A 10 kW drilling machine is used to dril...

A 10 kW drilling machine is used to drill a bore in a small aluminium block of mass `8.0 `kg. How much is the rise in temperature of the block in `2.5` minutes, assuming `50% `of power is used up in heating the machine itself or lost to the Surroundings. Specific heat of aluminium ` = 0.91 J g^(-1) K^(-1)`.

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`103 ^(@) C`

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