Gat one point in a pipeline, the water speed is 1.8 m/s, and the gauge pressure is 51500 pa. find the gauge pressure (in pa) at a second point in the line 11.5 m lower than the first if the pipe diameter at the second point is twice that at the first. use a density of water 1000 kg/m3.

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.