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Consider the 3-hp induction motor whose parameters are listed in Table 6.10-1. Plot the torque-speed and dc current-speed curves if it is being fed from a three phase bridge in six-step operation, assuming that the dc voltage is 560 V and the frequency is 120 Hz. Neglect harmonics.
a dish of liquid water is placed on a table in a room. after a while all of the water evaporates. taking the water and
What will the ratio of the angle of twist be to that of the hollow shaft if the maximum shear stress in the material of 75 N / mm ^2 and what is the ratio of actual permissible shear stress?
basically a block is slid down from left side of the circle and when it reaches the middle of the bottom the speed of
Thirty percent of the jet passes through the slot. The rest splits symmetrically along the barrier. Calculate the horizontal force F needed to hold the barrier per unit thickness into the paper.
Design a box that will contain a 4 in. x 6 in. x 3 in. volume. The box should be produced from two pieces of sheet metal and require no tools or fasteners for assembly. Repeat the problem, but design the box from a single sheet of metal.
moist air at 30 degrees c 2 bar and 50 relative humidity enters a heat exchanger operating at steady state with a mass
major league baseball training camps are now just beginning. given a baseball with a mass of 9 ounces estimate the work
the water side of the wall of a 70-m long dam is quarter circle with radius of 7-m. determine the hydrostatic force on
Is it possible for one object to gain mechanical energy from another without touching it?
The pilot of an airplane reads the altitude 3000 m and the absolute pressure 58 kPa when flying over a city. Calculate the local atmospheric pressure in that city in kPa and in mm Hg.
Neglect any friction and determine the torque M on the worm shaft required to generate a compressive force C in the press for the position
What general conclusions can you draw?
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