Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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Convert 75°C to degrees Fahrenheit.
a. | 74°F | c. | 150°F | b. | 102°F | d. | 167°F |
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2.
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The temperature at which all molecular motion stops is
a. | 0°C. | c. | 0 K. | b. | 0°F. | d. | All of the
above |
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3.
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Convert 300 K to the Celsius scale.
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4.
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Convert 458 K to the equivalent Fahrenheit temperature.
a. | 185°F | c. | 365°F | b. | 237°F | d. | 731°F |
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5.
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A drill bit will get hot after extended use. This is because of
a. | potential energy. | c. | mechanical heating. | b. | refrigeration. | d. | solar heating. |
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6.
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Solar panels gather _____ energy from the sun.
a. | kinetic | c. | potential | b. | radiated | d. | mechanical |
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7.
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A solar heating system that utilizes an electric fan to move warm air throughout
a home is called a(n) _____ system.
a. | active | c. | convective | b. | aggressive | d. | passive |
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8.
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Evaporation causes a _____ effect.
a. | basking | c. | cooling | b. | radiation | d. | heating |
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9.
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The transfer of energy as heat caused by the collision of molecules is
called
a. | convection. | c. | contact. | b. | conduction. | d. | radiation. |
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10.
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In an air conditioner, a substance that easily evaporates and condenses is used
to transfer energy from a room to the air outside. When the substance evaporates,
a. | it absorbs energy as heat from the surrounding air. | b. | it transfers energy
as heat to the surrounding air. | c. | energy is transferred by
conduction. | d. | energy is transferred by convection. |
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11.
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The temperature of a substance increases by 3 K when 1,635 J is added to a 2 kg
quantity of the substance. What is the specific heat of the substance?
a. | 242 J/kg • K | c. | 300 J/kg • K | b. | 272 J/kg • K | d. | 817 J/kg •
K |
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12.
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The temperature of 1.5 kg of ethanol is 37°C. What will the final
temperature be if 80,000 J of energy as heat is added to the ethanol?
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13.
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Energy from the sun reaches Earth by
a. | conduction and radiation. | c. | conduction and
convection. | b. | radiation only. | d. | conduction only. |
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14.
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Convection currents rise in air because
a. | hot air rises and cold air remains stagnant. | b. | cool air descends
and hot air rises. | c. | the molecules in hot air move
faster. | d. | hot air has less friction. |
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15.
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Using the following table, determine which substance can absorb the most energy
in a temperature increase of 1 K. SPECIFIC HEATS AT 25° C
Substance | c (J/kg • K) | Substance | c (J/kg • K) | | Water (liquid) | 4,186 | Copper | 385 | | Steam | 1,870 | Gold | 129 | | Ammonia (gas) | 2,060 | Iron | 449 | | Ethanol (liquid) | 2,440 | Mercury | 140 | | Aluminum | 897 | Lead | 129 | | Carbon (graphite) | 709 | Silver | 234 | | | | |
a. | liquid water | c. | gold | b. | aluminum | d. | lead |
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16.
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What is –175°C on the Kelvin scale?
a. | 76 K | c. | 98 K | b. | 89 K | d. | 448 K |
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17.
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Temperature is
a. | associated with the sensation of hot and cold. | b. | proportional to the
average kinetic energy of molecules. | c. | measured with thermometers. | d. | All of the
above |
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18.
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The transfer of energy by the movement of fluids or gases with different
temperatures is called
a. | convection. | c. | contact. | b. | conduction. | d. | radiation. |
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19.
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Which method of energy transfer does not involve movement of matter?
a. | convection | c. | radiation | b. | conduction | d. | None of the
above |
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20.
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Which of the following substances is the best conductor of transferring energy
as heat?
a. | carbon dioxide gas | c. | iron | b. | water | d. | rubber |
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21.
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SPECIFIC HEATS AT 25° C
Substance | c (J/kg • K) | Substance | c (J/kg • K) | | Water (liquid) | 4,186 | Copper | 385 | | Steam | 1,870 | Gold | 129 | | Ammonia (gas) | 2,060 | Iron | 449 | | Ethanol (liquid) | 2,440 | Mercury | 140 | | Aluminum | 897 | Lead | 129 | | Carbon (graphite) | 709 | Silver | 234 | | | | |
Which substance listed in the table above has a specific heat
approximately 10 times greater than the specific heat of silver?
a. | water | c. | carbon | b. | ethanol | d. | mercury |
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22.
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10.0 kg of a substance underwent a 3.0 K change in temperature when 11,500 J of
energy as heat was added to the substance. What is the substance?
a. | gold | c. | copper | b. | water | d. | aluminum |
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23.
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Which of the following statements is true?
a. | Energy as heat is transferred from a lower temperature to a higher
temperature. | b. | Energy as heat is transferred from a higher temperature to a lower
temperature. | c. | The amount of heat in a closed system is a constant. | d. | Energy as heat
transferred into an object is determined by the amount of work done on the
object. |
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24.
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How much heat energy will cause the temperature of 7.0 kg of iron to increase
its temperature by 15 K? The specific heat of iron is 449 J/kg • K.
a. | 6.8 x 104 J | c. | 7.0 x 104 J | b. | 4.7 x 104
J | d. | 3.0 x 104
J |
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Matching
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Match each item to the correct statement below. a. | radiation | d. | specific heat | b. | convection | e. | insulator | c. | conduction | f. | conductor |
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25.
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a material that is a poor conductor of energy
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26.
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characteristic physical property of a substance, denoted by the letter
c
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27.
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the transfer of energy as heat through a material
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28.
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energy transferred as electromagnetic waves
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29.
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a material through which energy is easily conducted
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30.
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the movement of fluids due to density differences caused by temperature
variations
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