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Consider a three-phase bridge supplying a wye-connected load in which the a- phase, b- phase, and c- phase resistances are 2, 4, and 4 Ω , respectively. Given that the dc supply voltage is 100 V and the control strategy is six-step operation, sketch the a- phase line-to-neutral voltage waveform.
at a particular location in the ocean the temperature near the surface is 80of and the temperature at a depth of 1500
R-134a enters the condenser of a refrigerator at 800kPa and 50oC at a rate of 0.018kg/s and leaves at 800kPa as a saturated liquid. It is known that the compressor consumes 1.2kW of electricity at this operating condition. Determine 1) heat rejection..
a large flywheel weighs 3000 kg and has a radius of gyration of 1 m. it is observed that 10 min is required for the
Evaluate the valve closure to achieve a water exit velocity
the 2 mg car is being towed by a winch. if the winch exerts a force of t125s on the cable where 13m is the displacement
oxygen is adiabatically and reversibly expanded in a nozzle from 200 psia and 600degf to 70 psia. determine the
Describe the differences among the three PLC types : rack/slot address based, tag based, and soft PLCDescribe the differences among the three PLC types : rack/slot address based, tag based, and soft PLC.
In the an ideal turbo jet, the engine is designed such that the turbine work is divided equally between the compressor and the propeller. The gas from the turbine discharges to a nozzle for additional thrust.
air contained in a piston-cylinder assembly contains air initially at 2 bar 300 k and a volume of 2 m3. the air
a power plant burns 1000 kg of coal per hour to produce a net output of 500 kw of electrical power. assuming each kg of
saturated liquid water at 20 degree celsius enters a mixing chamber at a rate of 2.5kgs. at the same time hot water
Calculate the service factor for a simple lawn mower driven by a two stroke engine. The lawn mower is used by a service for 8 hours per day. If the lawnmower normally operates at 1200 rpm and 2 hp what is the starting torque?
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