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We are imaging a field for NASA from a satellite. The field has vertical (sinusoidal) stripes that repeat at a rate of 1 stripe per meter. Our satellite has a CCD sensor (camera) that is 1 cm x 1 cm. This sensor has 1000x1000 pixels. The image on the sensor is (14/ z) as wide and as tall as the actual image on the ground for a height of z meters. What is the highest elevation (z) that can be achieved by the satellite such that the image of the stripes is adequately sampled? Hint: the Nyquist rate applies.
Consider the stable system represented by the differential equation: dx(t)/dt + 3x(t) = u(t) Determine the phase lag for this system if the input u(t) = sin3t.
Design a PD Controller G_c(s) = K_p + K_d*s using the root-locus method such that the closed-loop system has a damping ratio, zeta = 0.7 and a natural frequency, omega_n = 0.5 rad/sec.
A semiconductor, in thermal equilibrium, has a hole concentration of p0 = 2x1016 cm-3. The minority carrier life time = 3x10-7 s. (Assume, ni = 1010 cm-3)
Design an assembly code to open a vault (after entering the correct 4-number sequence "1234"), it displays it in the 7 segment display, than it displays the word OPEN when the correct sequence is entered.
A cylinder contains a mixture of helium and argon gas in equilibrium at a temperature of 152°C. (a) What is the average kinetic energy of each type of molecule. J/molecule (b) What is the rms speed of each type of molecule.
A linear digital filter Hd(z) is given below, and the sampling rate is T=0.1 seconds. Hd(z)=(z-j)(z+j)/(z-0.5)(z+0.5) 1. Show poles and zeros of Hd(z)in the complex z plane. Is this filterstable
What kind of wireless networking alternative makes the most sense when considering network links that span an appreciable portion of the globe?
A transmission line operating at 125 MHz has Zo = 40 Ω, α = 0.02 (Np/rn), and ß = 0.75 rad/m. Find the line parameters R', L', C', and G'.
Determine which of these properties hold or don't hold for the following discrete time systems. Justify your answers. IN each example, y(t) denotes the system output and x(t) denotes the system input.
In a 2-pole, three phase PMAC synchronous motor, the torque constant kT and the voltage constant kE are 0.6 in respective MKS units. The synchronous inductance, LS is 10 mH. The stator winding resistance per phase is 1 Ω.
An inductor rated at 4 Henrys is subjected to a sinusoidal AC voltage of 24 volts RMS, at a frequency of 60 hertza) Write the formula for calculating inductive reactance (XL), and solve for current through the inductor.
Determine the conductivity of silicon at T = 300 K if it is doped with donor impurity atoms at a concentration of 1.25*1016 cm-3. Assume that the electron and hole mobilities are 1350 cm2 / V-s and 480 cm2 / V-s, respectively.
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