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Physics Chapter 21

Temperature, Heat and Expansion

QuestionAnswer
Which temperature scale labels the freezing point of water at 0 degrees? Celsius
Internal energy is the _____. total amount of energy contained in an object
The energy content of a piece of food is normally determined by _____. burning the food
Specific heat capacity is related to the amount of internal energy _____. needed to change the temperature of one gram of a substance one degree
The largest extremes in temperature are usually experienced _____. in the middle of a continent
If the specific heat capacity of water were higher than it is, lakes would be _____. less likely to freeze
During a very cold winter, water pipes sometimes burst. The reason for this is _____. water expands when freezing
A bimetallic strip will bend when heated because _____. each metal expands at different rates
A piece of iron (specific heat = 0.12 cal/g°C) and a cup of water both have the same temperature. If they are heated so the internal energy of each doubles _____. the iron will have the higher temperature
A change in temperature of 10°C is equal to a change of 10°K
Consider a gap cut into a metal ring. If the ring is heated, the gap becomes _____. wider
Which releases the most energy, 100 grams of 100°C water cooling to 50°C, or 100 grams of iron at 100°C cooling to 50°C? (The specific heat of iron is 0.12 cal/g°C.) Water
Mix some 70°C water with some 40°C water and you'll get water at _____. a temperature depending on the masses (or volumes) of water
Heat is the _____. energy transferred between objects because of a temperature difference
When water at 4 degrees C is heated, it expands. When water at 4 degrees C is cooled, it _____. expands
Created by: Cinda
 

 



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