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A 10-hp, 230-V shunt-wound motor has a rated speed of 1,000 r/min and full-load efficiency of 86 percent. Armature-circuit resistance is 0.26 Q; field-circuit resistance is 225 Q. If this motor is operating under rated load and the field flux is very quickly reduced to 50 percent of its normal value, what will be the effect upon counter emf, armature current, and torque? What effect will this change have upon the operation of the motor, and what will be its speed when stable operating conditions have been regained?
a room in the lower level of a cruise ship has a 30cm diameter circular window.if the midpoint of the window is 4m
an airplane a takes off as shown with a constant speed equal to v110kmh. the path of the airplane is described in the
a tractor-trailer is traveling at 60 mih when the driver applies his brakes. knowing that the braking forces of the
a riser in the shape of a sphere is to be designed for a sand casting mold. the casting is a rectanglar plate with
Put together a team of five students from your class. Using the 10-stage design process, have your team develop a carrying mechanism for Rollerblades and/or your shoes when one is not in use.
The literature review on fabrication and construction of a modified Co 2 single stroke positive displacement pump driven with electric motor
a stress gauge located at c on the surface of the bone ab indicates that the average normal stress in the bone is 3.80
With justifications for your choice, identify any axes of symmetry or asymmetry in the model and describe in words the conditions you would apply at these boundaries to produce a reduced symmetry model with smaller geometry.
consider a carnot refrigeration cycle with a working fluid of r-134a operating between temperatures of -10oc and 20oc.
What is the angular velocity Wcd (t)?
a 100 pound ball is suspended from a wall by a rope that is pulled asided by a horizontal rope B and held so that rope A makes a angle of 30 degrees with the vertical wall. Find the tension in ropes A and B?
a water reservoir 500 m by 500 m by 2 m deep located on a hill supplies water to a town at a gauge pressure of 500 kpa.
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