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Chapter 14: Q5Q (page 390)
The specific heat of water is quite large. Explain why this fact makes water particularly good for heating systems (that is, hot-water radiators).
Since water has a high specific heat, it contains a huge amount of thermal energy per unit mass with a relatively small rise in temperature.
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Does an ordinary electric fan cool the air? Why or why not? If not, why use it?
Which of the following happens when a material undergoes a phase change?
(a) The temperature changes.
(b) The chemical composition changes.
(c) Heat flows into or out of the material.
(d) The molecules break apart into atoms.
When hot-air furnaces are used to heat a house, why is it important that there be a vent for air to return to the furnace? What happens if this vent is blocked by a bookcase?
When a hot object warms a cooler object, does temperature flow between them? Are the temperature changes of the two objects equal? Explain.
If you hear that an object has 鈥渉igh heat content,鈥� does that mean that its temperature is high? Explain.
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