If vi(t)=15cos(ωt)v, what is the steady-state expression for vo when ω=ωc? suppose that vo(t)=aocos(ωt+ϕ), where ao> 0 and −180∘< ϕ≤180∘. determine the values of ao, ω, and ϕ. express your answers using three significant figures separated by commas. express ao in volts, ω in radians per second, and ϕ in degrees.

An open feedwater heater operates at steady state with liquid entering at inlet 1 with t? = 40°c and pl = 1 .2 mpa. water vapor att2-200°c and p2 = 1.2 mpa enters at inlet 2. saturated liquid water exits with a pressure of pa 1.2 mpa. neglect heat transfer with the surroundings and all kinetic and potential energy effects, determine the mass flow rate of steam at inlet 2 if the mass flow rate of liquid water at inlet 1 is given as 2 kg/s.