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Flame SCF 18 Near Chawla Lights Ph-7 Mohali 9888949978

9. If T is the surface tension of soap solution, the amount of work done in blowing a soap bubble from a diameter D to 2D is

(a) 2 πD²T

(b) 4 πD²T

(c) 6 πD²T

(d) 8 πD²T

Ans. c

5/5 - (1 vote)

PrevPrevious8. 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)

Next11. The surface tension of a liquid is 5 N/m. If a thin film of the area 0.02 m2 is formed on a loop, then its surface energy will beNext

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