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The specific heat c of a solid at low te...

The specific heat c of a solid at low temperature shows temperature dependence according to the relation `c= DT^(3)` where D is a constant and T is the temperature in kelvin. A piece of this solid of mass m kg is taken and its temperature is raised from 20K to 30K. The amount of heat required in the process in energy units is

A

`5 xx 10^(4)Dm`

B

`(33//4) xx 10^(4)Dm`

C

`(65//4)xx 10^(4)Dm`

D

`(5//4)xx 10^(4)Dm`

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