Homework Statement
phi(x,y,z,t)= cos(wt- the dot product of K and x)
k= kx i hat + ky j hat + kz k hat units are m^-1
x= x i hat + y j hat + z k hat units are m
t is time and w is the angular velocity w/ units of sec^-1
show that abs. value of k = w/alpha by plugging the...