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Category: Physics

Distinguish between loudness and intensity of sound.

Class 9 Physics Sound
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A person is listening to a tone of 500 Hz sitting at a distance of 450 m from the source of the sound. What is the time interval between successive compressions from the source?

Class 9 Physics Sound
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Calculate the wavelength of a sound wave whose frequency is 220 Hz and speed is 440 m/s in a given medium.

Class 9 Physics Sound
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How are the wavelength and frequency of a sound wave related to its speed?

Class 9 Physics Sound
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What are the wavelength, frequency, time period and amplitude of a sound wave?

Class 9 Physics
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Guess which sound has a higher pitch: guitar or car horn?

Sound Class 9 Physics
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Which does wave property determine (a) loudness, (b) pitch?

Class 9 Physics Sound
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Suppose you and your friend are on the moon. Will you be able to hear any sound produced by your friend?

Class 9 Physics
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Why are sound waves called mechanical waves?

Class 9 Physics Sound
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Explain how sound is produced by your school bell?

Sound Class 9 Physics
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How does the sound produce by a vibrating object in a medium reach your ear?

Class 9 Physics Sound
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A freely falling object eventually stops on reaching the ground. What happened to its kinetic energy?

Class 9 Physics Work and Energy
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