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संबंधित प्रश्न
Fill in the blank.
The number of times a body vibrates in one second is called its ______.
What type of wave is represented :
(a) by density-distance graph?
(b) by displacement-distance graph?
Which of the following frequency of sound can be generated by a vibrating simple pendulum as well as by the vibrating vocal cords of a rhinoceros ?
Complete the following sentences :
Wave velocity = ________________ × wavelength.
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 |
The distance between one crest and one trough of a sea wave is 4.5 m. If the waves are produced at the rate of 240/min, calculate the time period.
Explain how the principle of echo is used by
The dolphin to locate small fish as its prey.
Sound waves travel very fast in
The sound produced by a thunderstorm is heard 10 s after the lightning is seen. Calculate the approximate distance of the thunder cloud. (Given the speed of sound = 340 m s–1.)
