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A tuning fork of unknown frequency is sounded with a 512Hz tuning fork. You hear 20...

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supersmartpants | Salutatorian

Posted May 26, 2013 at 5:30 AM via web

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A tuning fork of unknown frequency is sounded with a 512Hz tuning fork. You hear 20 beats in 4.0s

a) What are the possible frequencies of the tuning fork?

b) A small elastic is placed on the tines of 512Hz tuning fork changing the frequency slightly. Now 16 beats are detected in 4.0s. What is the frequency of the unknown tuning fork and the new frequency of the weighted 512Hz tuning fork? Explain the reasoning.

Tagged with physics, science, sound

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ishpiro | Teacher | (Level 1) Associate Educator

Posted May 26, 2013 at 4:51 PM (Answer #2)

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I believe this was meant to be

x+ 4 = 507

x = 507 - 4 = 503

The possible new frequencies of the tuning fork with elastic are 503 Hz  and 511 Hz.

 

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supersmartpants | Salutatorian

Posted May 26, 2013 at 3:09 PM (Reply #1)

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"

or

x+4= 517

x=517-4=513 Hz

This is not possible.

So new frequency of  weighted tuning fork= 511 Hz.

"

Why is it not possible? Can you please explain?

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