NDA 2026 Physics question
Consider the following statements in respect of sound waves : I. The speed of sound waves decreases with an increase in temperature if the atmospheric pressure remains the same. II. The speed of sound waves increases with increasing humidity if the atmospheric pressure remains the same. III. The speed of sound waves is not affected by a change in atmospheric pressure, provided the temperature is kept constant. Which of the statements given above are correct ?
Answer: (B)
Solution
. The speed of sound increases with temperature, so statement I is wrong. Moist air is less dense than dry air, so the speed
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