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19 April, 20:50

If a wood is drowned in water up to 2/3 of its volume and the same wood is dipped in a oil upto 9/10 of its volume. What's the density of wood and the relative oil?

Density of water - 1000kgm-3

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  1. 19 April, 21:14
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    S. G. or specific gravity is the ratio of the density of an object to a fluid. It also is the fraction of the object's volume that would be submerged if the object were placed in the fluid. (note: if S. G.>1, the object will sink)

    S. G. = density (wood) / density (water)

    2/3 = density (wood) / 1000

    density (wood) = 2000/3 kg/m^3 = ~666.67 kg/m^3

    S. G. = density (wood) / density (oil)

    9/10 = 2000/3 / density (oil)

    density (oil) = 2000/3 / 9/10 = 20000/27 kg/m^3 = ~740.74 kg/m^3
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