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The heat (Q) supplied to a solid, which ...

The heat (Q) supplied to a solid, which is otherwise thermally isolated from it surrounding, is plotted as a function of its absolute temperature, `theta`. If is found that they are related by the equation`Q=a theta^(2)+btheta^(4)` ( a, b are constants). The heat capacity of the solid is,

A

`a(theta^(3))/3+b (theta^(5))/5`

B

`a theta+b theta^(3)`

C

`a (theta)/3+b (theta^(5))/5`

D

`2a theta + 4 b theta^(3)`

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