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संबंधित प्रश्न
How does a bat make use of ultrasonics waves to find its way?
What is the difference between a compression and a rarefaction in a sound wave? Illustrate your answer with a sketch.
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.
A thin metal plate is placed against the teeth of cog wheel. Cog wheel is rotated at a speed of 120 rotations per minute and has 160 teeth. Calculate:
- frequency of node produced.
- speed of sound, if wavelength is 1.05 m.
- what will be the effect when the speed of cog wheel is doubled?
Number of vibrations produced in one second is ______.
An earthquake produces which kind of sound before the mainshock wave begins
Give scientific reasons.
In earlier times, people used to listen for the arrival of a distant train by putting their ear to the rail.
