See attachment for full details
9) Suppose the fabled Loch-Ness Monster happened to swim by, grab the center of the bridge where we were standing, and shake it up and down at twice the frequency that you calculated in question 4.
That’s the frequency of the second harmonic. Why would a standing wave not form on the bridge in that case?

Question

See attachment for full details
9) Suppose the fabled Loch-Ness Monster happened to swim by, grab the center of the bridge where we were standing, and shake it up and down at twice the frequency that you calculated in question 4.
That’s the frequency of the second harmonic. Why would a standing wave not  form on the bridge in that case?

anonymous · Answer

numbers 4, 9 and 10 of the document I've attached is what is really got me boggled