Find the z -transform and its region of convergence for each of the following sequences: a) X_1[n] = delta[n] + delta [n - 5]
b) x_2[n]= (0.8)^n - 1u[n - 3]
c) x_3[n]= (-0.5)^n n[-n]
d) X_4[n]= - (0.3)^-n u[-n -1]

Aflywheel accelerates for 5 seconds at 2 rad/s2 from a speed of 20 rpm. determine the total number of revolutions of the flywheel during the period of its acceleration. a.5.65 b.8.43 c. 723 d.6.86

Slip occurs via two partial dislocations because of (a) the shorter path of the partial dislocation lines; (b) the lower energy state through partial dislocations; (c) the charge balance.

Ifa component is made of two or more materials with different modulus of elasticity (e), it is called a composite member and we calculate the factor·n". mention the formula for calculating n". also, ifn> 1, explain what will happen to the 1. transformed. gi) ifn 1, what will happen to the material when transformed material when