G 1. Modulation: Follow the procedure used on problems 5.8, 5.9 (Pg 443-444 in text) for the input signal m(t) = e'()u(t) in a DSB-SC modulation system with coherent detection. a. Find and plot the frequency spectra of m(t), c(t) and s(t).b. What is the minimum value of w0 that will ensure that |M(j(w-wc))| < 0.001 at w=0?c. What is the average power of the signal centered at +wc? Use Parseval’s theorem.

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