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You are tuning a guitar by comparing the sound of the string with that of a standard tuning fork. you notice a beat frequency of 5 hz when both sounds are present. youfrequencyof5hzwhenbothsoundsarepresent.youtighten the guitar string and the beat frequency rises steadily to 8 hz. to tune the string exactly to the tuning fork you shouldfork, youshould

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lilaipo
Because tightening the string increased the beat frequency from 5hz to 8hz, it means that it was already over the desired frequency. The best thing to do is to loosen the string until 0 beats are heard.
facundo3141592

Answer:

When you tighten the string, the tension of the string increases, and this causes that the string vibrates faster (this is way the frequency increases) now, the beat frequency (or difference in the frequencies) starts at 5hz, then when you tighten the string it increases to 8hz, then you need to untighten the string in order to reach a beat frequency near to zero.

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