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प्रश्न
How do the following factor affect the speed of sound in air?
Moisture in air.
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उत्तर
The speed of sound increase with an increase in humidity because the moisture in air decrease the density of air and the speed of air is inversely proportional to the density of air. Hence, the sound travels faster in moist air.
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संबंधित प्रश्न
Select the correct alternative :
We can distinguish a shrill sound from a flat sound by its
In fig. shows a snap shot of a wave from of frequency 50 Hz in a string. The numbers in the diagram represents distance in centimeters. Fpr the wave motion, find
(a) Wavelength,
(b) Amplitude,
(c) Velocity.
The separation between two consecutive crests in a transverse wave is 100 m. If wave velocity is 20 m s-1, find the frequency of wave.
Match the pairs.
| Group ‘A’ | Group ‘B’ |
| (a) Flute | (1) Frequency less than 20 Hz |
| (b) Frequency | (2) Frequency more than 20000 Hz |
| (c) Sound level | (3) Vibrations in the air |
| (d) Ultrasonic sound | (4) Measured in Hz |
| (e) Infrasonic sound | (5) Decibel |
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Number of vibrations produced in one second is ______.
Through which medium sound travels faster, iron or water? Give reason.
Describe with diagram, how compressions and rarefactions are produced.
