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If a lead bullet be suddenly stopoed and...

If a lead bullet be suddenly stopoed and all its energy be used to heat it, with what velocity must the bullet be fired to raise the temperature through `100^(@)C`? (Specific heat capacity of leat `=31.4` calories per kg per kelvin and `J=4.2` joules per calorie.)

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The correct Answer is:
`162.4ms^(-1)`
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