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