Two soap bubbles of radii a and b coalesce to form a single bubble of radius c. If the
Channel: Doubtnut
Date: 2020-08-02

Two soap bubbles of radii a and b coalesce to form a single bubble of radius c. If the external pressure is P, show that the surface tension T is given by `T = P(c^(3) - a^(3) - b^(3))/(4(a^(2) + b^(2) - c^(2))`