What factors play a role in the performance of DCmotors?
What will be an ideal response?
The performance of a DC motor depends upon entirely different factors than those impacting AC motors. The speed of a AC motor increases when the voltage increases and decreases if the field strength is increased or if there is an increase in the number of poles or turns of wire wound on the armature.?For all motors, the horsepower output is:?hp = 2 * pi * F * R * S / 33,000 or T * S / 5250?where F = force, in poundsR = radius, in feetS = speed, in rpmT = torque, in foot-pounds
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How does a thermoelectric device (TED) work?
A) Uses an electric current passed through coolant B) When electrical current flows through the module, one side is heated and the other side is cooled C) A type of resistance heating D) Using a temperature-controlled thermostat in the cooling system to control coolant temperature
A sound barrier with an STC of 50 will generally
A) block all speech and music, however loud. B) block loud music but not loud speech. C) block loud speech but not loud music. D) not block music but will block speech sufficiently to be heard only by a curious listener.
Scientists define game management as the science and art of changing characteristics and interactions of habitats, wild animal populations, and humans to achieve specific human goals by a wildlife resource
Indicate whether the statement is true or false
Most tree farms in the United States are located in the:
a. Northeast c. South b. Midwest d. Pacific Northwest