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Calculate the daily loss of energy by th...

Calculate the daily loss of energy by the earth, if the temperature gradient in the earth's crust is `32^(@)C` per km and mean conductivity of the rock is `0.008` of CGS unit. (Given radius of earth `=6400km`)

A

`10^30 ` cal

B

`10^40 ` cal

C

`10^20 ` cal

D

`10^18 ` cal

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The correct Answer is:
D
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