You hold one end of a solid rod in a fire, and the other end becomes hot. This is an example of
a. heat conduction
b. heat convection
c. heat radiation
d. thermal expansion
e. none of the above
[Ques. 2] In a gas of different types of molecules all at the same temperature, the speeds of the heavier molecules will generally be _____________ the speeds of the lighter molecules.
a. the same as c. less than
b. greater than d. unrelated to
[Ques. 3] Temperature measures
a. how much heat is in a substance
b. the internal energy of an object
c. the average speed of atoms and molecules in a substance
d. the average kinetic energy of atoms and molecules in a substance
[Ques. 4] Which of these is stated properly?
a. The temperature of liquid nitrogen is 77 Kelvin..
b. The temperature of liquid nitrogen is 77 Kelvins..
c. The temperature of liquid nitrogen is 77 degrees Kelvin..
d. The temperature of liquid nitrogen is 77 Kelvin degrees..
[Ques. 5] Which are biggerCelsius degrees or Fahrenheit degrees?
a. Fahrenheit
b. Celsius
c. Neitherthey are the same size.
d. This is a nonsensical comparison.
[Ques. 6] The temperature scale where the numerical value is proportional to the average kinetic energy of the atoms or molecules is
a. Fahrenheit c. Kelvin
b. Celsius d. none of the above
[Ques. 7] A key is placed in a hot oven and warmed to 100C. As a result
a. the hole in the key becomes smaller
b. the key is bent into an arc
c. the key becomes longer
d. all of the above
[Ques. 8] A bimetallic strip is formed from two materials that have different
a. coefficients of linear expansion
b. heat capacities
c. calories
d. phase transitions
e. relative humidities
[Ques. 9] A device that makes use of a bimetallic strip is a
a. thermometer
b. thermostat
c. choke control in an old automobile
d. all of the above
e. none of the above
[Ques. 10] One food calorie equals
a. 1 calorie c. 1000 calories
b. 100 calories d. none of the above
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