SELECT * FROM question_mgmt as q WHERE id=4245 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)
A person has a hearing range from 20 Hz to 20 kHz. What are the typical wavelengths of sound waves in air corresponding to these two frequencies? Take the speed of sound in air as 344 m s-1.
Hearing range for humans = 20 Hz to 20 kHz
Speed of sound = 344 m/s
For a sound wave,
Speed = Wavelength × Frequency
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