Recent content by kell

Yup, you're all clearly correct. Thanks so much for pointing it out. I really don't know why I was trying to divide by the L. I had established it way early on in my workings and didn't think to question it later. Losing the forest for the trees! Cheers everyone :)

Hi all, this is a problem with which I led myself in circles with for hours, because I kept forgetting to factor in a different thing each time. Long story short, I thought I'd cracked it, but my answer and the given answer are out by a square. Please see my efforts below! Homework Statement...

So, if the closed end is at the observer's ear, and the open end is at the vibrating string, and we use (n+2) where I used (n+1) in my original attempts, then v=665 m/s, which is still double.

That ambiguity is my fault: The original wording said "...a cardboard tube of length 1.4m placed close to his ear (the tube hence behaves as open at one end and closed at the other)." You're right, there'd be a node at the ear end.

I think I can. I'll have to come back to it in a couple of hours- revision process moving ever onwards- but I'll update once I've figured it out.

Homework Statement An observer listens to a vibrating string using a cardboard tube of length 1.4m placed close to his ear (one end closed). The string is excited so as to vibrate at its fundamental frequency, and the tension is increased slowly. The intensity of the sound heard by the...