# Physics Chapter 17

20 Questions

Quiz for chapter 17

• 1.
Wrapping a hot potato in aluminum foil significantly reduces the rate at which it cools by
• A.

Conduction

• B.

Condensation

• C.

Evaporation

• D.

Melting

• 2.
The molecules in a room-temperature glass of water jostle around at
• A.

A great variety of speeds

• B.

Much the same rates of speed

• C.

A very small range of speeds

• 3.
Evaporation is a cooling process and condensation is
• A.

A warming process

• B.

A cooling process also

• C.

Neither a warming nor cooling process

• 4.
Evaporation is a cooling process because
• A.

Heat is radiated during the process

• B.

Of conduction and convection

• C.

The more energetic molecules are able to escape the liquid

• D.

The temperature of the remaining liquid decreases

• 5.
To say that evaporation is a cooling process is to say that the
• A.

More energetic particles escape

• B.

More energetic particles remain in the water

• C.

The less energetic particles escape

• 6.
A hot dog pants
• A.

To help evaporation occur in its mouth and bronchial tract

• B.

To bring more oxygen into its lungs

• C.

For no particular reason - some things just happen

• D.

To impress dogs of the opposite sex

• 7.
Steam burns are more damaging than burns caused by boiling water because steam
• A.

Gives up additional energy when it condenses

• B.

Has more energy per kilogram than boiling water

• C.

Choices A and B are both correct

• D.

Choices B and C are both incorrect

• 8.
• A.

Evaporating from our moist bodies

• B.

Condensing on our bodies

• C.

Evaporating and condensing on our bodies at the same rate

• 9.
We are warmed by condensation because water molecules in the air that strike our bodies
• A.

Transfer some of their kinetic energy to us

• B.

Gain kinetic energy as they change state

• C.

Form an insulating layer on our bodies

• 10.
When a gas is changed to a liquid state, the gas
• A.

Releases energy

• B.

Absorbs energy

• C.

Neither releases nor absorbs energy

• D.

Both releases and absorbs energy

• 11.
When a solid is changed to a liquid state, the solid
• A.

Releases energy

• B.

Absorbs energy

• C.

Neither releases nor absorbs energy

• D.

Both releases and absorbs energy

• 12.
When liquids change to a solid state, they
• A.

Absorb energy

• B.

Release energy

• C.

Neither absorb nor release energy

• D.

Both absorb and release energy

• 13.
Which could burn a boy scout the most?
• A.

100 g of water at 100 degrees C

• B.

100 g of steam at 100 degrees C

• C.

Both would be equally damaging

• 14.
When heat is added to boiling water, its temperature
• A.

Increases.

• B.

Decreases.

• C.

Does not change.

• 15.
Boiling water does not increase in temperature when additional heat is applied because
• A.

The temperature doesn't change in a change of state

• B.

Added input energy doesn't increase the water's internal energy

• C.

The increased heating produces increased boiling, and therefore increased cooling

• D.

None of these

• 16.
For increased atmospheric pressure, the boiling temperature of a liquid
• A.

Goes down

• B.

Goes up

• C.

Remains at 100 degrees C

• 17.
Increased air pressure on the surface of hot water tends to
• A.

Prevent boiling

• B.

Promote boiling

• C.

Neither choice A nor choice B is true

• D.

Choice A and choice B are both true

• 18.
Near the top of a mountain, water in an open pot boils at
• A.

A higher temperature than at sea level

• B.

A lower temperature than at sea level

• C.

The same temperature as at sea level

• D.

None of the above choices are true

• 19.
The food in a refrigerator is cooled by
• A.

Vaporization of the refrigerating fluid

• B.

Condensation of the refrigerating fluid

• C.

The ice in your nearby freezer

• 20.
You can briefly touch a hot clothes iron with a bare wet finger because the wetness
• A.

Choices C and D are both true

• B.

Only Choice C is true

• C.

Absorbs energy in vaporizing

• D.

Provides an insulating layer after it changes state

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