I have a thermal flask in which i have to fill the boiled
water.
I also have thermocol, saw dust and silver paper.
Now tell me how i have to arrange these material to attain
minimum
heat loss.

Answer Posted / abhay

for minimising heat losses we should always keep the material with least thermal conductivity ie. highest thermal reistance at the outer most layer and material with highest conductivity
at the imner side sothe correct order from inside is
0>thermal flask
1>silver plate
2>saw dust
3.thermocol

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