Sinusoidal waves travel on four different strings,
all with the same tension. Three of the strings
have the same linear mass density, but the fourth
has a different linear mass density. Use the
mathematical forms of the waves, given below,
to identify the string with the different linear
mass density. In the expressions x and y are in
centimeters and t is in seconds -
(A) y(x, t) = (2 cm) sin(2x − 4t)
(B) y(x, t) = (2 cm) sin(4x − 10t)
(C) y(x, t) = (2 cm) sin(6x − 12t)
(D) y(x, t) = (2 cm) sin(8x − 16t)