derive an expression for excess pressure inside a spherical liquid drop of radius r and surface tension T. hence find the value of excess pressure inside a spherical soap bubble.
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It has no component perpendicular to the horizontal surface. As a result, there is no pressure difference between the liquid side and the vapour side. ... Thus, there is always an excess of pressure on the concave side of a curved liquid surface over the pressure on its convex side due to surface tension.
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