Class vii physics waves
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This document discusses the characteristics of waves. It describes two main types of waves: transverse waves, where the medium moves perpendicular to the direction of wave motion, and longitudinal waves, where the medium moves parallel to the direction of wave motion. Key wave characteristics are defined, such as wavelength, amplitude, frequency, and velocity. The relationship between these characteristics is expressed using the wave velocity formula: velocity = wavelength x frequency. Examples are provided to demonstrate how to use this formula to calculate an unknown characteristic.
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Here are the solutions to the seatwork problems:
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The story is narrated by Jean Louise Finch, nicknamed Scout. The Finch family lives in Maycomb, Alabama during the 1930s. Atticus Finch is a widowed lawyer raising Scout and her older brother Jem. Their neighbor, Arthur "Boo" Radley, is a recluse who is rarely seen. The children are fascinated by rumors about Boo Radley and try to lure him out of his house. One day, Scout finds chewing gum and pennies that have been left for her in a tree outside the Radley place, suggesting Boo may be watching them and leaving small gifts.
Road not taken
This document provides an analysis of the poem "The Road Not Taken" by Robert Frost. It summarizes each stanza and explores symbolism in the poem. Questions are provided about the theme, metaphor, dilemma, and tone. The message of the poem is said to be that life involves continual divergences and the important thing is moving forward without looking back, as the choice made will determine one's direction in life. Background on Robert Frost and how his poems reflect rural New England is also given.
A raisin in the sun
Lorraine Hansberry wrote A Raisin in the Sun in 1959, drawing on her experiences growing up as the daughter of an activist in a segregated Chicago neighborhood. The play examines the dreams and conflicts within a black family living in poverty in 1950s Chicago through the lens of their struggle over a life insurance payout. Each family member has their own dream - Walter wants to open a liquor store, Beneatha dreams of becoming a doctor, and their mother's dream is to own a home - but tensions arise as their limited resources cannot support all of their ambitions. The play highlights themes of segregation, poverty, the value of dreams, and family dynamics within the context of the racial injustices and financial difficulties
Chapman's homer
The poem describes Keats' experience discovering the works of Homer through Chapman's translation. It compares the feeling to an astronomer discovering a new planet or Cortez staring at the vast Pacific Ocean. Reading Chapman allowed Keats to fully understand and appreciate the "pure serene" of Homer's epics for the first time. The translation revealed a new world and dimension of understanding that filled Keats with a sense of discovery and awe.
Genre, theme motif To Kill A Mocking Bird
This document discusses genre, motif, and theme in fiction. It defines genre as how fiction can be classified by content and common genres include adventure, science fiction, mystery, horror, romance, realistic fiction, and historical fiction. Motif is defined as any recurring element in a narrative that has symbolic significance, like helping to produce theme or mood. Theme is the underlying message or "big idea" an author aims to convey about life, which usually transcends cultural barriers and is universal in nature.
Class vii eng lit - to-kill-a-mockingbird-chapter-summaries
The story is narrated by Jean Louise Finch, nicknamed Scout. The Finch family lives in Maycomb, Alabama during the 1930s. Atticus Finch is a widowed lawyer raising Scout and her older brother Jem. Their neighbor, Arthur "Boo" Radley, is a recluse who is rarely seen. The children are fascinated by rumors about Boo Radley. That summer, their friend Dill arrives and encourages Jem and Scout to try interacting with Boo, which leads to frightening encounters at the Radley place.
Class vii eng lit - to-kill-a-mockingbird chapter 14 - 31 questions
These discussion points provide questions about each chapter in Harper Lee's novel "To Kill a Mockingbird". The questions probe key events in the plot, such as Tom Robinson's trial and its aftermath, as well as themes of racial injustice, loss of innocence, and the moral courage of standing up for equality.
Class vii physics - pressure
Pressure is determined by the force acting on a surface area. It depends on two factors - the force applied and the area over which that force is spread. Pressure increases with greater force or smaller surface area. In liquids, pressure is transmitted equally in all directions and increases with depth. Atmospheric pressure from gases also increases when the temperature is higher or when there is more air/gas content. Instruments like mercury barometers and manometers can be used to measure gas and liquid pressures.
Class vii blood and circulation
This document provides an overview of the circulatory system and blood. It discusses the three components of the circulatory system: blood vessels, heart, and blood. The composition of blood is described, including red blood cells, white blood cells, platelets, and plasma. Red blood cells carry oxygen and carbon dioxide using hemoglobin. There are two main types of white blood cells: lymphocytes and phagocytes, which help fight pathogens. Platelets help form blood clots to stop bleeding from cuts. Blood vessels include arteries, veins, and capillaries that transport blood throughout the body.
Pressure & its understanding
The document discusses pressure, including how it is calculated by dividing force by area. A small area results in high pressure while a large area reduces pressure. This is illustrated using examples of stiletto heels concentrating force over a small area versus boots spreading force over a larger area. Other examples show how caterpillar tracks, snowboards, and snowshoes use a large area to reduce pressure. Liquids exert pressure equally in all directions, with pressure increasing at deeper depths due to the weight of liquid above. The document also discusses how scuba divers must slowly decrease pressure or risk getting "the bends" as nitrogen leaves the blood too quickly.
Hydraulics
Hydraulics uses liquid pressure to transmit and multiply forces. A small force applied to a master piston is transmitted evenly through the liquid to exert pressure on a larger slave piston. This allows the larger slave piston to multiply the original force. Common hydraulic systems use this principle, such as car brakes which use a small brake pedal force to generate a larger braking force at each wheel through hydraulic fluid pressure. The key features of hydraulics are that pressure is transmitted evenly through the liquid and a small force can be used to create a much larger force via pistons of different sizes.
Class vii hw link - balancing equation - balance act
The document provides instructions for balancing chemical equations by ensuring the same number of atoms of each element are on both sides of the equation. It states that atoms are not created or destroyed in chemical reactions. To balance an equation, one must first determine the number of atoms of each element, then add coefficients in front of formulas as needed to make the atom counts equal on both sides. Coefficients cannot be added within formulas or change subscripts. An example problem is worked through step-by-step to demonstrate the process of balancing Mg + O2 → MgO.
The lahore resolution
The document discusses A.K. Fazlul Huq, a Bengali nationalist leader who proposed the Lahore Resolution in 1940 while serving as the chief minister of Bengal. The Lahore Resolution called for independent states for Muslims in India. However, Huq realized that the All-India Muslim League was more focused on West Pakistan, not Bengal (East Pakistan). As a Bengali nationalist, his priorities were the rural Muslim people of Eastern Bengal. After partition, he continued advocating for the people of East Bengal/East Pakistan as a politician and governor.
Water 5
The document discusses various types of water pollution including eutrophication caused by excessive nutrients, low dissolved oxygen levels, and nitrates and phosphates. Eutrophication leads to large algal blooms which can cause oxygen sags when the algae dies off. Dissolved oxygen levels depend on factors like temperature and are important for supporting aquatic life. Excess nitrates and phosphates from sources like fertilizer runoff and sewage can cause algal blooms, low oxygen, and harm fish and other aquatic animals. The document outlines these issues as well as transportation, sewage, toxic chemicals, and heavy metals as major causes and concerns of ocean pollution.
Water 4
This document provides an overview of water and irrigation. It discusses the molecular structure of water, its physical states, solvent properties, and interactions like cohesion, adhesion, surface tension, and capillary action. It also covers diffusion, osmosis, pH, plant water relations, evapotranspiration, and important irrigation principles like applying the proper amount of water based on soil type. Common irrigation methods like drip, spray, bubblers, and automatic timers are also summarized.
Water 3
This document summarizes several key water quality parameters:
- Temperature, dissolved oxygen, pH, alkalinity, hardness, turbidity, conductivity, nitrates/phosphates are discussed in 1-2 sentences each. Hardness reflects dissolved minerals and is important for drinking water standards. Nitrates and phosphates occur naturally but can increase from fertilizers and cause eutrophication.
- Hypoxia in the Gulf of Mexico is discussed as being caused by excess nutrients from the Mississippi River drainage basin leading to algal blooms and oxygen depletion.
- Possible solutions mentioned include wetland restoration, reduced fertilizer use, and reductions in emissions and soil erosion.
Water 2
Water has many unique properties due to its polar molecular structure and ability to form hydrogen bonds. These properties include high surface tension, adhesion, capillarity, high heat capacity, high heat of vaporization, and being less dense as a solid than in liquid form. Water's hydrogen bonding enables it to act as a solvent, dissolving many other polar substances and allowing important biochemical processes to occur.
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- 1. Waves I. Characteristics of Waves Waves Transverse waves Longitudinal waves Measuring waves
- 2. A. Waves Waves rhythmic disturbances that carry energy through matter or space Medium material through which a wave transfers energy solid, liquid, gas, or combination electromagnetic waves don’t need a medium (e.g. visible light)
- 3. A. Waves Two Types: Longitudinal Transverse
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- 5. B. Transverse Waves Wave Anatomy crests troughs wavelength wavelength amplitude amplitude corresponds to the amount of energy carried by the wave
- 6. C. Longitudinal Waves Longitudinal Waves (a.k.a. compressional) medium moves in the same direction as wave motion
- 7. C. Longitudinal Waves Wave Anatomy rarefaction compression wavelength wavelength Amount of compression corresponds to amount of energy AMPLITUDE.
- 8. D. Measuring Waves Frequency ( f ) # of waves passing a point in 1 second Hertz (Hz) shorter wavelength higher frequency higher energy 1 second
- 9. © Boardworks Ltd 2003 Animation to demonstrate wavelength, amplitude and frequency
- 10. D. Measuring Waves Velocity ( v ) speed of a wave as it moves forward depends on wave type and medium v = × f v: velocity (m/s) : wavelength (m) f: frequency (Hz)
- 11. WORK: v = × f v = (3.2 m)(0.60 Hz) v = 1.92 m/s D. Measuring Waves EX: Find the velocity of a wave in a wave pool if its wavelength is 3.2 m and its frequency is 0.60 Hz. GIVEN: v = ? = 3.2 m f = 0.60 Hz v f
- 12. WORK: f = v ÷ f = (5000 m/s) ÷ (417 m) f = 12 Hz D. Measuring Waves EX: An earthquake produces a wave that has a wavelength of 417 m and travels at 5000 m/s. What is its frequency? GIVEN: = 417 m v = 5000 m/s f = ? v f