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A black body of mass 34.38 g and surface...

A black body of mass 34.38 g and surface area `19.2cm^(2)` is at an initial temperature of 400 K. It is allowed to cool inside an evacuated enclosure kept at constant temperature 300 K. The rate of cooling is `0.04^(@) "C s"^(-1)`. The specific heat of the body in `"J kg"^(-1)K^(-1)` is `("Stefan's constant "=sigma=5.73xx10^(-8)"W m"^(-2)K^(-4))`

A

2800

B

2100

C

1400

D

1200

Text Solution

Verified by Experts

The correct Answer is:
C
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