24 terms

# Physics Chapter 22

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Energy transfer by convection is primarily restricted to
a. all of these
b. none of these
c. gases
d. liquids
e. fluids
f. solids
e. fluids
Which cools at the faster rate, a pt of boiling water left at room temperature or a pot of lukewarm water the same size left at room temperature?
a. the lukewarm water
b. the boiling water
c. neither-the cooling rate is the same for both
b. the boiling water
In a florist's greenhouse, glass acts as a one-way valve, letting
a. low-frequency light in and preventing high-frequency radiation from escaping
b. none of the above
c. high-frequency light in and preventing low-frequency radiation from escaping
c. high-frequency light in and preventing low-frequency radiation from escaping
infrared radiation is a form of
a. internal energy
b. microwave energy
If you were caught in freezing weather with only a candle for heat, you would be warmest in
a. tent
b. an igloo
c. a car
d. a wooden house
b. an igloo
The reason sea breezes are usually from the sea toward the land during the day is that
a. all of these
b. a high-pressure area is created high above the water
c. a low-pressure area is created just over the shore
d. land is hotter than water
e. cool air high over the ocean flows downward
a. all of these
The metallic coating on the glass surfaces of a Thermos vacuum bottle reduces the amount of energy transferred by
b. friction
c. all of these
d. none of these
e. convection
f. conduction
Materials that are poor heat conductors are insulators
True or False
True
Firewalkers who walk barefoot on red-hot wooden coals depend on
a. woods poor conductivity
b. pure chance
c. mind over matter
a. woods poor conductivity
Newtons law of cooling says that the rate of cooling depends on
a. the temperature difference between an object and its surroundings
b. the volume of an object
c. the mass of an object
d. the specific heat capacity
e. all of the above
a. the temperature difference between an object and its surroundings
Plastic foam is a good heat
a. conductor
b. insulator
c. emitter
d. absorber
b. insulator
Heat transfer by means of electrons colliding with other electrons in a metal is convection
True or False
False
The rate of cooling of an object is proportional to the temperature difference between the object and its surroundings
True or False
True
Energy transfer by convection is primarily restricted to
a. gases
b. liquids
c. solids
d.fluids
e. none of the above
d. fluids
Global warming by the greenhouse effect mostly results from the fact that an atmosphere with excess carbon dioxide is less transparent to
c. Neither of the above
A good emitter of heat is also a good reflector of heat
true or False
False
Heat transfer by conduction in metals occurs when
a. atoms give off heat in the form of electromagnetic waves
b. large numbers of atoms move from place to place
c. electromagnetic waves travel from one place to another through a vacuum
d. electrons bump into atoms and other electrons
e. none of the above
d. electrons bump into atoms and other electrons
A good reflector of heat is a poor absorber of heat
True or False
True
Planet earth loses heat primarily by
a. conduction
c. convection
d. all of these
Winds and weather patterns are good examples of radiation currents
True or False
False
The absorption effect is the name given to the process whereby long-wavelength radiation enters a house through the windows, is absorbed an reradiated by objects in the house, and is unable to be retransmitted through the windows
True or False
False
all objects above 0 K radiate energy
True or False
True
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. down 10 degrees or more
b. down a little
c. up a little
d. to room temperature
a. down 10 degrees or more
heat transfer by means of atoms moving from place to place is conduction
True or False
False