- #1

Fusilli_Jerry89

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## Homework Statement

A 7 metre long string is stretched between 2 walls so that its ends are fixed. It is made to vibrate and it is found that the displacement, y is given by: y = 0.023sin(xpi)cos(0.714 pi t) where x and y are in metres and t is in milliseconds.

a) to which harmonic, N, does the vibrtion correspond?

b) What is the frequency of the sound emitted by the string?

c) What is the speed of waves in the string?

## Homework Equations

y(N) = 2y sin((Npix)/L)cos((vNtpi)/L)

## The Attempt at a Solution

To get part a, can u use the formula and see that L must equal N in order to get the equation in the question, or no? I'm lost.