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## Homework Statement

A transverse wave on a rope is given by the following equation.

y(x, t) = ( 0.710 cm ) cos pi [(0.400 cm^-1)x + (500 s^-1)t]

From this, find the amplitude, period, frequency, wavelength and the speed of propogation.

## Homework Equations

Well, I know that v=f*lambda. I also know the general equation for sinusodal models in the -x direction:

y(x,t)= A*cos2pi[(x/lamda)+(t/period)]

(I choose to use this particular equation because it ties in with the one given to me)

## The Attempt at a Solution

This problem is driving me nuts. I should be able to just take out the units that it aligns with and get that for the answer, right? I took out the 0.71, so I found the amplitude. I found the frequency by dividing 500 by 2. I found the period by dividing 1/250. But I can't for the life of me find the wavelength or the speed of propogation, can anyone please help? Thanks very much!

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