Agas flows along the x axis with a speed of v = 5x m/s and a pressure of p = 10x2 n/m2 , where x is in meters.
(a) determine the time rate of change of pressure at the fixed location x = 1 (i. e., for the particle currently at x=1).
(b) determine the time rate of change of pressure for a fluid particle flowing past x = 1. (you are fixed at x=1)
(c) explain without using any equations why the answers to parts (a) and (b) are different.