physics practice test 4
Substances absorb heat energy by the process of convection conduction radiation all of the above
all of the above
If you were caught in freezing weather with only a candle for heat, you would be warmer in an igloo a tent a car a wooden house
an igloo
if no molecular collisions occurred in a sample of gas, temperature of the gas would be unaffected increase decrease
be unaffected
a quantity of water has more entropy when it is boiling at room temperature frozen ice
boiling
the first law of thermodynamics is a restatement of the conservation of electric charge energy momentum all of the above none of the above
energy
Aluminum has a higher specific heat capacity than iron. This means that for equal masses of aluminum and iron, the metal that heats more quickly when the same amount of heat is applied is iron aluminum need more information
iron
which of the following normally warms up fastest when heat is applied? water wood iron glass all of the above
iron
a given amount of heat energy can be completely converted to mechanical energy in a steam engine a simple machine an atomic reactor all of the above none of the above
none of the above
In one word, how can water in the power plant of a nuclear submarine far exceed 100°C? conductivity evaporation vaporization condensation pressure
pressure
The planet Earth loses heat primarily by radiation convection conduction all of the above
radiation
If the specific heat capacity of water were lower than it is, a watermelon in a picnic cooler would cool in a
shorter time
earth's atmosphere gets most of its heat from the
sun
A body of water will be deeper when its temperature rises temperature drops neither of these
temperature rises
Stored potatoes, beets, and rutabagas freeze at temperatures below zero degrees Celsius (rather than at exactly zero) because A) they are good radiators of energy. B) they are relatively dense C) they are good absorbers of radiant energy D) the water in them contains dissolved salts and sugars E) all of the above
the water in them contains dissolved salts and sugars
to increase the temperature of 50 grams of water by 2 celsius degrees requires 0.04 calorie 25 calories 100 calories 2 calories 4.19 calories
100 calories
A boy scout will be burned more severely by 100 g of water at 100 C 100 g of steam at 100 C both about equally neither of these
100 g of steam at 100 C
the air pressure in a container of air at 27 C will double when heated to 327 degrees C 300 degrees C 54 degrees C 600 degrees C none of the above
327 degrees C
When 10 grams of hot water cool by 1°C, the amount of heat given off is 41.9 joules more than 41.9 joules 41.9 calories 41.9 Calories none of the above
41.9 joules
the molecules in a room-temperature glass of water jostle around at a very small range of speeds much the same rates of speed a great variety of speeds
a great variety of speeds
which of these is correct? a piece of solid iron floats in molten iron a piece of ice floats in water a piece of solid aluminum floats in molten aluminum all of the above
a piece of ice floats in water
Objects that radiate relatively well, A) Absorb radiation relatively well B) reflect radiation relatively well C) Both of these D) neither of these
absorb radiation relatively well
When a solid is changed to a liquid, the solid releases energy absorbs energy both of these neither of these
absorbs energy
the contained air in a closed, sealed can placed on a hot stove will undergo an increase in pressure temperature internal energy all of the above
all of the above
the quantity of heat that a substance can transfer relates to its specific heat capacity mass change in its temperature all of the above
all of the above
a heat engine would have 100% efficiency if its low-temperature reservoir were as hot as its reservoir at absolute zero either of these neither of these
at absolute zero
pour a liter of water at 40 C in to a liter of water at 20 C and the final temperature of the two becomes
at or about 30 C
solar power is used in many parts of the world for generating electricity heating water both of these neither of these
both of these
steam burns are more damaging than burns caused by boiling water because steam releases additional energy when it condenses has more energy per gram than boiling water both of these neither of these
both of these
translational motion is characterized by the motion used in measuring temperature motion that carries a molecule from one place to another both of these neither of these
both of these
which temperature scales have equal sized degrees? celsius and kelvin Fahrenheit and celsius Fahrenheit and kelvin none of the above
celsius and kelvin
Soaring birds and glider pilots can remain aloft for hours without expending power, due to convection conduction radiation all of the above
convection
melting snow tends to cool the surrounding air warm the surrounding air neither of these
cool the surrounding air
If you release a single molecule in an evacuated region it will initially move in any direction convect upward fall just as a baseball would be buoyed upward none of the above
fall just as a baseball would
The addition of salt to water affects its
freezing point
When you touch a cold piece of ice with your finger, energy flows
from your finger to the ice
The fact that gasoline overflows a full tank on a hot day is evidence that gasoline expands more with increasing temperature than its tank the tank contracts while gasoline expands with temperature both of these none of these
gasoline expands more with increasing temperature than its tank
which of the following expands more when the temperature is increased? Equal volumes of wood ice water iron helium all expand the same
helium
food in a pressure cooker is cooked faster due to higher temperature energy transfer in the water greater rate of bubble formation in the water all of the above
higher temperature
As a system becomes more disordered, entropy remains the same decreases increases
increases
If glass expanded more than mercury, then the column of mercury in a mercury thermometer would rise when the temperature decreases increases neither of these
increases
if a poor absorber of radiation were a good emitter, its temperature would be less than its surroundings the same as it's surroundings more than its surroundings
less than its surroundings
One of water's interesting thermal properties is that when heated it takes a relatively
long time in changing temperature
Metals are good conductors of heat and electricity due to relatively high densities of metals similar thermal and electrical conductive properties both transferring energy easily looseness of outer electrons in metal atoms
looseness of outer electrons in metal atoms
The reason you can walk barefoot on red-hot coals of wood without burning your feet mainly involves low temperature of the coals mind over matter techniques low conductivity of coals
low conductivity of the coals
a blueberry pie will be a net absorber of energy when its temperature is
lower than its surroundings
for increased atmospheric pressure, the boiling point of water remains at 100 degrees C rises goes down
rises
During snow fall, the surrounding air is cooled warmed both of these neither of these
warmed
which is the most abundant greenhouse gas in Earth's atmosphere? carbon dioxide nitrogen water vapor none of the above
water vapor
both black and white Road surfaces radiate energy. at midnight on a starry night the warmer road surface is the black surface white surface neither, as no noticeable differnece
white surface
when you touch a nail stuck in ice, energy flows from your hand to the ice the ice to your hand both of these neither of these
your hand to the ice