Waves and energy travels in oposite direction?

A wave is transporting energy from left to right. The particles of the medium are moving back and forth in a leftward and rightward direction.

Explanation:

No, that's silly.

Waves carry energy. So they travel in the same direction, and wherever the wave goes, the energy goes.

answer; ///i do believe that the correct answer is ; ///(physical change);

i think it because equal matrices have equal dimensions, only square matrices can be symmetric. for all indices and . every square diagonal matrix is symmetric, since all off-diagonal elements are zero. in linear algebra, a real symmetric matrix represents a self-adjoint operator over a real inner product space.