Exam 7: Heat Transfer and Change of Phase

The higher the temperature of an object, the

The higher the frequency of a wave, the

Why does a good emitter of heat radiation appear black at room temperature?

Pigs wallow in mud mainly to

In a gaseous mixture of hydrogen and oxygen, the faster molecules on average are

Suppose you want to save energy and you're going to leave your warm house for a half hour on a cold day. You should turn the thermostat

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

We are warmed by condensation because water molecules in the air striking our bodies

When water changes to ice, water molecules

Transparency of the atmosphere is lowest for radiation of

A good absorber of radiation is a

Steam burns are more damaging than burns caused by boiling water because steam

A poor conductor of heat is a

If molecules in a sample of gas moved so they completely missed each other, the gas's temperature would

When salt is introduced to water, the temperature at which freezing occurs is

Why does a hot dog pant?

Hot water will cool to room temperature faster in a

Which requires more energy?

Both heavy and light molecules make up a sample of gas. On average, the faster molecules are the

When gases change to a liquid phase, they