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Unit - 5.4 Transmission Of Heat — PHYSICS STD 7 — Question

ICSE BoardEnglish MediumSTD 7PHYSICSUnit - 5.4 Transmission Of Heat2 Marks
Question
Explain the following :Why does an ice box have double walls?
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Answer

The iceboxes are generally double-walled iron boxes. The space in between the wall is filled with glass wool, which is a bad conductor of heat. So, the heat from outside does not reach the ice and hence it does not melt.

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