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| Q. |
The velocity of sound in air – |
| A. | decreases with increase of temperature |
| B. | increases with decrease of temperature |
| C. | does not depend on temperature |
| D. | decreases with decrease of temperature |
| Answer» D. decreases with decrease of temperature | |
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Explanation: Assuming air to be an ideal gas, the speed of sound c depends on temperature only, not on the pressure or density. As air temperature increases, so does the speed of sound and vice versa. This is due to the individual air particles having extra kinetic energy at higher temperatures and lesser at lower temperatures. |
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