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A metal ball ofradius 10^(-4) m and dens...

A metal ball ofradius `10^(-4)` m and density `10^4 kg//m^3` falls freely under gravity through a distance 'h' and enters a tank of water. It is found that after entering the water, the velocity of ball does not change. What is the value of h?
`[eta "for water "10^(-5)" Pas ",g=10m//s^2" and "orh_("water")=10^3kg//m^3`]

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