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प्रश्न
What is sound ?
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उत्तर
Sound is a form of energy which produces the sensation of hearing.
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संबंधित प्रश्न
Write the audible range of frequency for the normal human ear.
Name the characteristic which differentiates two sounds of the same pitch and same loudness.
Define the term intensity of a sound wave. State the unit in which it is measured.
Which of the following can produce longitudinal waves as well as transverse waves under different conditions?
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.
State the speed of (i) light and (ii) sound in air?
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?
A sound wave of wavelength 1/3 m has a frequency 996 Hz. Keeping the medium same, if frequency changes to 1328 Hz. Calculate
- velcoity of sound
- new wavelength.
The sound waves travel faster ______.
Two observers are stationed in two boats 4.5 km apart. A sound signal sent by one, under water, reaches the other after 3 seconds. What is the speed of sound in the water?
