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A 20gm bullet whose specific heat is 500...

A 20gm bullet whose specific heat is 5000 J / (`kg-.^(@)C`) and moving at 2000 m/s plunges into a `1.0` kg block of wax whose specific heat is 3000 J /(`kg-.^(@)C`). Both bullet and wax are at `25^(@)C` and assume that (i) the bullet comes to rest in the wax and (ii) all its kinetic energy goes into heating the wax. Thermal temperature of the wax in `.^(@)C` is close to

A

`28.1`

B

`31.5`

C

`37.9`

D

`42.1`

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The correct Answer is:
C
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