本题目来源于试卷: gc textbook chater 14 heat，类别为 IB物理学
[问答题]
Why is the liner of a thermos bottle sil i8zirroeb7 ;01ud ex) rcms7 /th9 qun9.rwm*vered (Fig. 14–15), and why does it have a vacuum between its two walls?
9mt w.*cunqmh /9rrs7
参考答案:
Shiny surfaces absorb very little of the
radiation that is incident on them – they reflect it back towards the
source. Thus the liner is silvered to
reduce radiation energy transfer (both into and away from the substance in the
thermos). The (near) vacuum between its
two walls reduces the energy transfer by conduction. Vacuum is a very poor conductor of heat.
本题详细解析:
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