Two large plane surfaces are 2.8 cm apart. the space between the surfaces is filled with glycerine. what force is required to drag a very thin plate of surface area of 0.6 m^2 between the two large plane surfaces at a speed of 1.5 m/s, if (i) the thin plate is in the middle of the two plane surfaces, and (ii) the thin plate is at a distance of 0.7 cm from one of the plane surfaces? assume the kinematic viscosity ofglycerine is 1.19×10^-3 m^2/s

Coiled springs ought to be very strong and stiff. si3n4 is a strong, stiff material. would you select this material for a spring? explain.

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

An air compression refrigeration system is to have an air pressure of 100 psia in the brine tank and an allowable air temperature increase of 60°f for standard vapor compression cycle temperatures of 77 f entering the expansion cylinder and 14 f entering the compression cylinder, calculate the coefficient of performance a. 2.5 b 3.3 c. 4.0 d. 5.0