A string on a musical instrument is 1.20 m long and is tuned to that when unfing

Question

A string on a musical instrument is 1.20 m long and is tuned to that when unfingcrcd it produces F below middle C, 175 Hz. (A) 1 low far from the end of the string must the string be held down to produce the A below middle C, 220 Hz? (B) What is the wavelength on this string of this 220 Hz wave? (C) What arc the frequency and wavelength of the sound wave produced by this in air at 20 C? When standing at a certain distance from a jet on the ground on which all three engines arc running at equal power, the sound level is heard at the threshold of pain, 120 dB. (A) If the pilot shuts down two engines but leaves the third at the same power, what is the sound level that is heard? (B) When at a different distance, the same jet is initially heard at 95 dB. At that point after two engines are shut off, what sound level is heard?

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