Physics Chapter 10 Conceptual

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The more energetic molecules are able to escape the liquid

Evaporation is a cooling process because

At high temperatures

Heat engines, such as an automobile engine, are more efficient when run

Expands

If a volume of air is warmed, it

Considerably colder

If air were a better conductor than it is, at nighttime the earth would be

Radiation

If you hold your hands to one side of a flame, the predominant form of heat transfer that you will experience is

81 times faster

If you triple the absolute temperature of an object, it will radiate

Yes, But work will have to be done

Is it possible to transfer heat ffrom a cold reservoir to a hot reservoir?

Looseness of outer electrons in metal atoms

Metals are both good heat conductors and also good electrical conductors because of the

Absorb radiation very well

Objects that radiate relatively well

Equals the difference between its heat intake and heat exhaust

The work output of a perfectly constructed heat engine

Density and pressure

Warm air rises because faster moving molecules ten to move to regions of less

Expands

What happens to a given mass of water when cooled between 4 and 0'C?

Density increases

What happens to water when heated from 0'C to 4'C?

Density increases

What happens to water when its temperature is reduced from 12'C to 4'C?

Heat energy enters the substance

When a vapor condenses

Heat energy enters the substane

When vapor condenses

Decreases

When water freezes, the entropy of the water

Heat necessary to vaporize 1 kg of boiling water

Which heat is greatest?

Stationary Air

Which material is a good thermal insulator?

Fluids

Energy transfer by convection is primarily restricted to

A poor insulator

A good heat conductor is a

Conduction, convection, and radiation. A

A substance can absorb heat energy by the process of

Involves no net heat entering or leaving a system

An adiabatic process

Becomes more diluted

As entropy of a system increases, energy in the system

4 Degree Celcius

At what temperature is water most dense?

We remove water vapor above the coffee so that further evaporation is enhance

By blowing on a cup of hot coffee

conduction

By what primary heat transfer mechanism does one end of a metal spoon become hot when the other end is placed in boiling water

In liquids and gases

Convection can occur

in liquids and gases

Convection can occur

Air contains as many water molecules as it can contain at a given temperature

Saturation occurs in air when the

Disorder in the universe is increasing with the passage of time

The second law of thermodynamics leads us to conclude that

Radiation

The silver coating on the glass surfaces of a thermos bottle reduces energy that is transferred

Conduction and convection

The space between the inner walls of a thermos bottle evacuated to minimize heat transfer by

Conduction and convection

The space between the inner walls of a thermos bottle is evacuated to minimize heat transfer by

Water expands upon freezing while the metal contracts at lower temperatures

Which one of the following statements is the best explanation for the fact that metal pipes that carry water often burst during cold winter months?

Is a better thermal insulator than tile

Your feet feel warmer on a rug than on a tile floor because the rug


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