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Physics

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Physics Old Free Response

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Physics
Classical mechanics
Introductory physics
Force
Elevator
Mass
Metre per second squared
Friction
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Physics

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.

BIO-SAVART LAW

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BIO-SAVARTLAW PROBLEMS AND SOLUTIONS

Creating Fields: Biot-Savart Law Challenge Problems Problem 1: Find the magnetic field at point P due to the following current distributions: (a) (b) Problem 2: A conductor in the shape of a square loop of edge length ? = 0.400 m carries a current I = 10.0 A as in the figure. (a) Calculate the magnitude and direction of the magnetic field at the center of the square. (b) If this conductor is formed into a single circular turn and carries the same current, what is the value of the magnetic field at the center? Problem 3: A wire is bent into the shape shown on the right, and the magnetic field is measured at P1 when the current in the wire is I. a b c d From the discussion given in Example 9.1

DC CIRCUITS PROBLEMS AND SOLUTIONS

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DC CIRCUITS

DC Circuits Challenge Problems Problem 1: A battery of emf ? has internal resistance iR , and let us suppose that it can provide the emf to a total charge Q before it expires. Suppose that it is connected by wires with negligible resistance to an external (load) with resistance LR . a) What is the current in the circuit? b) What value of LR maximizes the current extracted from the battery, and how much chemical energy is generated in the battery before it expires? c) What value of LR maximizes the total power delivered to the load, and how much energy is delivered to the load before it expires? How does this compare to the energy generated in the battery before it expires?

AMPERS LAW PROBLEMS AND SOLUTIONS

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AMPERES LAW

Creating Fields: Ampere?s Law Challenge Problems Problem 1: The sketch below shows three wires carrying currents 1I , 2I and 3I , with an Amp?rian loop drawn around 1I and 2I . The wires are all perpendicular to the plane of the paper. Which currents produce the magnetic field at the point P shown in the sketch (circle one)? a) 3I only. b) 1I and 2I . c) 1I , 2I and 3I . d) None of them. e) It depends on the size and shape of the Amperian Loop. Problem 2: Find the magnitude and direction of the magnetic field at the point P generated by the current carrying wire and loop depicted in the figure. Problem 3: The figure below shows two closed paths wrapped around two conducting loops carrying

chapter 1 thermodunamics

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Chapter 1 Fundamentals of Thermodynamics This chapter ?rstly looks back on the development of macroscopic thermo- dynamics during the last three hundred years and its historical contribution to the social evolvement. The present achievement and challenges are also discussed. To clearly understand the thermodynamic laws, the essential con- cepts of thermodynamics are de?ned and clari?ed. Further, the macroscopic thermodynamics of materials and the fundamental principles of four ther- modynamics laws are introduced, which are the essential basis of the later chapters. The intrinsical relationships between these thermodynamics laws through a series of mathematical deductions are given, which additionally re- sult in the acquirement of the most important physical amounts of materials.

quantum physics

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quantum physics has a quamtum theory.

1) it is physically impossable to know both the location (position) and the momentum at the same time

2) the atomic world is nothing like the world we live in

 

chapter 3 notes and vocab

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Notes and vocab Chapter 3 Projectile motion Throw a baseball and the path it follows is a curve. This curve is a combination of constant-velocity horizontal motion and accelerated vertical motion. It is a nonlinear motion-motion along a curved path. Vector and scalar quantities Pictures are powerful tools. Vector quantity: A quantity that requires both magnitude and direction for a complete description. Velocity differs from speed in that velocity includes direction in its description. Velocity is a vector quantity, as is acceleration. A quantity that can be added, subtracted, multiplied and divided like ordinary numbers are scalar quantity. Scalar quantity is completely described by magnitude only. Velocity Vectors

chapter 4 notes and vocab

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Notes and Vocab Chapter 4 Soros Notes: In general, we say the cause of the boulder?s motion is a force of some kind. We know that something forces the boulder to begin moving. Aristotle on motion: The idea that a force causes motion goes back to the fourth century, Aristotle, the foremost Greek scientist, studied motion and divided it into two types: natural motion and violent motion. Aristotle thought it is nature for heavy things to fall and for very light things to rise. Aristotle proclaimed circular motion was natural for the heavens. There are no thought that these motion to be cause by forces.

AP Physics

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Mechanics

KEY CONCEPTS KINEMATICS 1. MOTION IN ONE DIMENSION Kinematics is the study of how objects move, and the formal description of that motion. Kinematics doesn?t concern the forces that cause the motion or the masses involved. Instead it addresses such questions as: How far does an object move? How long does it take? How fast is it moving? The relevant quantities in kinematics are displacement, time, velocity, and acceleration. Displacement is related to the distance an object moves, displacement measures the change in position and is written as ?x. Time is denoted either as t, a specific moment in time, or as ?t, the time interval over which some event occurs. Velocity refers to how fast an object is moving and in what direction. The magnitude of

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