1.

A piece of lead falls from a height of 100m on a fixed non-conducting slab which brings it to rest. If the specific heat of lead is 30.6 cal/kg `.^(@)C`, the increase in temperature of the slab immediately after collision isA. `6.72^(@)C`B. `7.62^(@)C`C. `5.62^(@)C`D. `8.72^(@)C`

Answer» Correct Answer - B
`mgh=JmSDeltathetarArrDeltatheta=(gh)/(JS)`


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