Oil being pumped inside a 10 mm diameter pipe at Reynold’s number of 2100. The oil density is 855 kg/m3 and viscosity of 2.1 x 10-2 Pa-s. What is the velocity in the pipe? It is desired to maintain the same NRA and the same velocity using a second fluid with a density of 925 kg/m3 and a viscosity of 1.5 x 10-2 Pa-s. What pipe diameter should be used?