Pipe diameter and reynolds number. an oil is being pumped inside a 10.0-mm-diameter pipe at a reynolds number of 2100. the oil density is 855 kg/m3 and the viscosity is 2.1 × 10−2 pa · s. what is the velocity in the pipe? it is desired to maintain the same reynolds number of 2100 and the same velocity as in part (a) using a second fluid with a density of 925 kg/m3 and a viscosity of 1.5 × 10−2 pa · s. what pipe diameter should be used?

Water at 70°f and streams enter the mixing chamber at the same mass flow rate, determine the temperature and the quality of the exiting stream. 0 psia is heated in a chamber by mixing it with saturated water vapor at 20 psia. if both streams enters the mixing chamber at the same mass flow rate, determine the temperature and the quality of the existing system.

During a steady flow process, the change of energy with respect to time is zero. a)- true b)- false

For the closed feedwater heater below, feedwater enters state 3 at a pressure of 2000 psia and temperature of 420 °f at a rate of ix10 ibhr. the feedwat extracted steam enters state 1 at a pressure of 1000 psia and enthalpy of 1500 btu/lbm. the extracted er leaves at an enthalpy of 528.7 btu/lbm steam leaves as a saturated liquid. (16) a) determine the mass flow rate of the extraction steam used to heat the feedwater (10) b) determine the terminal temperature difference of the closed feedwater heater