A 5.4 cm -radius horizontal water pipe is 450 m long. Water at flows at a rate of 1.0102 m3/s. Determine the pressure drop due to viscous friction from the beginning to the end of the pipe. The viscosity of water at 20 C is 1.0 103Ns/m2 . What radius pipe must you use if you want to keep the pressure difference constant and double the flow rate