Arotating machine of mass 100 kg sits on an elastic foundation comprised of a spring and a damper. the spring stiffness is 100 kn/m and the damping ratio is 0.25. the machine spins at 1900 rpm with an unbalance of 0.05 kg-m (a) determine the steady-state amplitude of vibration of the machine. (b) compute the force transmitted to the ground by the spring. (c) compute the force transmitted to the ground by the damper (d) compute the force transmitted to the ground by the spring and damper together

On a average work day more than work place firs are reorted

Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor at -26°c with a volumetric flow rate of 0.18 m3/s. refrigerant exits at 9 bar, 70°c. changes in kinetic and potential energy from inlet to exit can be ignored. determine the volumetric flow rate at the exit, in m3/s, and the compressor power, in kw.

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