Physics

Write the expression for y as a function of x and t in SI units for a sinusoidal wave traveling along a rope in the negative x direction with the following characteristics : A = 8 cm, wavelength = 80cm, f =3hz and y(0,t) = 0 at t = 0.
b) what if? Write an expression for y as a function of x and t for the wave in part (a) assuming y(x,0) =0 at the point x = 10cm

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