 January 2002, Part 4
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61  The diagram below represents the path of Earth around the Sun. As Earth travels in its orbit from its January position to its July position, the potential energy of Earth (1) decreases and its kinetic energy decreases
(2) decreases and its kinetic energy increases
(3) increases and its kinetic energy decreases
(4) increases and its kinetic energy increases

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Base your answers to questions 62 and 63 on the information and diagram below. A golf ball leaves a golf club with an initial velocity of 40.0 meters per second at an angle of 40.o with the horizontal. 62  What is the vertical component of the golf ball’s initial velocity?

(1) 25.7 m/s
(2) 30.6 m/s
(3) 40.0 m/s
(4) 61.3 m/s

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63  What is the total horizontal distance traveled by the golf ball during the first 2.50 seconds of its flight?

(1) 100. m
(2) 76.6 m
(3) 64.3 m
(4) 40.0 m

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64  What is the period of orbit of a communications satellite in geosynchronous orbit about Earth?

(1) 1 year
(2) 24 hours
(3) 12 hours
(4) 60 minutes

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65  The table below gives information about the Moon and a satellite orbiting Earth.  1 2 3 4
Group 2 — Internal Energy
If you choose this group, be sure to answer questions 66–75.

66 The diagram below represents an experiment in which a student placed a 0.030-kilogram lead cube in a beaker of water at 20.°C and then heated the beaker until the water began to boil. The maximum amount of heat absorbed by the lead cube during the experiment was approximately (1) 0.31 kJ
(2) 10. kJ
(3) 60. kJ
(4) 790 kJ

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67  Absolute zero is best described as the temperature at which

(1) water freezes at standard pressure
(2) water is at its triple point
(3) the molecules of a substance have maximum kinetic energy
(4) the molecules of a substance have minimum kinetic energy

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68  A temperature change of 20. Celsius degrees is equal to a temperature change of

(1) 20. Kelvins
(2) 120. Kelvins
(3) 253 Kelvins
(4) 293 Kelvins

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69  Heat will always flow from object A to object B if object B has a lower

(1) mass
(2) total energy
(3) temperature
(4) specific heat

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70  Equal amounts of heat energy are given off by 1.0-kilogram samples of aluminum, iron, platinum, and zinc, all initially at 100.°C. Which sample has the greatest decrease in temperature?

(1) aluminum
(2) iron
(3) platinum
(4) zinc

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71  The graph below shows the temperature of 3.0 kilograms of a pure substance initially in the solid phase as heat is added to it at a constant rate. The substance is most likely (1) alcohol
(2) silver
(3) copper

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72  As a large quantity of salt is added to a container of boiling water, the water

(1) stops boiling because the boiling point decreases
(2) stops boiling because the boiling point increases
(3) boils faster because the boiling point decreases
(4) boils faster because the boiling point increases

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73  The total effect of all the processes that occur in the universe is an increase in

(1) entropy
(2) temperature
(3) order
(4) energy

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74  Which graph best represents the relationship between volume V and absolute temperature T for a fixed mass of an ideal gas at constant pressure? 1 2 3
Note that question 75 has only three choices.

75  As the pressure of a fixed mass of gas is increased at constant temperature, the density of that gas

(1) decreases
(2) increases
(3) remains the same

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Group 3 — Electromagnetic Applications
If you choose this group, be sure to answer questions 76–85.

76  If the current in an ammeter’s coil is doubled, the resulting torque on the coil will be

(1) unchanged
(2) doubled
(3) halved

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77  An operating electric motor induces an EMF in the armature that opposes the applied potential difference. This phenomenon is an example of conservation of

(1) inertia
(2) electric charge
(3) momentum
(4) energy

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78  The rate of thermionic emission from a surface increases as the surface’s

(1) temperature decreases
(2) thickness decreases
(3) temperature increases
(4) thickness increases

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79  An electron moves at 2.0 × 106 meters per second perpendicular to a magnetic field having a flux density of 2.0 teslas. What is the magnitude of the magnetic force on the electron?

(1) 1.0 × 10–6 N
(2) 6.4 × 10–13
(3) 3.6 × 10–24 N
(4) 4.0 × 106 N

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80 The Millikan oil drop experiment determined the smallest unit of

(1) mass
(2) weight
(3) electric charge
(4) electric field strength Additional Tests
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