PHY1025 exam 4 review
d
Substances absorb heat energy by the process of: A. conduction B. convection C. radiation D. all of these
b
A substance that heats up relatively quickly has a A. high specific heat B. low specific heat C. high conductivity D low conductivity
b
Consider a closed, sealed can of air placed on a hot stove. Then contained air undergoes an increase in: A. mass B. pressure C. volume D. all of these
b
Consider a sample of ice at 0 degrees C. If the temperature is increased, the volume of the ice: A. increases B. decreases C. stays the same D. increases then decreases
a
Energy transfer by conduction is primarily restricted to A. solids B. vacuum C. space D. fluids (liquids and gases)
b
For increased atmospheric pressure, the boiling temperature of a liquid: A. goes up B. goes down C. remains at 100 degrees C D. fluctuates
c
If a liter of water at 80 degrees C is mixed up with a liter of water at 60 degrees C, the final temperature of the two will be: A. 80 degrees C B. about 60 degrees C C. about 70 degrees C D. about 140 degrees C
a
If a poor absorber of radiation were a good emitter, its temperature would be: A. less than its surroundings B. more than its surroundings C. the same as its surroundings D. zero degrees celcius
c
If a solid object radiates more energy than it absorbs, it's: A. internal energy increases B. temperature decreases C. internal energy decreases D. internal energy remains the same
a
If air were a better conductor than it is, at night the Earth would be: A. considerably colder B. considerably warmer C. not different in temperature D. in a frozen state
b
If the specific heat of water were higher than it is, ponds in the cold of winter would be: A. more likely to freeze B. less likely to freeze C. neither more or less likely to freeze D. either more or less likely to freeze
c
If you want to cook eggs by boiling them while in the mountains, then compared to sea level cooking you should: A. use a hotter flame B. boil the eggs for a shorter time C. boil the eggs for a longer time D. none of the above
d
Morning dew on the grass is a result of: A. evaporation of water B. the open structured form of water crystals C. air pressure on water vapor D. slow moving water molecules sticking to one another
b
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. low thermal conductivity of the coals C. mind over matter techniques D. high thermal conductivity of the coals
a
The fact that desert sand is very hot in the day and very cold at night is evidence that sand has: A. a low specific heat B. a high specific heat C. no specific heat D. constant specific heat
a
The food in a refrigerator is cooled by: A. vaporization of refrigerating fluid B. condensation of the refrigerating fluid C. the ice in your nearby freezer D. its own cooling mechanism
c
The moderate temperature of islands throughout the world has much to do with water's: A. poor conductivity B. vast supply of internal energy C. high specific heat D. high evaporation rate E. absorption of solar energy
c
The planet Earth loses heat mainly by: A. conduction B. convection C.radiation D. all of these
d
To melt 50 grams of 0 degree Celsius ice requires: Use Q=ml A. 25 calories B. 50 calories C. 80 calories D. none of these
b
To turn 7 grams of ice to water requires: Use Q=ML A. 7 calories B. 560 calories C. 80 calories D. 3780 calories
a, e
When a block of ice at zero degrees Celsius melts, the ice: A. absorbs energy from its environment B. releases energy to its environment C.absorbs energy and gets warmer D. releases energy and gets warmer E. absorbs energy but does not change temperature
a
When a liquid, ( water) changes to gas, it: A. absorbs energy B. releases energy C. neither absorbs nor releases energy D. either absorbs or releases energy
c
When heat is added to boiling water, its temperature: A. increases B. decreases C. does not change D. increases first, then decreases
a
When you touch a cold piece of ice with your finger, energy flows: A. From your finger to the ice B. from the ice to your finger C. actually, both ways D. from ice to the surroundings
a
Which body glows with electromagnetic waves? A. Both the Sun and the Earth B. only the Sun C. only the Earth D. neither the Sun or the Earth
