the pressure in a horizontal pipe is 2.02x105 pa, and the speed of the water flowing in it is 0.40 m/s, and the diameter of the pipe is 7 centimeters. if the diameter of the pipe narrows to 2 centimeters in another section, determine the pressure in the narrow portion of the pipe., assuming that the water behaves like an ideal fluid and the density of water is 1000 kg/m3.