If the contacts of a current relay remain closed after the motor has reached operating speed, what will likely result?
What will be an ideal response?
The start winding will remain energized and high current will occur.
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Problem 1.62 Two brass rods AB and BC, each of uniform diameter, will be brazed together at B to form a non-uniform rod of total length 100 m that will be suspended from a support at A as shown. Knowing that the density of brass is 8470 kg/m3, determine (a) the length of rod AB for which the maximum normal stress in ABC is minimum, (b) the corresponding value of the maximum normal stress.
Consider an insulated chamber with two equally sized compartments which are separated from each other by a removable partition. Initially one of the compartments is assumed to be evacuated completely, while the other is filled with a mole of an ideal gas under standard atmospheric conditions. Now consider that the partition is removed so that the gas can expand to fill the two chambers.
(a) Will there be a change in the temperature of the gas? Explain. (b) Compute the entropy change. (c) Compute the Gibbs free?energy change. Is the magnitude of this change significant? Explain.
Most of today's audio/video systems can be diagnosed with a(n) ____ since the system will set fault codes when a failure is determined.
A. DMM B. scan tool C. shop policies D. test antenna
What units are most commonly used to measure heat intensity in the United States?
A) BTUs B) Joules C) Degrees Fahrenheit D) Kilocalories