Eight mercury drops, each of radius r, coalesce to form a bi... — JEE PYQs | Mockzy

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Eight mercury drops, each of radius r, coalesce to form a bigger drop. The surface energy released in this process is _____. (S is the surface tension of mercury).

8 π r^{2} S

16 π r^{2} S

64 π r^{2} S

4 π r^{2} S

A body of mass m is taken from the surface of earth to a height equal to twice t

An ideal gas at pressure P and temperature T is expand-ing such that = constant.

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