Transcript Document

16.1
16.2
Conduction
Convection
16.3
Convection
16.4
Radiation
16.5
Radiation
16.6
Radiation
16.7
Radiation
16.8
Radiation
16.9
Minimize
• Conduction
• Convection
• Radiation
16.10
-- Questions -MULTIPLE CHOICE.
Choose the one alternative that
best completes the statement or
answers the question.
16.11
1) Cold water will warm to room temperature faster in a
A) black pot.
B) silver pot.
C) depends more on the size of the pots than their color.
2) Metals are both good heat conductors and good electrical conductors
because of the
A) looseness of outer electrons in metal atoms.
B) high elasticity of metals.
C) relatively high densities of metals.
D) similarity between thermal and electrical conductive properties.
E) ability of metals to transfer energy easily.
16.12
3) The reason the sun's radiant energy is of shorter wavelengths than the
Earth's is because the sun
A) has a higher temperature than the Earth.
B) has much more internal energy.
C) is an energy source while the Earth is primarily an energy
receiver.
D) all of these.
E) none of these.
4) Objects that radiate relatively well,
A) absorb radiation relatively well.
B) reflect radiation relatively well.
C) both of these.
D) neither of these.
16.13
5) If a solid object radiates more energy than it absorbs, its
A) temperature decreases.
B) internal energy decreases.
C) both of these.
D) neither of these.
6) At the same temperature, which move with the greater speed in the
air?
A) very light molecules
B) heavier molecules
C) All will have equal average speeds.
16.14
7) A good reflector of radiation is
A) poor absorber of radiation.
B) good absorber of radiation.
C) good emitter of radiation.
D) none of these.
8) The higher the temperature of an object, the
A) longer the wavelengths it radiates.
B) shorter the wavelengths it radiates.
16.15
9) Increase the pressure in a container of oxygen gas while keeping the
temperature constant and you increase the
A) molecular kinetic energy.
B) molecular speed.
C) both of these.
D) neither of these.
10) When a volume of air is compressed, its temperature
A) neither increases nor decreases.
B) decreases.
C) increases.
16.16
11) If molecules in a gas sample moved so they completely missed each
other, the gas's temperature would
A) decrease.
B) stay the same.
C) increase.
12) One of the main reasons one can walk barefoot on red-hot coals of
wood without burning the feet has to do with
A) low temperature of the coals.
B) mind over matter techniques.
C) low thermal conductivity of the coals.
16.17
13) A water-filled paper cup held in a flame will not catch fire. This is
because
A) the inside of the paper is wet.
B) water is an excellent conductor of heat.
C) the paper cup cannot become appreciably hotter than the water it
contains.
D) paper is a poor conductor of heat.
14) Your feet feel warmer on a rug than on a tile floor because the rug
A) for the same mass has more internal energy than tile.
B) is usually warmer than tile.
C) is a better insulator than tile.
D) all of these.
E) none of these.
16.18
-- Answers -MULTIPLE CHOICE.
The one alternative that best
completes the statement or
answers the question.
16.19
Chapter 16
1) Answer: A
2) Answer: A
3) Answer: A
4) Answer: A
5) Answer: C
6) Answer: A
7) Answer: A
8) Answer: B
9) Answer: D
10) Answer: C
11) Answer: B
12) Answer: C
13) Answer: C
14) Answer: C
16.20