Advertisements
Advertisements
प्रश्न
A person hearing at one end of a long metal bar hears two distinct sounds when the other end is struck with a stone. Explain, giving scientific reasons
Advertisements
उत्तर
A person hearing at one end of the long metal bar hears two distinct sounds when the other end is struck with a stone because the sound comes from the metal bar as well as from the air. The sound travels faster in solids than air. So, the first sound comes from metal bar hitting and then from the air.
APPEARS IN
संबंधित प्रश्न
Which one of the following does not consist of transverse waves?
In an experiment, Anhad studies sound waves. He sets up a loudspeaker to produce sound as shown below :
Anhad adjusts the signal to the loudspeaker to give a sound of frequency 200 Hz.
(a) What happens to the air in-between Anhad and the loudspeaker ?
(b) Explain how Anhad receives sound in both ears.
We can distinguish between the musical sounds produced by different singers on the basis of the characteristic of sound called :
Define the term amplitude of a wave. Write its S.I. unit.
Define the term wave velocity. Write its S.I. unit.
Describe a simple experiment to determine the speed of sound in air. What approximation is made in the method described by you?
Sound is generated by the rhythmic ______ of an object.
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?
The sound waves travel faster ______.
What are the uses of infrasonic sound?
