Consider a real, odd, and periodic signal whose Fourier series representation may be expressed as 5
x(t)=Σ (1) Sin(kπi)
k=0 (2)

Let x(t) represent the signal obtained by performing impulse-train sampling on x(t) using a sampling period of T =0.2.

a. Does aliasing occur when this impulse-train sampling is performed on x(t)?
b. If x(t) is passed through an ideal low pass filter with cutoff frequency π/T and passband gain T, determine the Fourier series representation of the output signal g(t).

Coiled springs ought to be very strong and stiff. si3n4 is a strong, stiff material. would you select this material for a spring? explain.

Asingle-geared blanking press has a stroke of 200 mm and a rated capacity of 320 kn. a cam driven ram is assumed to be capable of delivering the full press load at constant force during the last 15 percent of a constant-velocity stroke. the camshaft has an average speed of 90 rev/min and is geared to the flywheel shaft at a 6: 1 ratio. the total work done is to include an allowance of 16 percent for friction a) estimate the maximum energy fluctuation b) find the rim weight for an effective diameter of 1.2 m and a coefficient of speed fluctuation of 0.10

During a steady flow process, the change of energy with respect to time is zero. a)- true b)- false