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Thermal Expansion of Solids

Ice packed in...

Question

Ice packed in sawdust does not melt

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Solution

Ice packed in saw dust dosent melt quickly because the saw dust acts as a cushioner. it does not allow the air to hit the ice and also doesn't let the warmth of the ice get out. Saw dust is a bad conductor of heat.

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Q. Deepak put twenty ice cubes of the same volume into four containers packed inside different materials. He recorded the time taken for the ice to melt in each case. The table shows his results. Which of the boxes should he choose to carry ice that he needs to take to a friend's house 120 km away?
Deepak's Observations

Packing Material	Melting
a. thermocol	3 h 10 min
b. paper	2 h 05 min
c. sand	30 min
d. sawdust	1 h 15 min

When Ice Cubes are kept inside a thermocol box

It does not melt fast. Why??

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