The following are the impulse responses of discrete-time LTI systems. Determine whether each system is causal and/or stable. Justify your answer a.  h[n]=(1/5)nu[n]h[n]=(1/5)^n u[n]

b. h[n]=(0.8)nu[n+2]

c. h[n]=(½)nu[−n]

d. h[n]=(5)nu[3−n]

When using the ohmmeter function of a digital multimeter, the leads are placed in what position relative to the component being tested? a. parallel b. control c. series d. line

Aquick transition of the operating speed of a shaft from its critical speed will whirl amplitude. (a) increase (b) limit (c) not affect (d) zero

Avolume of 2.65 m3 of air in a rigid, insulated container fitted with a paddle wheel is initially at 264 k, 5.6 bar. the air receives 432 kj by work from the paddle wheel. assuming the ideal gas model with cv = 0.71 kj/kg • k, determine for the air the amount of entropy produced, in kj/k