Increase in velocity of sound in the air for 1°C rise in temperature is_________________?
Correct answer: C. 0.61 ms-1
- A. 1.61 ms-1
- B. 61.0 ms-1
- C. 0.61 ms-1
- D. 2.00 ms-1
Explanation
Near ordinary temperatures, the speed of sound in air increases by approximately 0.61 m s^-1 for every 1 °C rise in temperature. This follows from the temperature dependence v approximately equals 331 m s^-1 + 0.61T, with T measured in °C near 0 °C. The value 1.61 m s^-1 is a likely arithmetic or constant-reading error, while 61.0 m s^-1 is too large by a factor of 100.
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About Speed of Sound
The speed of sound depends on the properties of the medium, including its elasticity and density, and in gases it varies mainly with temperature. Questions connect speed with frequency and wavelength, compare sound in solids, liquids and gases, and distinguish the speed of propagation from the oscillating particles' motion.
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