Water flowing out of the horizontal pipe emerges via a nozzle. The radius of pipe is 2.1 cm, and the radius of the nozzle is 0.47 cm. The speed of the water in the pipe is 0.67 m/s. Treat the water as an ideal fluid, and finds out the absolute pressure of the water in the pipe. (The atmosphere pressure is P = 101000 Pa, and the density of water is around 1000 kg/m^3.)