Chapter 16-Heat Transfer
A good heat conductor is
a poor insulator
The temperature of outer space is
about 2.7 kelvin
Objects that radiate relatively well
absorb radiation relatively well
A bare roof on a warmly heated home on a snowy day indicates
all of these
Energy transfer by convection is primarily restricted to
fluids
A good absorber of radiation is a
good emitter of radiation
Warm air rises because faster-moving molecules tend to move to regions of less
density and less pressure
If you were caught in freezing weather with only a candle for heat, you would be warmer in
an igloo
Steam that issues from a pressure cooker
both of these
The lower the temperature of an object, the
both of these
Which body glows with electromagnetic waves?
both the Sun and the Earth
A red-hot piece of coal will cool quicker in a
cold room
If air were a better conductor than it is, at nighttime Earth would be
considerably colder
If a volume of air is warmed, it expands and tends to
cool
If a pizza radiates more energy than it absorbs, it's temperature
decreases
If a solid object radiates more energy than it absorbs, its
internal energy decreases
Your feet feel warmer on a rug than on a tile floor because a rug
is a better insulator than tile
When an object absorbs as much as it radiates
it remains at about the same temperature
Which of these are good conductors?
none of the above
A good reflector of radiation is a
poor absorber of radiation
A form of heat transfer that doesn't depend on a medium is
radiation
In practice, a good insulator
slows heat flow
Both black and white road surfaces absorb sunlight. At the end of a sunny day the warmer road surface will be
the black surface
A water-filled paper cup held in a flame will not catch fire. This is because
the paper cup cannot become appreciably hotter than the water it contains
Waves emitted by the Sun and terrestrial wave emissions are
the same except for their frequencies and wavelengths
The higher the temperature of an object
the shorter the wavelengths it radiates
A block of wood and a block of copper will feel neither hot nor cold to the touch when they have
your temperature