Consider a traveling wave described by the formula
y1(x, t) = a sin(k x - wt).
this function might represent the lateral displacement of a string, a local electric field, the position of the surface of a body of water, or any of a number of other physical manifestations of waves.
part a
which one of the following statements about the wave described in the problem introduction is correct?
(a) the wave is traveling in the +x direction.
(b) the wave is traveling in the -x direction.
(c) the wave is oscillating but not traveling.
(d)the wave is traveling but not