NSO Science Olympiad Online Mock Test Class 9 Set E

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Question 1

Question

The frequency of a source is 20 kHz. The frequencies of the sound waves produced by it in water and air will

	Answer
	Depend upon the velocity of the waves in these media
	Depend upon the density of the media.
	Be the same as that of the source
	Depend upon the wavelength of the waves in these media