and breaks up into a million droplets, all of the same size. Find theA mercury drop of radius 0.5cm falls from a height on a glass plateheight from which the drop must have fallen. (Density ofAns: The diameter of theEXERCISE 77.1mercury=13600kg/m, surface tension of water-D0.465N/m).A capillary tube 2mm in diameter is immersed in a beaker of mercuThe mercury level inside the tube is found to be 0.5cm below the levelof the reservoir. Determine the contact angle between the mercuryand the glass. (T=0.4N/m, pm =Calculate the density of paraffin oil, if a glass capillary of diameter0.25mm dipped in paraffin oil of the surface tension 0.0245N/m risesto a height of 4cm. (Angle of contact of paraffin oil with glass is 28°and g-9.8m/m2).A raindrop of diameter 4mm is about to fall on the ground. Calculatethe pressure inside the raindrop. (Surface tension of waterT=0.072N/m, atmospheric pressure.The total energy of free surface of a liquid drop is 2n times the surfacetension of the liquid. What is the diameter of the drop?. (Assume all7.213.6 x 10 kg/m³).7.37.47.5terms in SI unit).114

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height from which the drop must have fallen. (Density of A mercury drop of radius 0.5cm falls from a height on a glass plate and breaks up into a million droplets, all of the same size. Find the 7.1 mercury=13600kg/m, surface tension of water%3D0.465N/m).