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Let A be the last digit and let B be the sum of the last three...

Let A be the last digit and let B be the sum of the last three digits of your 8-digit student ID. Example: for 20245347, A = 7 and B =14.
Consider a string with a length of (47.5 +A) cm tied at both end (like on a stringed instrument). If the frequency of the first harmonic on the string is (245+B) Hz, determine the speed of the wave in the string. Post your answer in m/s and with 3 significant figures.

A=4 B=4
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Answer #1

Length of string, L=47.5+A= 47.5+4=51.5cm=0.515 m

Frequency of first harmonic, f=245+B=245+4=249Hz

Let be the wavelength corresponding to the first harmonics then-

(only one loop formed for Ist harminic)

----------(1)

We know that-

(upto 3 significant figure)

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