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7. A spherical liquid drop of radius R is divided into eight equal droplets. If surface tension is T, then the work done in this process will be

(a) 2 πR²T

(b) 3 πR²T

(c) 4 πR²T

(d) 2 πR²T

Ans. c

PrevPrevious7. In the following fig. is shown the flow of liquid through a horizontal pipe. Three tubes A, B and C are connected to the pipe. The radii of the tubes A, B and C at the junction are respectively 2 cm, 1 cm and 2 cm. It can be said that the

Next8. The amount of work done in blowing a soap bubble such that its diameter increases from d to D is (T= surface tension of the solution)Next

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