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A gas occupying a volume of 25 ft3 weights 3.5 lbs on the moon, where the acceleration of gravity is 5.47 ft/s2. Determine its weight, in lbf, and density, in lb/ft3, on Mars, where g= 12.86 ft/s2.
Find the surge impedance load and based on the practical line loadability determine the number of three phase,60 Hz lines required to transmit this power, with one line out of service.
A) the required step-up voltage ratio for satisfactory performance. B) the voltage ratio of a standard buck-boost transformer that most closely meets the requirements of the load. C) the voltage at the load with the buck-boost transformer installed.
A glass tube with a cross-sectional area of 9^-2 m^2 contains an ionizd gas. The densities are 10^15 positive ions/m^ and 10^11 free electrons/m^3. Under the influence of an applied voltage, the postive ions are moving.
Three -phase motor is connected to a three-phase power source that has an abc phase sequence. the first load is a wye-connected, three-phase motor withdrawing a line current of 20A at a 0.8 lagging power factor.
A 460-V, three-phase,60-Hz system supplies power to a 10-kVA, delta-connected resistor load; a 50-kVA, 0.86 power factor induction motor, and a wye-connected synchronous motor that is operating at 0.62 power factor leading
Given a network using slotted Aloha multiple access protocol with N users and each user attempting to access the channel with probability P. It is safe to assume that each user always has a frame of data to send and that it uses access probability
The axis of the cylinder is along the z axis, and the electrons are moving with a velocity vector v in the positive z direction. The velocity of the electrons is 0.1c where c is the speed of light (2.99792458 ´ 108 [m/s]). The magnitude of the cur..
What is the propagation delay fora 2 level 16-bit adder, using 4-bit carry look aheads and what are the components of the delay Assuming each gate introduces a unit time propagation delay.
given as E= 100 a -200 af +300 az V/m. Determine the incremental work required to move a 20µC charge a distance of 6µm: (a) in the direction of a ; (b) in the direction of af ; (c) in the direction of az ; (d) in the direction of E ; (e) in the di..
A storage tank has a Diameter of 20ft and a height of 10ft. The output volumetric flow from this tank is given by fout(t)=2h(t) where h(t) is the height of the liquid in the tank. At a particular time the tank is at steady state with an input flow..
A certain two-terminal circuit has an open-circuit voltage of 9V . When a R = 225-r load is attached, the voltage across the load is 7V . Determine the Thevenin resistance for the circuit.
Calculate the percentage of electricity generation by these fuel-cell systems compared to the annual electricity generation in the U.S. of 3.8x109 MW-hrs
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