Uma carga elétrica trifásica equilibrada cuja impedância ZAB=10+j15 Ω está ligada em triângulo e é alimentada por um gerador trifásico equilibrado por meio de condutores cuja impedância é desprezível. A sequência de fase do gerador é ABC e a tensão de linha VAB é igual 380 V fase zero. A corrente de linha IA e de fase IAB valem: A) 48,76<-16,90 A; 16,25<-46,90 A B) 36,51<-86,31 A; 12,17<-56,31 A C) 36,51<-86,31 A; 21,08<-56,31 A D) 63,24<-86,31 A; 21,08<-56,31 A E) 36,51<-56,31 A; 12,17<-86,31 A

If you were designing a bumper for a car, would you prefer it to exhibit elastic or plastic deformation? why? consider the functions of a bumper in both a minor "fender-bender" and a major collision.

Apump is used to circulate hot water in a home heating system. water enters the well-insulated pump operating at steady state at a rate of 0.42 gal/min. the inlet pressure and temperature are 14.7 lbf/in.2, and 180°f, respectively; at the exit the pressure is 60 lbf/in.2 the pump requires 1/15 hp of power input. water can be modeled as an incompressible substance with constant density of 60.58 lb/ft3 and constant specific heat of 1 btu/lb or. neglecting kinetic and potential energy effects, determine the temperature change, in °r, as the water flows through the pump.

An air conditioning system consist of a 5 cm diameter pipe, operating at a pressure of 200 kpa. the air initially enters the pipe at 15°c with a velocity of 20 m/s and relative humidity of 80%. if the heat supply throughout the process is 960 w, determine the relative humidity and the temperature at the outlet