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Work Done When Force Is Varying

Specific heat...

Question

Specific heat of aluminium is $0.25 c a l / g^{o} C$ . The water equivalent of an aluminium vessel of mass one kilogram is

40 g m

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250 g m

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25 g m

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2.5 g m

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Solution

The correct option is B $250 g m$
Heat capacity of 1kg of Aluminum $= 1000 \times 0.25 = 250 c a l /^{o} C$
Water equivalent of this heat capacity is
$m_{w} \times C_{w} = 250$
$m_{w} \times 1 = 250$
$m_{w} = 250 g$
i.e 250 gm of water.

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