A 12.47 kV, three-phase distribution feeder is 1.9 miles long and can wheel up to 5.5 MVA. Oriole conductors were hung using an equilateral triangular spacing scheme, with conductor spacing of only 6 inches. 1. Considering the very narrow spacing between conductors, determine whether a short t-line model is sufficient to represent the feeder or if a medium model is required. Do so by comparing the ABCD coefficients for each model, expressed in SI units. Assume a 25 °C operating temperature.
2. Using the most appropriate model, calculate the voltage regulation when a rated load with 0.95 lagging power factor is attached.

Amass of m 1.5 kg of steam is contained in a closed rigid container. initially the pressure and temperature of the steam are: p 1.5 mpa and t 240°c (superheated state), respectively. then the temperature drops to t2= 100°c as the result of heat transfer to the surroundings. determine: a) quality of the steam at the end of the process, b) heat transfer with the surroundings. for: p1.5 mpa and t 240°c: enthalpy of superheated vapour is 2900 kj/kg, specific volume of superheated vapour is 0. 1483 m/kg, while for t 100°c: enthalpy of saturated liquid water is 419kj/kg, specific volume of saturated liquid water is 0.001043m/kg, enthalpy of saturated vapour is 2676 kj/kg, specific volume of saturated vapour is 1.672 m/kg and pressure is 0.1 mpa.

What difference(s) did you notice using a pneumatic circuit over hydraulic circuit.explain why the pneumatic piston stumbles when it hits an obstacle.

Aflywheel accelerates for 5 seconds at 2 rad/s2 from a speed of 20 rpm. determine the total number of revolutions of the flywheel during the period of its acceleration. a.5.65 b.8.43 c. 723 d.6.86