One of the first chemicals used to kill plants was:
a. 2-4D c. Rubbing alcohol
b. Sawdust d. Salt
D
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An RC filter has impedances Z1 = R1 =1k? and Z2 = 1/(j?oC) with C=1µF connected in series and an input voltage vIN(t)= 20 sin (2?fot) V with ?o=1,000 rad/s. If the voltage across Z2 is v0UT(t), the amplitude of vOUT(t) equals _____(x.xx) V.
Fill in the blank(s) with the appropriate word(s).
Which control algorithm is typically used in HVAC equipment when the controlled variable changes slowly over time?
a. P b. PI c. PID d. PIE
Valve timing refers to:
A. How long the valves are held open B. The relationship between cam and crank rotation C. The relationship between how long a valve is open compared to closed D. None of these
Most automotive circuits, except for some ignition components, use ________ wire
A) Alternative B) Secondary C) Primary D) None of these