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    What is the Time to Drain a Tank with a Small Hole at the Base?

    A large tank with Diameter D, open to the air , contains water upto heigh h . A small hole with diameter d( d<<D) is made at the base of the tank. Ignoring the effects of visocity , calculate the time it takes for the entire water to drain completely.
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    Calculate Percent Volume Submerged: Buoyancy Problem

    in this case i got the density of wood more than that of that oceon so i think it will sink!
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    Calculate Percent Volume Submerged: Buoyancy Problem

    is this right-?? Volume submerged = Density of wood / Density of oceon water?
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    Calculate Percent Volume Submerged: Buoyancy Problem

    the density is 1.428 X 10^-3 kg/m3 for the wood, so it will float right completely above the ocean surface?
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    Calculate Percent Volume Submerged: Buoyancy Problem

    A rectangular piece of wood ( 5.0 X 4.0 X 3.0 cm) and mass 42g is thrown into the oceon, how do i calculate the percentage of volume floating above the water?
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