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HomePhysics9. 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

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

(11)

5/5 - (1 vote)

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12. An ideal gas is taken through the cycle A→ B → C → A, as shown in the figure. If the net heat supplied to the gas in the cycle is 5 J, the work done by the gas in the process C → A is

(a)      – 5 J (b)  – 10 J (c)   – 15 J (d)  – 20 J Answer-a (126)

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