Question 1

When you're ready for the hottest sips of coffee, add cream

Accepted Answer

A) right away. 
B) at any time. 
C) when you are ready to drink the coffee. 
A) right away. 
B) at any time. 
C) when you are ready to drink the coffee.

Question 2

When coal dust is spread on snow on a sunny day

Accepted Answer

A) more melting occurs. 
B) less melting occurs. 
C) no change in melting rate occurs. 
A) more melting occurs. 
B) less melting occurs. 
C) no change in melting rate occurs.

Question 3

If no molecular collisions occurred in a sample of gas, temperature of the gas would

Accepted Answer

A) increase. 
B) decrease. 
C) be unaffected. 
A) increase. 
B) decrease. 
C) be unaffected.

Question 4

Which body glows with electromagnetic waves?

Accepted Answer

A) the Sun 
B) the Earth 
C) you and your classmates 
D) all of the above 
A) the Sun 
B) the Earth 
C) you and your classmates 
D) all of the above

Question 5

A Thermos bottle has double glass walls with silver coating on the glass surfaces that face each other. The silver coating reduces energy transfer by

Accepted Answer

A) conduction. 
B) convection. 
C) radiation. 
D) all the above 
E) none of the above 
A) conduction. 
B) convection. 
C) radiation. 
D) all the above 
E) none of the above

Question 6

A good absorber of radiation is a

Accepted Answer

A) good emitter of radiation. 
B) poor emitter of radiation. 
C) good reflector. 
D) none of the above 
A) good emitter of radiation. 
B) poor emitter of radiation. 
C) good reflector. 
D) none of the above

Question 7

Which of these are good insulators?

Accepted Answer

A) feathers. 
B) wood. 
C) snow. 
D) all the above 
E) none of the above 
A) feathers. 
B) wood. 
C) snow. 
D) all the above 
E) none of the above

Question 8

In practice, a good insulator

Accepted Answer

A) stops heat flow. 
B) slows heat flow. 
C) speeds negative heat flow. 
D) all of the above 
A) stops heat flow. 
B) slows heat flow. 
C) speeds negative heat flow. 
D) all of the above

Question 9

Objects that radiate relatively well

Accepted Answer

A) absorb radiation relatively well. 
B) reflect radiation relatively well. 
C) both of these 
D) neither of these 
A) absorb radiation relatively well. 
B) reflect radiation relatively well. 
C) both of these 
D) neither of these

Question 10

On a cold day your feet feel warmer on a rug than on a tile floor because a rug

Accepted Answer

A) is usually warmer than tile. 
B) is a poorer conductor. 
C) for the same mass has more internal energy than tile. 
D) all of the above 
E) none of the above 
A) is usually warmer than tile. 
B) is a poorer conductor. 
C) for the same mass has more internal energy than tile. 
D) all of the above 
E) none of the above

Question 11

The solar constant for Earth is

Accepted Answer

A) 0.7 kW/m2. 
B) 1.0 kW/m2. 
C) 1.4 kW/m2. 
D) more than 1.4 kW/m2. 
A) 0.7 kW/m2. 
B) 1.0 kW/m2. 
C) 1.4 kW/m2. 
D) more than 1.4 kW/m2.

Question 12

A water-filled paper cup held in a flame will not catch fire. This is because

Accepted Answer

A) the inside of the paper is wet. 
B) water is an excellent conductor of heat. 
C) paper is a poor conductor of heat. 
D) the paper cup cannot become appreciably hotter than the water it contains. 
A) the inside of the paper is wet. 
B) water is an excellent conductor of heat. 
C) paper is a poor conductor of heat. 
D) the paper cup cannot become appreciably hotter than the water it contains.

Question 13

The temperature of outer space is

Accepted Answer

A) zero. 
B) about 2.7 kelvin. 
C) meaningless. 
D) none of the above 
A) zero. 
B) about 2.7 kelvin. 
C) meaningless. 
D) none of the above

Question 14

In a mixture of hydrogen gas, oxygen gas, and nitrogen gas, the molecules with the greatest average speed are those of

Accepted Answer

A) hydrogen. 
B) oxygen. 
C) nitrogen. 
D) all the same 
A) hydrogen. 
B) oxygen. 
C) nitrogen. 
D) all the same

Question 15

When an object absorbs as much as it radiates

Accepted Answer

A) it remains at about the same temperature. 
B) it is a net absorber. 
C) it is a net radiator. 
D) none of the above 
A) it remains at about the same temperature. 
B) it is a net absorber. 
C) it is a net radiator. 
D) none of the above

Question 16

Soaring birds and glider pilots can remain aloft for hours without expending power, due to

Accepted Answer

A) conduction. 
B) convection. 
C) radiation. 
D) all of the above 
A) conduction. 
B) convection. 
C) radiation. 
D) all of the above

Question 17

If you were caught in freezing weather with only a candle for heat, you would be warmer in

Accepted Answer

A) an igloo. 
B) a tent. 
C) a wooden house. 
D) a car. 
A) an igloo. 
B) a tent. 
C) a wooden house. 
D) a car.

Question 18

Terrestrial radiation is

Accepted Answer

A) emitted by Earth. 
B) emitted by the Sun. 
C) both of these 
D) neither of these 
A) emitted by Earth. 
B) emitted by the Sun. 
C) both of these 
D) neither of these

Question 19

Glass in a florist's greenhouse acts as a one-way valve in that it

Accepted Answer

A) lets light energy flow only in one direction. 
B) cuts off unwanted radiation. 
C) allows high-frequency waves in and blocks low-frequency waves exiting. 
D) is transparent only to lower-frequency waves. 
A) lets light energy flow only in one direction. 
B) cuts off unwanted radiation. 
C) allows high-frequency waves in and blocks low-frequency waves exiting. 
D) is transparent only to lower-frequency waves.

Question 20

It is commonly thought that a can of beverage will cool faster in the coldest part of a refrigerator. Knowledge of Newton's law of cooling

Accepted Answer

A) supports this common knowledge. 
B) contradicts this common knowledge. 
C) is unrelated to this common knowledge. 
A) supports this common knowledge. 
B) contradicts this common knowledge. 
C) is unrelated to this common knowledge.

Exam 16: Heat Transfer

When you're ready for the hottest sips of coffee, add cream

When coal dust is spread on snow on a sunny day

If no molecular collisions occurred in a sample of gas, temperature of the gas would

Which body glows with electromagnetic waves?

A Thermos bottle has double glass walls with silver coating on the glass surfaces that face each other. The silver coating reduces energy transfer by

A good absorber of radiation is a

Which of these are good insulators?

In practice, a good insulator

Objects that radiate relatively well

On a cold day your feet feel warmer on a rug than on a tile floor because a rug

The solar constant for Earth is

A water-filled paper cup held in a flame will not catch fire. This is because

The temperature of outer space is

In a mixture of hydrogen gas, oxygen gas, and nitrogen gas, the molecules with the greatest average speed are those of

When an object absorbs as much as it radiates

Soaring birds and glider pilots can remain aloft for hours without expending power, due to

If you were caught in freezing weather with only a candle for heat, you would be warmer in

Terrestrial radiation is

Glass in a florist's greenhouse acts as a one-way valve in that it

It is commonly thought that a can of beverage will cool faster in the coldest part of a refrigerator. Knowledge of Newton's law of cooling

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