MHT CET 2025 Physics question
The temperature of an air bubble while rising from bottom to surface of a lake remains constant but diameter is doubled. If pressure on the surface is h meter of mercury column and relative density of mercury is '' then the depth of the lake is
Answer: (B)
Solution
Let be the pressure at the surface; m of mercury m of water (mercury is times denser than water). The temperature is constant, so Boyle's law holds: . Doubling the diameter multiplies the volume by , so . Also
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