The specific heat of solids at low temperatures varies with absolute temperature `T` according to the relation `S=AT^(3)`, where `A` is a constant. The heat energy required to raise the temperature of a mass m of such a solid from `T=0` to `T=20K` is:A. `4xx10^(4)mA`B. `2 xx 10^(4)mA`C. `8xx10^(6)mA`D. `2xx10^(6)mA`.

The specific heat of solids at low temperatures varies with absolute t

1.	The specific heat of solids at low temperatures varies with absolute temperature `T` according to the relation `S=AT^(3)`, where `A` is a constant. The heat energy required to raise the temperature of a mass m of such a solid from `T=0` to `T=20K` is:A. `4xx10^(4)mA`B. `2 xx 10^(4)mA`C. `8xx10^(6)mA`D. `2xx10^(6)mA`.
Answer» Correct Answer - A `Q=int_(0)^(20)mS" "dT=int_(0)^(20)(AT^3)dT=4xx10^(4)mA`.

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