7) Pipe diameter is 2.5m, average velocity is 5.5m/s. fluid viscosity is 0.001Pas, density is 1000kg/m3, the Reynolds number is 1, A O) 1800; B O) 50000 ; C O) 1.5106; D OX) 1.375106 E XO) none this fluid is 2, A O) a laminar flow; B O) transition flow; CX O) turbulent flow 8) A centrifuge bowl with 200mmID (internal diameter) is turning at 3500r/min. It contains a layer of aniline 55mm thick. If the density of aniline is 1002kg/m3 and the pressure at the liquid surface is atmospheric, 1. returning angular velocity is A OX) 366.5rad/s;B6798rad/s;C O)3667; D O) none 2. The gauge pressure exerted on the wall of the bowl A O) 2348 Pa, B OX)536737 Pa; C O) 459 Pa; D O) none