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Standard VIII

Physics

Buoyant Force

25, A ball of...

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25, A ball of density and radius r is dropped on thesurface of a liquid of density p from certain height, ifspeed of ball does not change even on entering inliquid and viscosity of liquid is η , then the heightfrom which ball dropped is2 ,29η 2(o-p)r(3)--9η (4) 2g9η

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