Q.

An ice cube containing a piece of lead floats in water. What would be the effect on the level of water if the ice cube melts?

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a

It would fall

b

it would rise

c

It would remain the same

d

It would rise very high.

answer is A.

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Detailed Solution

Let M and m represent the masses of ice and lead respectively.Now, (M+m)g = Vρwg∴  V = M+mρwAfter melting of ice, volume of water and lead,  V' = Mρw+mρ1Since ρ1 > ρw,   ∴  v'
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An ice cube containing a piece of lead floats in water. What would be the effect on the level of water if the ice cube melts?