Letm(t) = sinc2(t) andmh(t) be its hilbert transform. denote the upper side band modulatedwaveform asxusb(t) =am(t) cos(2000πt)−amh(t) sin(2000πt)

(a) sketch the fourier transforms ofm(t) andmh(t).

(b) sketch the fourier transformx(f) of the complex baseband ofxusb(t) with respectto carrier frequency 1000.

Which of the following ziegler nichols tuning methods the response of the controller to a step input should exhibit an s-shaped curve? a)-open loop mode b)-closed loop mode c)-both modes (open & closed) d)-none of the modes (open & closed)

How much power could a wind turbine produce if it had the following specifications? cp = 0.45 -d=1.2kg/m3 d=50m v 5m/s

Atank with constant volume contains 2.27 kg of a mixture of water phases (liquid-vapor). in the initial state the temperature and the quality are 127 °c and 0.6, respectively. the mixture is heated until the temperature of 160 oc is reached. illustrate the process in a t-v diagram. then, determine (1) the mass of the vapor in kg at the initial state, (2) the final pressure in kpa.