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1. The specific heat for substance A is twice the specific heat of substance B. The same mass of each substance is allowed to gain 50 Joules of heat energy. As a result of the heating process
A. the temperature of A rises twice as much as B.B. the temperature of A rises four times as much as B.C. the temperature of B rises twice as much as A.D. the temperature of B rises four times as much as A.E. the temperature of both B and A rise the same amount.
2. A golf ball is placed inside an unmounted tire, which is then rolled down a long hill. Identify the statement(s) that best describe the situation while the tire and golf ball are rolling down the hill.
I. The centripetal force on the tire operates in the same direction as the centripetal force on the golf ball.
II. The centripetal force acting on the tire is opposite the centripetal force acting on the golf ball.
III. The centripetal force acting on the golf ball is equal to the centripetal force on the tire.
A. I onlyB. II onlyC. I and III onlyD. II and III onlyE. I, II, and III
3. A 50 kg block slides down a plane that has been raised to an angle of 30° above the horizontal at a constant rate. After the block slides completely to the bottom of the plane, a rope is attached to the block. The rope pulls parallel to the surface of the plane as the block is pulled up the plane at a constant rate. Which statement about the tension in the rope is correct?
A. The tension in the rope is greater than the frictional force but less than the weight of the block.B. The tension in the rope is greater than the frictional force plus the weight of the block.C. The tension in the rope is equal to the weight of the block minus the frictional force.D. The tension in the rope is equal to the weight of the block.E. The tension in the rope is equal to the frictional force.
4. The length of time a satellite takes to orbit the earth depends on its
A. launch speed.B. mass.C. distance from the earth.D. weight.E. orbital direction.
5. An object falls with constant acceleration near the earth. Which statement best describes the velocity of the object?
A. The velocity is constant.B. The velocity is decreasing.C. The velocity constantly changes in proportion to its weight.D. The velocity is not related to its acceleration.E. The velocity changes by the same amount each second.
6. The normal force between two surfaces is increased by four times. The coefficient of static friction will
A. be cut in half.B. be doubled.C. remain the same.D. be quadrupled.E. be undetermined.
7. Which of the following methods can be used to induce a voltage into a coil of wire?
A. Rotating a magnet around the coils of wireB. Passing a magnet through the center of the coils of wireC. Rotating the coil of wire in a magnetic fieldD. Changing the strength of the magnetic field applied to the wireE. All of the methods listed can be used to induce current into a coil of wire.
8. Scientists identify the elements that are burning in the stars by using which of the following devices?
A. Refractive telescopesB. Reflective telescopesC. SpectroscopesD. PolarimetersE. Photoelectric microscopes
9. The discrete spectral lines of line spectra occur when excitation of electrons takes place in
A. solids.B. liquids.C. gases.D. plastics.E. all of these.
10. A proton and an electron are each placed in an electric field between a pair of parallel plates. The electron is placed exactly halfway between the two plates, and the proton is placed midway between the electron and the negative plate. Which of the following statements is correct about the forces the particles experience?
A. The force on the electron is larger because it has less mass.B. The force on the proton is larger because it has greater massC. The force on the electron is larger because it is in the strongest part of the electric field.D. The force on the proton is larger because it is closer to the negative plate.E. They both experience the same force.
11. A light ray that enters a glass block from the air is refracted because
A. the light travels faster in the glass than in the air.B. the light travels slower in the glass than in the air.C. the light waves invert as they enter the glass.D. the light waves increase their amplitudes in the glass.E. the light intensity is greater in the glass than in the air.
12. Each and every person on earth is made of atoms that originated in
A. the food we eat.B. the ancient stars.C. our mother's body.D. the oceans.E. the earth.
13. A toy rocket is launched straight up. At the exact top of its flight path, which of the following is true?
A. Its velocity and acceleration are zero.B. Its velocity is zero and acceleration is 9.8 m/s2.C. Its velocity is 9.8 m/s and acceleration is 9.8 m/s2.D. Its velocity is 9.8 m/s and acceleration is zero.E. Its velocity is 9.8 m/s and displacement is 9.8 m.
14. Sir Isaac Newton's third law of motion is called the action-reaction law. Which of the following statements appropriately describes the action-reaction forces?
A. They act on different objects.B. They act on the same object.C. They are unequal in magnitude.D. They act at right angles to one another.E. They act in the same direction.
15. When a gas undergoes an adiabatic compression its
A. temperature decreases.B. temperature increases.C. volume increases.D. pressure decreases.E. energy decreases.
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