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An axial-flow pump has a stator blade positioned upstream of the impeller, and it provides an angle α1 = 60° to the flow. The radius of the impeller tip is 285 mm, and the hub radius is 135 mm. Determine the required average blade angle at the exit of the impeller if the pump is to deliver 0.57 m3 /s of water with a theoretical head rise of 2.85 m. The rotational speed is 1500 rpm.
Two transistors, fabricated with the same technology but having different junction areas, when operated at a base emitter voltage of 0.75V, have collector currents of 0.2mA and 5mA. A. Find Is for each device.
AC Circit analysis and max power transfer, If the output impedance of a certain driving circuit is 50 Ohm - j10 Ohm, what value of load impedance will result in the maximum power to the load?
A steady voltage of 0.75V is applied to an op amp integrator having component values of R = 200 k and C =2.5 μF. Assuming that the initial capacitor charge is zero, determine the value of the output voltage 100 ms after application of the input.
discharge a capacitor of 1mF charged with a voltage of 1 volt we connect it, at time t = 0, with a esistor of R ohm. When we measure the voltage we find it to be V(r) (t) = e ^(-t) u(t). Determine the resistance of R. If the capacitor has a capaci..
Plot the signal x(n) 0
The transmit antenna gain is 2.1dB, and the receive antenna gain is 1.6dB. The received is 18Km away from the transmitter. The receiver has a Noise Figure of 8dB, Bandwidth 1.7 MHz and the Data Rate is 640K bps. You may assume T0 = 290K.
What is the atomic symbol for Silicon? Sketch a diagram showing the electron orbital structure of the Silicon atom.Explain with the aid of a diagram how Silicon atoms combine to form a stable lattice structure.
A filamentary conductor is formed into an equilateral triangle with sides of length l carrying current I. Find the magnetic field intensity at the center of the triangle.
The problem should be because Martians were using a non-decimal number system. Therefore, "50" is not fifty, but "50" in base b (50b=5×b+0×1=5b). The explorers reflected on the way in which Earth's number system developed.
When we discussed the work of Galvani and Volta, we noted that Galvani's work was not fully appreciated until the development of instruments capable of detecting and amplifying the small biopotentials present in living organisms.
On a certain aircraft, the main control circuit on an autopilot fails with probability p. A redundant backup circuit fails independently with probability q. The aircraft can fly if at least one of the circuits is functioning.
State two disadvantages of Time Graded Protection systems. What is the preferred secondary current rating of a CT for a Differential Protection System? why is this rating preferred
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