Compute the Fourier transform of each of the following signals:. (a) x[n] = u[n - 2] - u[n - 6] (b) x[n] = (1/2)^-n u[-n - 1] (c) x[n] = (1/3)^|n| u[-n - 2] (d) x[n] = 2^n sin (pi/4 n) u[-n] (e) x[n] = (1/2)^|n| cos (pi/8(n - 1)) (f) x[n] = {n, -3 ≤ n ≤ 3 0, otherwise (g) x[n] = sin (pi/2 n) + cos (n) (h) x[n] = sin(5 pi/3 n) + cos (7 pi/3 n) (i) x[n] = x[n - 6], and x[n] = u [n] = u[n] - u[n]- - 5] for 0 ≤ n ≤ 5 (j) x[n] = (n - 1) (1/3)^|n| (k) x[n] = (sin (pi n/5)/pi n) cos (7 pi/2 n)

Have a greater impact on maintenance productivity than any other support group. (clo5) a)-the top management b)-inventory and purchasing c)-sub-contracting d)-cmms

A3-mm-thick panel of aluminum alloy (k 177 w/m-k, c 875 j/kg-k and ? = 2770 kg/m) is finished on both sides with an epoxy coating that must be cured at or above t,-150°c for at least 5 min. the production line for the curing operation involves two steps: (1) heating in a large oven with air at ts,0-175°c and a convection coefficient of h, 40 w/m2. k, and (2) cooling in a large chamber with air at 25°c and a con- vection coefficient of he 10 w/m2.k. the heating portion of the process is conducted over a time interval te which exceeds the ime required to reach 150°c by 5 min (h = r + 300 s). the coating has an emissivity of ? = 0.8, and the temperatures of the oven and chamber walls are 175 and 25°c, respectively. if the panel is placed in the oven at an initial temperature of 25°c and removed from the chamber at a safe-to-touch tempera ture of 37°c, what is the total elapsed time for the two-step curing operation?

Different between right hand turning tool and left hand turning tool ?