Posted by Kyle on Saturday, December 3, 2011 at 8:23pm.
Unless you have a typo, sin[1.5 - (3.0 s-1)t] is really sin[1.5 - 2t]
when is 2 t equal to 2 pi ?? (that is when the argument of the sin function changes by 2 pi, a period)
That is when t increases by pi
so the period, T is pi
the frequency = 1/pi
wavelength is how far it goes in pi seconds
That is 30 * pi
y = (5.0 cm) sin[1.5 - 2t] sin (2 pi x/L - phi)
where L is that wavelength
get the phase angle phi from the value of y when x = 15 and t = 0
you have the speed of the wave c = L/T
You know the equation for speed of the wave versus tension and density, so calculate the tension.
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