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Find the excess pressure inside (a) a dr...

Find the excess pressure inside (a) a drop of mercury of radius 2 mm (b) a soap bubble of radius 4 mm and (c) an air bubble of radius 4 mm formed inside a tank of water. Surface tension of mercury, soap solution and water are `0.465Nm^-1, 0.03Nm^-1 and 0.076Nm^-1` respectively.

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Find the excess pressure inside a drop of mercury of radius 2 mm , a soap bubble of radius 4 mm and an air bubble of radius 4 mm formed inside a tank of water. Surface tension mercury is 0.465 N//m and soap solution and water are, 0.03 N//m and 0.076 N//m repsectively.

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Find the pressure inside on air bubble of radius 0.1 mm just inside the surface of water. Surface tension of water = 72 dyn. cm^-1 .