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

An air-standard stirling cycle operates with a maximum pressure of 600 psia and a minimum pressure of 10 psia. the maximum volume of the air is 10 times the minimum volume. the temperature during the heat rejection process is 100°f. calculate the specific heat added to and rejected by this cycle, as well as the net specific work produced by the cycle. use constant specific heats at room temperature. the properties of air at room temperature are r

An engineer designs a roller coaster so that a car travels horizontally for 152 ft, then climbs 137 ft at an angle of 34.0° above the horizontal. it then moves 137 ft at an angle of 48.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)

The long handle on a rake is a(n) a. lever b. screw c. wedge d. inclined plane