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Fluid-Mechanics
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Two soap bubbles with radii r1 and r2 (r1>r2) come in contact. Their common surface has a radius of curvature
The correct answer is:
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Two very wide parallel glass plates are held vertically at a small separation d and dipped in water. Some water climbs up in the gap between the plates. Let S be the surface tension of water, p0 = atmospheric pressure, p = pressure of water just below the water surface in the region between the plates. Then (assume hemispherical meniscus)
Two very wide parallel glass plates are held vertically at a small separation d and dipped in water. Some water climbs up in the gap between the plates. Let S be the surface tension of water, p0 = atmospheric pressure, p = pressure of water just below the water surface in the region between the plates. Then (assume hemispherical meniscus)
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A liquid drop at temperature T, isolated from its surroundings, breaks into several droplets. The temperature of the droplets will be
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Work done in splitting a drop of water of 1 mm radius into 64 droplets is (Surface tension of water is 
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Work done in splitting a drop of water of 1 mm radius into 64 droplets is (Surface tension of water is )
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There is an air bubble of radius R inside a drop of water of radius 3R. Find the ratio of gauge pressure at point B to that at point A.
There is an air bubble of radius R inside a drop of water of radius 3R. Find the ratio of gauge pressure at point B to that at point A.
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Iceberg floats in sea water with a part of it submerged. The percentage fraction of the ice berg submerged is (Density of ice 
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A body weights 150 kg in air, 120 g in water and 130 g in a liquid. The density of liquid in 
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A body weights 150 kg in air, 120 g in water and 130 g in a liquid. The density of liquid in is
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A steel block having an internal cavity weighs 234 g in air and 197 g in water. If the density of steel is 7 .8 g cm-3, then the volume of the cavity is
A steel block having an internal cavity weighs 234 g in air and 197 g in water. If the density of steel is 7 .8 g cm-3, then the volume of the cavity is
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A piece of brass (Cu and Zn) weighs 12.9 g in air. When completely immersed in water, it weighs 11.3g. Then relative densities of Cu and Zn are 8.9 and 7.1 respectively. The mass of copper in the alloy is
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A 0.5 kg block of brass (density; 
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The volume of the hollow portion of a sphere is 
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Two solid pieces, one of gold and the other of silver when immersed completely in water have equal weights. When weighted in air:
Two solid pieces, one of gold and the other of silver when immersed completely in water have equal weights. When weighted in air:
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A raft of wood (density 600 kg / m3) of mass 120 kg floats in water. How much weight can be put on the raft to make it just sink?
A raft of wood (density 600 kg / m3) of mass 120 kg floats in water. How much weight can be put on the raft to make it just sink?
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A body of density d and volume V floats with volume V1 of its total volume V immersed in a liquid of density d1 and the rest of the volume V2 immersed in another liquid of density 
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Two solids A and B float in water. It is observed that A floats with half of its volume immersed and B floats with 2/3 of its volume immersed. The ratio of densities of A and B is
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