SELECT * FROM question_mgmt as q WHERE id=4252 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=8 AND subId=16 AND chapterId=192 and ex_no='11' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 9th science Sound a sound wave travels at a speed of 339 m s 1 if i

Question:

A sound wave travels at a speed of 339 m s-1. If its wavelength is 1.5 cm, what is the frequency of the wave? Will it be audible?

Answer:

Speed of sound, = 339 m/s

Wavelength of sound, = 1.5 cm = 1.5 / 100 = 0.015 m

Speed of sound = Wavelength × Frequency

Frequency of of sound is 22600 Hz.

The audible range of the human ear is 20 Hz to 20000 Hz. It would not be audible.


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