For each of the following difference equations (i) (ii) (iii) use the method of recursion to solve the following problems: (a) Compute y[n] for when for all n and (b) Compute y[n] for when and (c) Compute y[n] for when and y[-1] = 2. x[n] = u[n]n = 0, 1, 2, y[-1] = 0.x [n] = u[n]n = 0, 1, 2, y[-1] = 2.x [n] = 0n = 0, 1, 2, y[n + 1] - 0.8y[n] = x[n] y[n + 1] + 0.8y[n] = x[n]

Acompressor receives the shaft work to decrease the pressure of the fluid. a)- true b)- false

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

Apipe with an outside diameter of 15 cm is exposed to an ambient air and surrounding temperature of -20°c. the pipe has an outer surface temperature of 65°c and an emissivity of 0.85. if the rate of heat loss from the pipe surface is 0.95 kw per meter of length, the external convective heat transfer coefficient (h) is: (a) 12.5 w/m"k (b) 18.6 w/mk (c) 23.7 w/mk (d) 27.9 w/mk (e) 33.5 w/mk