For the electric circuit, given that c1=0.1 microf, c2=0.1 microf, c3=0.3 microf, and c4=0.3 microf and the total voltage drop across capacitors c1 and c2 at t=0 is v1(0)+v2(0)=120v, what is the initial energy stored in the capacitors network, w(t=0, total)?

At steady state, air at 200 kpa, 325 k, and mass flow rate of 0.5 kg/s enters an insulated duct having differing inlet and exit cross-sectional areas. the inlet cross-sectional area is 6 cm2. at the duct exit, the pressure of the air is 100 kpa and the velocity is 250 m/s. neglecting potential energy effects and modeling air as an 1.008 kj/kg k, determine ideal gas with constant cp = (a) the velocity of the air at the inlet, in m/s. (b) the temperature of the air at the exit, in k. (c) the exit cross-sectional area, in cm2