Physics

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A 1.6-m-long string fixed at both ends vibrates at resonant frequencies of 792 Hz and 990 Hz, with no other resonant frequency between these values.

(a) What is the fundamental frequency of this string?

(b) When the tension in the string is 1165 N, what is the total mass of the string?

Honestly, I am confused about this. COuld someone explain it to me. Thank you.

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