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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 surrounding? Specific heat of aluminium `= 0.91 J//g^(@)C`.

A

`100^@C`

B

`103^@K`

C

`103^@C`

D

`50^@C`

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A 10 kW drilling machine is used to drill a bore in a small aluminium block of mass 8 kg. Find the rise in temperature of the block in 2.5 minutes, assuming 50% power is used up in heating the machine itself or lost to the surropundings. (Specific heat of aluminium = 0.91 J g^(-1).^(@)C^(-1) )

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