Determine which of the properties listed in Problem 1.27 hold and which do not
hold for each of the following discrete-time systems. Justify your answers. In each
example, y[n] denotes the system output and x[n] is the system input.
(a) y[n] = x[ -n] (b) y[n] = x[n- 2] - 2x[n- 8]
(c) y[n] = nx[n] (d) y[n] = 8v{x[n - I]}
{
x[n], n ~ 1 { x[n], n ~ 1
(e) y[n] = 0, n = 0 (f) y[n] = 0, n = 0
x[n + 1], n ~ -1 x[n], n ~ - 1
(g) y[n] = x[4n + 1

The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false

Afour cylinder four-stroke in-line engine has a stroke of 160mm, connecting rod length of 150mm, a reciprocating mass of 3kg and its firing order is 1-3-4-2. the spacing between cylinders is 100mm. i. show that the engine is in balance with regard to the primary inertia forces and primary 3. a and secondary inertia couples. li determine the out of balance secondary inertia force ii. propose ways of balancing this out of balance force and discuss the challenges that will arise

The filament of an incandescent lamp has a temperature of 2000k. calculate the fraction of radiation emitted in the visible light band if the filament is approximated as blackbody