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In concave(concavity) side the pressure is high. How? Consider a straight log of wood. Try to bend it into a bow(Dhanus). If you do it, a concave log of wood is formed. What must you do to make such bow? You must apply force towards the centre from two ends of the log of wood. In this similar analogy, this force tries to squeeze the film and pressure inside increases. So pressure is greater on concave side. Brush your knowledge, In star nuclear fusion occours when gravity tries to squeeze it's core and pressure is increased which maintains hydrostatic equilibrium increasing temperature of star resulting into fusion. So stars are circle ie. they have more pressure in concave side when T.S. is cut of part of it. Sun is also a star.
6 years ago
by
Rupesh Koirala