本题目来源于试卷: gc textbook chater 14 heat，类别为 IB物理学
[问答题]
In warm regions wherem:t n,a3ie1ado bg-vp79s idu c,-e6 y tropical plants grow but the te2lc9q a2r-qf bmperature may drop below freezing a few times in the winter, the destruction of sensitive plants due to freezing can be reduced by watering them a2-f 2 rb9qqlcin the evening. Explain.
参考答案:
The water will coat the plants, and so the
water, not the plant, is in contact with the cold air. Thus as the air cools, the water cools before
the plant does – the water insulates the plant.
As the water cools, it releases energy, and raises the temperature of
its surroundings, which includes the plant.
Particularly if the water freezes, relatively large amounts of heat are
released due to the relatively large heat of fusion for water.
本题详细解析:
暂无
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