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A transformer winding was designed to be fed by an ac voltage of 110 V and to produce an effective current of 10.5 A. By mistake, the transformer was fed from this same voltage but rectified in a full wave converter.
Consider a lossless rectifier and no voltage drops across the connections.
Estimate what the apparent power applied to the transformer would be in both cases if its primary resistance was R = 1.8 Ω.
the efficiency of counter flow heat exchanger is given byrtco-tcithi-tciwheretcocold water outlet temperaturetcicold
Three kg of gas in a piston–cylinder assembly undergo a process during which the relationship between pressure and specific volume is py 0.5 5 constant. The process begins with p 1 5 250 kPa and V 1 5 1.5 m 3 and ends with p 2 5 100 kPa. Determine th..
1 when a computer is turned off its cpu begins to cool off. imagine that the internal energy of the cpu is given by u
Figure shows a riveted lap joint. Determine a suitable diameter for the rivets if the ultimate shear strength of the rivet material is 325 MPa and a factor of safety of 6 is to apply.
as shown in the ?gure a bar is supported by two springs and a damper. the bars left end is free to move vertically and
1. Air at po 5 1.4 bar, To 5 280 K expands isentropically through a converging nozzle and discharges to the atmosphere at 1 bar. The exit plane area is 0.0013 m2.
Experiments have shown that the transition from laminar to turbulent conditions for flow normal to the axis of a long cylinder occurs at a critical Reynolds number of ReD,c = 2 X 105, where D is the cylinder diameter.
What is the molar diffusive flux of O2 through the mem- brane? What are the molar concentrations of O2 on both sides of the membrane (outside the rubber)?
consider steady heat transfer through a 5m by 6m brick wall of a house of thickness 30cm. on a day when the temperature
A new motorcycle is being developed to meet new gas mileage standards recently passed by the federal government. An engineer tested three model designs by randomly assigning the motorcycles in a blind study (the riders recorded the mileage but did no..
A linear velocity profile was used to model flow in a laminar incompressible boundary layer in Problem 5.10. Express the rotation of a fluid particle. Locate the maximum rate of rotation. Express the rate of angular deformation for a fluid particle.
a ship has an engine that rotates clockwise when viewed from the front. it has an effective moment of inertia of 250 kg
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