Question

One of the harmonic frequencies of tube A withtwo openends is 845 Hz. The next-highest harmonic frequency is 910Hz.(a) What harmonic frequency is nexthighest afterthe harmonic frequency 975Hz? (b) What is thenumber of thisnext-highest harmonic?
One of the harmonic frequencies of tube B withonly oneopen end is 1507 Hz. The next-highest harmonic frequencyis 1781 Hz.(c) What harmonic frequencyis next highest afterthe harmonic frequency 685Hz? (d) What is thenumber of thisnext-highest harmonic?