A Tuning Fork Is Sounded Above an Adjustable Length Resonating

question 27

Multiple Choice

A tuning fork is sounded above an adjustable length resonating tube (one end closed) ,which resonates at a length of 0.250 m and again at 0.750 m.What is the frequency of the fork when the speed of sound is taken to be 340 m/s?

• A) 340 Hz
• B) 680 Hz
• C) 1020 Hz
• D) 170 Hz

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