MHT CET 2026 Physics question
The enclosed air inside a closed box of rigid walls has pressure . The density of air inside this box is constant. On heating the gas, the pressure of the enclosed air is increased from to . Now it is observed that the sound travels 1.4 times faster than at pressure . The ratio by is
Answer: (B)
Solution
The speed of sound in a gas is . The box is rigid, so the density is constant (and stays the same), hence .
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