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संबंधित प्रश्न
How is the frequency of a stretched string related it’s tension?
Name the waves which are used in sonar to find the depth of a sea. Give one reason for their use.
What is a bulb horn ? Name the principle on which a bulb horn works.
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.
Why will an echo not be heard when the distance between the source of the sound and the reflecting surface is 10 m?
Draw a diagram representing a wave of amplitude 4 cm and wavelength 2 m. If the frequency of the wave is 150 Hz, calculate its velocity.
Explain why, the ceilings of concert halls are curved.
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 ______.
