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Question

The rate of loss of heat through a glass window of area 1000 cm2 and thickness 0.4 cm when temperature inside is 37oC and outside is -5oC is

(Given, coefficient of thermal conductivity of glass is 2.2 x 10-3 cal s-1 cm k-1)


A

321 cal s-1

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B

300 cal s-1

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C

200 cal s-1

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D

231 cal s-1

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Solution

The correct option is D

231 cal s-1



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