The momentum of a 75g bullet is 9 kg. ms per second towards a target. what is the bullet's velocity​

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.

3. dark matter

empty space could also be a simple vacuum