Physics: Chapter 16

A good heat conductor is

a poor insulator

Objects that radiate relatively well

absorbs radiation relatively well

Substances absorbs heat energy by the process of

all of these: conduction convection radiation

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

density and less pressure

The reason the sun's radiant energy is of shorter wavelengths than the Earth's is because the sun

has a higher temperature than the Earth

The planet earth loses heat mainly by

radiation

A liter of hot water will cool to room temperature faster in a

Black pot

Newtons law of cooling applies to objects that are

both of these: cooling and heating

Which body glows with electromagnetic waves?

both the sun and the earth

If air were a better conductor that it is, at night time the earth would be

considerably colder

When a volume of air is compressed, its temperature

increases

If a solid object radiates more energy than it absorbs, its

internal energy decreases

One of the main reasons one can walk barefoot on red-hot coals of wood without burning the feet has to do with

low thermal conductivity of the coals

A good reflector of radiation is a

poor absorber of radiation

The higher the temperature of an object

the shorter the wavelengths it radiates