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Exam 8: Temperature, Heat, and Thermodynamics

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Question 21

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When a bimetallic bar made of copper and iron strips is heated, the bar bends toward the iron strip. The reason for this is

A) copper expands more than iron.
B) copper gets hotter before iron.
C) iron expands more than copper.
D) iron gets hotter before copper.
E) none of these

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Question 22

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Heat energy travels from an object with a high

A) internal energy to an object with a lower internal energy.
B) temperature to an object with a lower temperature.
C) Both of these, for they say essentially say the same thing.
D) None of the above choices are true.

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Question 23

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The fact that a thermometer "takes its own temperature" illustrates

Consider a sample of water at 0 degrees C. If the temperature is slightly increased, the volume of the water

When mechanical work is done on a system, there can be an increase in

A temperature difference of 10 degrees Celsius is also equal to a temperature difference of 10 on the

Place a kilogram block of iron at 40 degrees C into a kilogram of water at 20 degrees C and the final temperature of the two becomes

Suppose you rapidly stir some raw eggs with an eggbeater. The temperature of the eggs will

Consider a closed, sealed can of air placed on a hot stove. The contained air undergoes an increase in

Before ice can form on a lake, all the water in the lake must be cooled to

During a very cold winter, water pipes sometimes burst. The reason for this is

Entropy measures

Consider a sample of ice at 0 degrees C. If the temperature is decreased, the volume of the ice

Which of the following contracts most when the temperature is decreased? Equal volumes of

The fact that desert sand is very hot in the day and very cold at night is evidence that sand has

To wholly convert a given amount of heat energy into mechanical energy is

Consider a steaming aluminum soda-pop can that contains a small amount of boiling water. When it is quickly inverted into a bath of cooler water the can is dramatically crushed by atmospheric pressure. This occurs because the pressure inside the can is rapidly reduced by

When water at 4 degrees C is heated it expands. When water at 4 degrees C is cooled, it

Suppose the temperature of the input reservoir in a heat engine doesn't change. As the sink temperature is lowered, the efficiency of the engine

When ice floats in water, a small part of it extends above the surface. Interestingly enough, the volume of ice that extends above the surface is equal to the volume of the