When ice melts, its temperature
a. increases. b. decreases.
c. stays constant. d. cannot be determined.
[Ques. 2] The specific heat capacity of copper is three times the specific heat capacity of lead. Equal masses of copper and lead are heated from room temperature to the temperature of boiling water. To achieve this, the amount of heat added to the copper is ___________ the amount of heat added to the lead.
a. 1/9
b. 1/3
c. equal to
d. 3 times
e. 9 times
[Ques. 3] The coefficient of linear expansion of ordinary glass is three times that of Pyrex glass. An ordinary glass rod and a Pyrex glass rod of equal lengths at room temperature are dropped into boiling water. The change in length of the ordinary glass rod will be ___________ the change in length of the Pyrex glass rod.
a. 1/9
b. 1/3
c. equal to
d. 3 times
e. 9 times
[Ques. 4] The change in size of an object due to thermal expansion depends upon
a. what the object is made of.
b. the object's original size.
c. how much the temperature changes.
d. A and C.
e. all of the above.
[Ques. 5] The total kinetic and potential energies of all the atoms and molecules of a substance is its
a. heat.
b. internal energy.
c. temperature.
d. thermodynamics.
e. none of the above
[Ques. 6] A hot pizza contains
a. heat.
b. internal energy.
c. temperature.
d. work.
e. none of the above.
[Ques. 7] The amount of heat energy a refrigerator removes from the food stored inside it is ___________ the amount of electrical energy required to run the refrigerator.
a. equal to b. greater than
c. less than d. unrelated to
[Ques. 8] An example of a heat mover is
a. a refrigerator.
b. an air conditioner.
c. a heat pump.
d. all of the above.
e. none of the above.
[Ques. 9] A bimetallic strip is usable as a thermometer because of
a. heat conduction.
b. heat convection.
c. heat radiation.
d. thermal expansion.
e. none of the above.
[Ques. 10] Firewalkers step on the hot ashes and coals from a wood fire without getting their feet burned. How might this be possible?
a. They have magical powers.
b. The ashes are poor conductors of heat.
c. They do get burned but enjoy the publicity.
d. none of the above
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