MHT CET 2026 Physics question
Under isothermal condition, two soap bubbles of radii and combine to form a single soap bubble of radius R. The surface tension of the soap solution is (P= outside pressure)
Answer: (A)
Solution
A soap bubble has two surfaces, so the excess pressure is and the internal pressure is . Isothermal combination: summed is conserved, so \dfrac{4T}{r_1}\tfracr_1^3\dfrac{4T}{r_2}\tfracr_2^3$ = (P +
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