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A block of ice is dropped into a well o...

A block of ice is dropped into a well of water, both ice and water being at `0^(@)C`. From what height must the ice fall in order that `1//100` of it may melt?
(`L` of ice `=80xx10^(3) calkg^(-1), J=4.2` joules `cal^(-1)` and `g=9.8ms^(-2)`)

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The correct Answer is:
`343m`
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