報紙明明係poor conductor of heat黎架喎
但係點解用報紙蓋住成個人唔可以保暖?
F.3 PHY heat transfer
2011-06-05 12:56 am
回答 (1)
2011-06-05 1:10 am
✔ 最佳答案
A sheet of newspaper is too thin to prevent conduction of heat, eventhough it is not a good thermal conductor.Second, to cover a human body with newpaper, you need to use many sheets. There are gaps in between each newspaper sheet that allows air flow and hence heat can be lost by convection.
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