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