- #1
DGalt
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Homework Statement
A piano wire with mass 3.25 g and length 84.0 cm is stretched with a tension of 27.0 N. A wave with frequency 100 Hz and amplitude 1.30 mm travels along the wire.
Homework Equations
The only equation that I think applies to this one is P = .5*Sqrt(μ*F)*(omega^2)*A^2
The Attempt at a Solution
I've tried this freaking problem five times now, and I'm down to my last try on Mastering Physics (online homework program).
I thought this was a pretty straightforward problem. I started out solving for μ by basically converting the mass (3.25g) to kg and the length (84cm) to m and then dividing the mass by the length. I solved for omega with the equation omega = frequency * 2PI. F I'm assuming is the tension.
Then I thought it was simply a plug-in problem, but I can't seem to get it right. I had to do five different trials because at first I solved for μ wrong and then I wasn't sure what units the program wanted it in (just had Watts next to the solution, so I just assumed i needed to put everything into kg and m and all that stuff). But yea, I don't know what I'm doing wrong.
If anyone can help me out on this one I'd appreciate it, just can't seem to figure out what went wrong
thanks in advance