Question

    Two spherical soap bubbles of radii r1 and r2 coalesce to form a bubble of radius R. If surface tension of soap solution is T, atmospheric pressure is P. change in volume of the air enclosed is V and the change in surface area is A'.

    Complete the expression using above statement, 3PV + _____ = 0

    A 8TP Correct Answer Incorrect Answer
    B 4TP Correct Answer Incorrect Answer
    C 2TA Correct Answer Incorrect Answer
    D 4TA Correct Answer Incorrect Answer

    Solution

    The correct answer is D

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