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If the terminal speed of a sphere of gold (density 19·5 kg/m^(3)) is 0.2 m/s in a viscous liquid (density 1.5 kg/m^(3)), find the terminal speed of sphere of silver (density 10.5 kg//m^(3)) of same size in same liquid. |
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Answer» 0·2 m/s `therefore(v_(2))/(v_(1))=((o_(2)-sigma)/(p_(1)-sigma))` as r and N are same`. `thereforev_(2)=((10.5-1.5)/(19.5-1.5))xx0.2=0.1ms^(-1)` THUS correct choice is ©. |
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