ch 7

coffee is served at a restaurant before you are ready to drink it. to be hottest when you are ready to drink it, you should add cream

right away

to save the most energy when you leave your cool house for an hour or so on a hot day, you should turn the temperature setting on the air conditioner

up

because of trapped air inside, snow is a

both of these

if an object radiates more energy than it absorbs, its

both of these

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

both of these

conduction has most to do with electrons and atoms

bumping into one another

a red-hot piece of iron will cool slower in a

cold room

in terms of transferring heat, red-hot wooden coals

conduct poorly

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

considerably colder

coastal winds that shift from night to day illustrate

convection

blow in your hand and feel the warmth of your breathe. pucker you're lips so your breath expands as you blow and your breath is

cool

newton's law of cooling applies to things that are

cooling

hot steam that issues from a pressure cooker expands and

cools

if a volume of air is warmed, it expands. if a volume of air expands, it

cools

a star that is twice as hot as another has twice the

fahrenheit temperature

Compared to a glass of ice water with ice in it, a glass of plain ice-cold water without ice on a warm day will warm up

faster

the process of convection occurs in

fluids

a good absorber of radiation is a

good emitter of radiation

a poor conductor of heat is a

good insulator

radiant energy from the sun is composed of shorter wavelengths than radiation from the earth because the sun

has a higher temperature than the earth

a piece of pizza is normally a net radiator of energy when its temperature is

higher than its surroundings

an apple pie will be a net of emitter of energy when it's temperature is

higher than its surroundings

the higher the temperature of an object, the

higher the frequency of emitted radiation

if a pizza absorbs more energy than it emits, its temperature

increases

when air is compressed, its temperature

increases

your bare feet feel warmer on a rug than on a tile floor because the rug

is a better insulator than tile

the average frequency of radiant energy is directly proportional to the

kelvin temperature of the emitter.

metals are both good heat and electrical conductors due to

looseness of outer electrons in metal atoms

the main reason you can walk barefoot on red-hot coals of wood without burning your feet involves

low conductivity of the coals

a blueberry pie will be a net absorber of energy when its temperature is

lower than its surroundings

if an object absorbs more energy than it emits, it's

none of the above

which of these are good conductors

none of the above

an infrared thermometer operates by way of

none of these

when you leave your warm house for an hour or so on a cold day, to save energy you should turn the thermostat

off

a good reflector of radiation is a

poor absorber of radiation

spun glass is a relatively

poor conductor

a photovoltaic cell receives energy input primarily by

radiation

a substance most commonly emits heat energy by the process of

radiation

the silver lining on the glass surfaces of a Thermos bottle reduces energy that is transferred by

radiation

which emits radiation of the highest frequency

a blue-hot star

a good heat conductor is

a poor insulator

the gush of steam that issues from the escape valve of a pressure cooker is relatively cool

above the opening where vapor is visible

the pupil of your eye is a net

absorber of radiant energy

a bare roof on a warmly heated home on a snowy day indicates

all of the above

heat radiation relates mainly to

all of the above

radiant energy emitted by our planet is

all of the above

which body continually emits electromagnetic waves?

all of the above

which of these are good insulators

all of the above

wood is a poor conductor

all of the above

if you were caught in freezing weather with only a candle for heat, you would be warmer in

an igloo

cold water will warm to room temperature faster in a

black pot

hot water will cool to room temperature faster in a

black pot

the higher the temperature of an object, the

shorter the wavelengths it radiates

the higher the frequency of a wave, the

shorter wavelength

to minimize heat loss it is best that a teapot be

silver

in practice, a good insulator

slows heat flow

it's commonly thought that a can of beverage will cool faster in the coldest parts of a refrigerator. knowledge of newton's always of cooling

supports this

peak frequency as noted on a radiation curve is directly proportional to the

temperature of the emitter

a watermelon will cool faster when placed in what part of a refrigerator

the freezer compartment

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

the paper cup cannot become appreciably hotter than the water it contains

convection currents in the air near a seashore are produced by

unequal heating of land and water

when you touch a nail stuck in ice, energy flows from

your hand to the ice

a block of wood and a block of copper will feel neither hot nor cold to the touch when they each have

your temperature