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Introductory physics

ideal gas law

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Chemistry
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ideal gas law

IDEAL GAS LAW THE REALTIONSHIP PV=nRT describes THE BEHAVIOR OF AN IDEAL GAS. (PRESSURE*VOLUME=#MOLES*R VALUE*TEMPERATURE)
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Kinetic Molecular Theory

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Kinetic Molecular Theory All matter is composed of small particles. Particles of matter are in constant motion. Particle collisions are elastic. (No transfer of energy/loss of energy in a collision) Gases only: Volume of each gas particle is negligible compared to the volume of the sample. Particles of gases exert no forces of attractions on each other. (This is due to the great distance between molecules.) Ideas of KMT explain ideal gas behavior. Deviations of ideal gas behavior occur among real gases because real gases do have volume and IMF?s. Deviations are minimized under conditions of low pressure and high temperature (PLIGHT) Hydrogen and helium behave most like ideal gases due to their small size and very weak IMFs.

Work and Power

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Work and Power Scientific Work Energy can be transferred into or out of a system by work Work: a measure of energy transferred into or out of a system by a force (F) acting over a distance(d) Work needs 3 key ingredients: force, displacement, and cause Work is only done when force acts upon an object to cause a displacement of the object Work is only done when components of a force are parallel to the object?s displacement Examples: a teacher applying a force to a wall becomes exhausted NOT WORK no displacement A book falls off a table and free falls to the ground NOT WORK no force to cause displacement a rocket accelerates through space WORK A force causes a displacement

Physics Old Free Response

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Force
Elevator
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Metre per second squared
Friction
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SHS AP QUIZ 8 KEY 1976 B1 The two guide rails for the elevator shown above each exert a constant friction force of 100 newtons on the elevator car when the elevator car is moving upward with an acceleration of 2 meters per second squared. The pulley has negligible friction and mass. Assume g = 10 m/sec2. (a) On the diagram below, draw and label all forces acting on the elevator car. Identify the source of each force. (b) Calculate the tension in the cable lifting the 400-kilogram elevator car during an upward acceleration of 2 m/sec2. (Assume g 10 m/sec2.) (c) Calculate the mass M the counterweight must have to raise the elevator car with an acceleration of 2 m/sec2.

German

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World History
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German


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Name: ______________________________________ Date: ________________________ Student Exploration: Free-Fall Laboratory Vocabulary: acceleration, air resistance, free fall, terminal velocity, velocity, vacuum Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 1. Suppose you dropped a feather and a hammer at the same time. Which would hit the ground first? _______________________________________________________________ 2. Imagine repeating the experiment in an airless tube (vacuum). Would this change the

Newton Second Law

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Newtons Second Law
Newton was the first to mathematically express the relationship between force and momentum. Some physicists interpret Newton's second law of motion as a definition of force and mass, while others consider it to be a fundamental postulate, a law of nature. Either interpretation has the same mathematical consequences, historically known as "Newton's Second Law": The quantity mv is called the (canonical) momentum. The net force on a particle is thus equal to rate change of momentum of the particle with time. Since the definition of acceleration is a = dv/dt, the second law can be written in the simplified and more familiar form:
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