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HomePhysics21. A spherical drop of water has radius 1 mm If surface tension of

21. A spherical drop of water has radius 1 mm If surface tension of

water is 70 x 10-3 N/m difference of pressures between inside and out side of the spherical drop is

(a)   35   N/m2

(b)    70 N/m2

(c)    140  N/m2

(d)  Zero

Ans. c

(22)

5/5 - (3 votes)

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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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