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प्रश्न
How is the frequency of a stretched string related to its length?
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उत्तर
The frequency of a stretched string is inversely proportional to its length.
`f prop 1/l`
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संबंधित प्रश्न
State the use of echo by a bat, dolphin and fisherman.
Draw a labelled diagram to show the multiple reflections of sound in a part of the stethoscope tube.
Explain how is the principle of echo used by
(a) The bat during its flight at night,
(b) The dolphin to locate small fish as its prey.
What do you mean by reflection of sound? State one condition for the reflection of a sound wave. Name a device in which reflection of sound wave is used.
Mention two properties of a wave, one property which varies and the other which remains constant when the wave passes from one medium to another.
Why will an echo not be heard when the distance between the source of the sound and the reflecting surface is 10 m?
How are bats able to fly in the dark?
A sound wave whose frequency is 5000 Hz travels in air and then hits the water surface. The ratio of its wavelengths in water and air is ______.
