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Two lead spheres of masses 10kg and 30k ...

Two lead spheres of masses `10kg` and `30k` approach each other with speeds `10ms^(-1)` and `20ms^(-1)` and collide completely inelastically. What is the heat produced by the collision? What is the rise in temperature if all the heat produced is ratained by the spheres? (Specific heat capacity of lead `=31 cal kg^(-1)K^(-1)` and `J=4.2` joules `cal^(-1)`)

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The correct Answer is:
`3375J,0.65^(@)C`
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