Athree-phase, y-connected, 460-v, 60-hz, 8-pole, wound-rotor induction motor has the following parameters at standstill: rotor impedance is 0.22 + j0.53 ω/phase and negligible stator impedance. determine the breakdown slip the breakdown torque the power developed at breakdown slip the starting torque the resistance that must be inserted in series with the rotor circuit so that the starting torque is 50% of the maximum torque.

Afluid flows with a velocity field given by v=(x/t)i.. determine the local and convective accelerations when x=3 and t=1.

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

Slip occurs via two partial dislocations because of (a) the shorter path of the partial dislocation lines; (b) the lower energy state through partial dislocations; (c) the charge balance.