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Question 1
2 out of 2 points
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.
Selected
Answer:
b.
less
than
Question 2
2 out of 2 points
A key is placed in a hot oven and warmed to 100°C. As a result
Selected
Answer:
c.
the key becomes
longer.
Question 3
2 out of 2 points
A piece of chocolate melts in your mouth. This is an example of
Selected
Answer:
a.
heat
conduction.
Question 4
2 out of 2 points
The temperature of a gas can be increased by
Selected
Answer:
d.
all of the
above.
Question 5
2 out of 2 points
A bimetallic strip is formed from two materials that have different
Selected
Answer:
d.
coefficients of linear
expansion.
Question 6
2 out of 2 points
In a steam engine, steam at 140°C in a turbine does work on an
external system, and the steam leaves the turbine at 100°C. The
efficiency of the steam engine is 5%. The relevant physical
principle is
Selected
Answer:
b.
the second law of
thermodynamics.
Question 7
2 out of 2 points
The lunar surface cools after the Sun sets. This is an example of
Selected
Answer:
c.
heat
radiation.
Question 8
2 out of 2 points
Which mechanism(s) of heat transfer will work in a vacuum?
Selected
Answer:
c.
radiatio
n
Question 9
2 out of 2 points
An example of a heat mover is
Selected
Answer:
d.
all of the
above.
Question 10
2 out of 2 points
Temperature measures
Selected
Answer:
c.
the average kinetic energy of atoms and molecules
in a substance.
Question 11
2 out of 2 points
A device that makes use of a bimetallic strip is
Selected
Answer:
d.
all of the
above.
Question 12
2 out of 2 points
Which are bigger—Celsius degrees or Fahrenheit degrees?
Selected
Answer:
d.
Celsi
us
Question 13
2 out of 2 points
The warmth you feel from the Sun at the beach is an example of
Selected
Answer:
c.
heat
radiation.
Question 14
2 out of 2 points
As long as there is ice in your drink, the temperature of the ice remains
near
Selected
Answer:
a.
zero Celsius.
Question 15
2 out of 2 points
The efficiency of a heat engine
Selected
Answer:
d.
all of the
above
Question 16
2 out of 2 points
A piston compresses a gas, while at the same time heat is lost to
the surroundings. The temperature of the gas rises. This is
governed by the second law of thermodynamics.
Selected
Answer:
Fals
e
Question 17
2 out of 2 points
A refrigerator is an example of a heat mover.
Selected
Answer:
Tru
e
Question 18
2 out of 2 points
As the air cools at night the relative humidity usually drops.
Selected
Answer:
Fals
e
Question 19
2 out of 2 points
A bimetallic strip is formed from two materials that have different
heat capacities.
Selected
Answer:
Fals
e
Question 20
2 out of 2 points
The dew point is the temperature at which a given humidity equals the saturation density.
Selected
Answer:
Tru
e
Question 21
2 out of 2 points
specific heat capacity of ice = 2,000 J/kg-°C
latent heat of fusion of water = 334,000 J/kg
specific heat capacity of water = 4,000 J/kg-°C
As the ice is melting, the temperature of the ice-water mixture
rises by 10°C.
Selected
Answer:
Fals
e
Question 22
2 out of 2 points
Celsius degrees are larger than Fahrenheit degrees.
Selected
Answer:
Tru
e
Question 23
2 out of 2 points
When ice melts, its temperature increases.
Selected
Answer:
Fals
e
Question 24
2 out of 2 points
One “food calorie” equals 1000 calories.
Selected
Answer:
Tru
e
Question 25
2 out of 2 points
Heat is transferred from a substance if it is exposed to something
that has a lower temperature.
Selected
Answer:
Tru
e
Question 26
15 out of 15 points
Select the closest matching pairs possible. 3 pts for each response.
Question Selected Match
Liquids C.
Similar to solid material but they do not hold
their shape
Linear Thermal
Expansion
D.
Depends on the length of material, type of
material, and the change in temperature
Kelvin Temperature B.
Proportional to the average kinetic energy of the
particles in a material
Entropy E.
Is a measure of disorder in a system
The First Law of
Thermodynamics
A.
The internal energy of a substance equals the
work done on it plus the heat transferred to it
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