11.45. Suppose at a place 20N latitude the atmospheric pressure is 1.3 kg/m. Calculate v for a pressure gradient of 3 millibars/m over 100 km from the center of a low-pressure region. Graph the velocity, with and without centripetal acceleration, versus the pres- sure gradient.. 11.46. Repeat Problem 11.45 if the pressure gradient is from a high-pressure region. 10 N/m2 and the ar density is