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Design a half-wave rectifier with capacitor filter to supply 40 VDC to a load of RL= 2 kΩ. Assume the rectifier is connected to a 120 VAC, 60 Hz line by a transformer. Find the turns ratio of the transformer and the capacitance if the ripple voltage is not to exceed 1% of the DC voltage.
A piston cylinder device initially contains 0.071m^3 of nitrogen gas at 140kPa and 135 degrees C. The nitrogen is now expanded to a pressure of 80kPa polytropically with a polytropic exponent whose value is equal to the specific heat ratio. Determine..
A perfect gas (methane) undergoes a reversible polytropic process in which the polytrotic exponent is 1.4. 1) Using the first law, arrive at an expression for heat transfer per unit mass solely as a function of the temperature difference (change in T..
In a chemical plant liquid ammonia is stored in a large tank at 72 degrees F and 200 psig. Ammonia is pumped from this tank to a smaller tank for chemical process usage. The pump used to supply ammonia to the process tank is located 12 ft above the s..
in a steam power plant which utilizes rankine cycle steam enters the turbine at 100 bar and 400oc. it expands with an
The crate shown is held against wedge B by a spring. The spring is 94.5% of its original uncompressed length l=2.75m, and the spring constant is given as k=1650N/m. The coefficient of static friction at all contacting surfaces is ?s=0.130. The mass o..
a dynamic system with viscous damping has mass m4 kgr and spring stiffness k5 knm. its free vibration amplitude
Kinematic viscosity (select all that apply)
The energy of the system in terms of θ and θ. The equation of motion in terms of θ and θ using Larange's equations.
estimate the flaw size responsible for the failure of a turbine rotor made from high strength steel having a yield
In a car engine gasoline (assume octane C8H18) is evaporated and then mixed with air in a ratio of 1:15 by mass. In the cylinder the mixture is at 750 kPa, 650 K when the spark fires. For that time find the partial pressure of the octane and the spec..
air is compressed in an insulated system from an initial volume and density of 0.42 m3 and 1.11 kgm3 respectively to a
the 2-kg ball rests between the 45 degree grooves a and b of the 10 degree inlcine and against a vertical wall at c. if
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