Physics Problem- Waves?

Posted on 2017-06-08 18:40:00 in Physics by TATIANA

A sinusoidal wave is traveling on a string with speed 72.6 cm/s. The displacement of the particles of the string at x = 7.7 cm is found to vary with time according to the equation 
y = (4.7 cm) sin[0.70 - (6.6 s-1)t]. 
The linear density of the string is 5.2 g/cm. What are 
(a) the frequency and 
(b) the wavelength of the wave? If the wave equation is of the form 
y(x,t) = ym sin(kx - ωt), 
what are 
(c) ym, 
(d) k, and 
(e) ω, and 
(f) the correct choice of sign in front of ω? 
(g) What is the tension in the string?

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