The accompanying figure shows the torque-graph for a single loop armature. Draw or describe the orientation of the armature at each point where the torque reaches a minimum or maximum. Also, please explain why the armature continues to move through the point where the torque reaches a minimum.
The plane of the armature should be parallel to the vertical axis at each torque minimum. The plane of the armature should be parallel to the horizontal axis at each torque maximum. It is the momentum of the armature that carries it through the point where the torque is zero.
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In early 19th-century America, the
A. annual population growth rate was much higher than in colonial days. B. urban population was growing at an unprecedented rate. C. birthrate was rapidly declining. D. death rate was increasing. E. United States had become the most populous nation in the western world.
The greater the concentration of dissolved solids in an HVAC system's water, the greater the potential for _____.
a. foaming b. temperature fluctuations c. corrosion d. electrolysis
The emergency heat setting on a heat pump thermostat:
A) Operates both the compressor and auxiliary heat to produce the maximum amount of heat possible. B) Increases the compressor speed to produce more heat. C) Energizes the auxiliary heat on first stage and does not turn on the compressor and outdoor fan. D) Notifies the installing contractor that the system needs immediate service.
Given a set of steps with standard-size bricks used to cover the riser and tread surfaces of a flight of concrete stairs if each tread measures 12" deep by 48" wide and each riser is 8" high, what is the area in square feet of four risers rounded to hundredths? (Refer to the diagram on page 63 in the book.)
What will be an ideal response?