role in enhancing nonprofit websites and basic marketing strategies, making it easy to understand and apply.
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2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
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Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
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Acetabularia acetabulum is a single-celled green alga that in its vegetative state is morphologically differentiated into a basal rhizoid and an axially elongated stalk, which bears whorls of branching hairs. The single diploid nucleus resides in the rhizoid.
Macroeconomics- Movie Location
This will be used as part of your Personal Professional Portfolio once graded.
Objective:
Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
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2. Objectives
The student will be able to:
• Identify activities in fields that involve the major areas
within physics.
• Identify the basic dimensions and their standard unit and
know how to convert between units.
3. The Main Areas of Physics
Physics can be broken down into seven main categories:
Name The study of...
Mechanics motion and its causes
Thermodynamics heat and temperature
Vibrations and Waves specific types of repetitive motions
Optics Light
Electromagnetism electricity, magnetism, and light
Relativity particles moving at any speed, relative to an
observer
Quantum Mechanics behavior of particles like protons, neutrons,
electrons, and even smaller things
4. Which area of physics would be the most
relevant to each of these situations?
o A high school football game
o Food preparation for the prom
o Playing in the school band
o Lightning in a thunderstorm
o Wearing a pair of sunglasses outside in the sun
5. Simplifying the Physical World
a
a
First identify the system you are attempting to study
System - set of items or interactions considered a distinct
physical entity for the purpose of study
Next, disregard all characteristics of the system that have little
to no effect on its motion.
At this point, we have constructed a model for our situation.
Model - a replica or description designed to show the structure
or workings of an object, system, or concept
9. Numbers as Measurements
• Numbers in math class can stand by themselves and be
meaningful
• In science, we need to give that number a dimension, or a
kind of physical measurement, in order to make it
meaningful.
• Three most common types of dimensions: length, mass,
time
10. SI Prefixes
The most common SI prefixes that we will use in this class are
listed below. You are responsible for memorizing these SI
prefixes.
Power Prefix Abbreviation
10-6 micro μ (pronounced mu)
10-3 milli m
10-2 centi c
103 kilo k
11. Converting Units
Steps for unit conversion:
1. Identify and write what you are converting from and what
unit you want to convert to.
2. Next, identify whether you have the information to convert
the unit.
3. If so, multiply the original unit by a conversion ratio.
4. Cancel units.
5. Multiply the numbers.
Sig Figs are NOT taken into account when completing a unit
conversion.
13. Both Dimension and Units Must Agree!
• You cannot convert
from one type of unit
to another
• ex: mass to length
• Examples of
acceptable unit
conversions
• meters to miles
• seconds to hours
• If you are measuring a length, make sure your units are in
meters
14. Wrap Up
• What are the three basic dimensions, what units are most
commonly used to describe them?
• A typical radio wave has a period of 1 μs. Express this time
in seconds.
15. Objectives
The student will be able to:
• Distinguish between accuracy and precision
• Use significant figures in measurements and calculations
16. Accuracy and Precision
• Careful measurements are important in science
• No measurement is perfect
• Two terms that describe this imperfection:
• Accuracy: how close a reported measurement is to the
true value of the quantity measured
• Precision: the degree of exactness or refinement of a
measurement
18. Sources of Error
Problems with accuracy are due to error
• Human Error: Mistakes made in reading an instrument or
recording the results
• Method Error: When measurements are taken using
different methods
• Parallax: An overestimate or underestimate due to the
improper viewing of a measuring device
• Instrumental Error: Improperly displayed measurements
due to poorly calibrated devices
19. Precision and Significant Figures
• Significant figures (Sig Figs) describe the precision of a
measuring device
• Significant Figures: those digits in a measurement that are
known with certainty plus the first digit that is uncertain
20. Review of Sig Fig Rules
Zero Rules:
• Zeros between other nonzero digits are significant
• 50.3 m has three sig figs
• Zeros in front of nonzero digits are not significant
• 0.553 m has three sig figs
• Zeros that follow a nonzero digit and are before or after a
decimal point are significant
• 50.00 has four sig figs
21. LETS PLAY: THE SIG FIG IS RIGHT
Determine how many sig figs
are in the following quantities:
1. 5.03 x 101 m
2. 3.0025 s
3. 8.92 x 10-1 kg
4. 0.8 x 10-4 ms
5. 5.700 x 101 g
6. 2.000000 kg
7. 2,100 kg
8. 0.75 cm
SIG FIG
22. Rules For Calculating Sig Figs
• Addition and Subtraction:
• Final answer should have the same number of sig figs to
the right of the decimal place as the number with the
smallest number of digits to the right of the decimal
• Multiplication and Division:
• The final answer should have the same number of sig figs
as the measurement having the smallest number of sig
figs
23. Rounding Rules
Keep the same if…
• If the digit after the last sig fig is less than 5
Ex: 30.24 30.2
• If the last sig fig is even, and the next digit is a 5 with no
other nonzero digits
Ex: 31.45 31.4 or 31.6500 31.6
Round up if…
• If the digit after the last sig fig is greater than five
Ex: 42.67 42.7
• If the digit after the last sig fig is a 5 followed by other
nonzero digits
Ex: 76.45001 76.5
• If the last sig fig is odd, and the next digit is a 5 with no
other nonzero digits
Ex: 54.75 54.8 or 79.3500 79.4
24. LETS PLAY: THE SIG FIG IS RIGHT...
AGAIN! (Bob Barker demands it!)
Determine what the final answer
would look like after performing
the indicated operation for the
following questions:
1. 97.3 km + 5.85 km
2. 123 s • 5.35 s
3. 57 kg + 3.021 kg • 74.3 kg
SIG FIG
AGAIN
25. Wrap Up
Answer the following questions in your group:
• Why are significant figures important?
• What steps could an experimenter take to ensure that their
experiment is as accurate as possible?
26. Objectives
The student will be able to:
• Interpret data in tables and graphs, and recognize
equations that summarize data
• Use dimensional analysis to check the validity of
expressions
27. The Language of Physics
• Mathematical equations are used to describe physical
phenomenon
• Learning to read a mathematical formula is like learning a
new language
• For example:
Equation Simple English
ΣF = ma
A net force is the result of some mass
undergoing an acceleration.
29. Textbook Shorthand Note
• Any symbol written in standard font is to be considered a
unit
• Any symbol written in italic font is considered to be a
variable
30. Evaluating Physics Expressions
• Dimensional Analysis: the process of evaluating dimensions
in an equation to determine its validity
• Rules of Dimensional Analysis
• Quantities can only be added or subtracted if they have
the same dimensions
• The two sides of any given equation must have the same
dimensions
• Any dimension can be multiplied or divided by another
dimension
31. Dimensional Analysis Example 1
• Determine whether or not the following equation is
dimensionally consistent.
• Where v is measured in meters/second, x is measured in
meters, and t is measured in seconds.
𝑣 =
𝑥
𝑡
32. • Determine whether or not the following equation is
dimensionally consistent.
• Where x is measured in meters, t is measured in seconds,
and a is measured in meters per second squared.
• Solve the above equation for a, and determine whether or
not your new equation is dimensionally consistent.
Dimensional Analysis Example 2
Δ𝑥 =
1
2
𝑎 ⋅ 𝑡2
There are many others, but the are infrequently used in this class. If need be, a reference table is on the very last page on the textbook, as well as on page 12.
Converting from one unit to another is an extremely important skill in this class. It is also an extremely easy, as long as you follow these steps:
Sample pg 14: 1,2
When attempting to convert from one unit to another, make sure your dimensions are consistent.
You cannot, for instance, convert from a measurement of length to mass.
Also, make sure the units of measurement you are using to describe your dimension match the dimension itself. In other words, if you are measuring a length, make sure your units are in meters! If not, there is most likely an error in your calculation.
It is important to note that the idea of accuracy is only applicable to an experiment where you are confirming an already known value.
Experiments that are conducted that find a new value for some quantity cannot be accurate, because there is no original value to compare to.
Answers:
1. 3
2. 5
3. 3
4. 1
5. 4
6. 7
7. 2
8. 2
Remember to point out the order of operations and how it relates to the problems
PEMDAS
Parentheses
Exponent
Multiplication
Division
Addition
Subtraction
Answers:
1. 103.2
2. 658
3. 281