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Assuming the density of air to be 1.295 kg m-3, find the fall in barometric height in mm of Hg at a height of 107 m above the sea level. Take density of mercury = 13.6 × 103 kg m-3.
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Explain the following :
Toy balloons filled with hydrogen rise to the ceiling, but if they are filled with carbon dioxide, then they sink to the floor.
Explain the following :
As a ship in harbour is being unloaded, it slowly rises higher in water.
A rubber ball floats on water with its 1/3rd volume outside water. What is the density of rubber?
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A hollow cylinder of copper of length 25 cm and area of cross-section 15 cm2, floats in water with 3/5 of its length inside water. Calculate:
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(2) wt. of cylinder.
(3) extra force required to completely submerge it in water.
Select the correct option:
The ratio between the mass of a substance and the mass of an equal volume of water at 4°C is called:
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