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A 115-V shunt motor develops 21 Ib-ft when the armature current is 12 A. As the load on the motor is increased, the developed torque increases to 50 Ib-ft. Find the armature current required to produce the increased torque.
an ideal gas is compressed from a volume of 400 cm3 to a volume of 150 cm3 slowly and isothermally in a
At a section in a passage, the pressure is 150 kPa (abs), the temperature is 10 deg C, and the speed is 120 m/s. For isentropic flow of air, determine the Mach number at the point where the pressure is 50 kPa (abs). Sketch the passage shape.
r-134a fills a 0.1 m3 capsule at 20oc 200 kpa. it is placed in a deep freezer where it is cooled to -10oc. the deep
the 2 Mg car increases its speed uniformly from rest to 25 m/s in 30s up the inclined road. determine the maximum power that must be supplied by the engine, which operates with an efficiency of 0.8. also, find the average power supplied by the eng..
a engineer designs a heat engine using flat-plate solar collectors. the collectors deliver aeat at 70 degrees c and
what is the primary growth front? what is the secondary growth front? what happens when they approach each other? what
a specimen of aluminum having a rectangular cross section 9.7 mm times 12.4 mm0.3819 in. times 0.4882 in. is pulled in
vinegar is a solution of acetic acid dissolved in water. a 5.54 g sample of vinegar was neutralized by 30.10ml of .100
piston and flywheelconsider the one-cylinder four-stroke engine assembly shown in figure 1. the mass of the piston p is
Determine the mode shapes and frequencies of vibration of the system of cars by Sweeping the rigid body mode
your company wants to launch a new product. rampd including prototypes and manufacturing process development will take
two charges -18 c and 4.9 c are fixed in place and separated by 4.2 m. a at what spot along a line through the charges
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