The speed of an AC induction motor is determined by:
A) The voltage applied to the armature.
B) The number of poles and the frequency of the alternating current.
C) The number of turns in the motor winding.
D) The voltage of the field windings.
B
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A RC circuit consists of a series connection of a 120-V source, a switch, a 34-M? resistor and a 15-?F capacitor. The circuit is used in estimating the speed of a horse running a 4 km racetrack. The switch closes when the horse begins and opens when the horse crosses the finish line. Assuming that the capacitor charges to 85.6 V, calculate the speed of the horse.
What will be an ideal response?
____________________ mites lodge in the air passages of adult bees and suffocate them.
Fill in the blank(s) with the appropriate word(s).
Not including friction, what is the static discharge head for a water line thirty feet high?
What will be an ideal response?
Which knot is used to tie off a ladder halyard?
a. sheepshank b. bowline on a bight c. clove hitch d. figure eight