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Physics 7 Online
OpenStudy (anonymous):

a violin string vibrates at 196 Hz. what frequency will it vibrate with if it is fingered at one quarter of its length.

OpenStudy (jamesj):

if the wavelength of the string unfingered is λ, what will it be in the scenario you describe? Use the answer to that question together with the fact that (wavelength) x (frequency) = speed, which is a constant λf=v

OpenStudy (anonymous):

theres only 1 number given to us in this question, how do you find speed when all we have is frequency ?

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