(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Two sinusoidal waves in a string are defined by functions

y1= (2.00cm)sin(20x-32t)

y2=(2.00cm)sin(25x-40t)

where y and x are cm and t is sec

(a) What is the phase difference between these two waves at the point x = 5 cm and t = 2 s?

(b) What is the position x value closes to the orgin for which the two phases differ by +/- pi at t = 2 s? (This location is where the two waves add to zero)

2. Relevant equations

I use the equation given to me as y1 and y2

not sure if there is an equation for phase difference

3. The attempt at a solution

(a) I plugged in 5 cm and 2 s for y1 and y2

y1 = -1.9835 and y2 = 1.7018

but Im not sure what these answers mean and if they are relevant

b) (2sin(20x-32*2) + 2sin(25x-40*2) = 0 and solve for x? Is this correct?Do I do inverse sin and then move the (32*2 and 40*2) to the other side?

Thanks for any help!!!!

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# Homework Help: Phase difference

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