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Determine the maximum shearing stress and elongation in a helical steel spring composed of 20 turns of 20-mm-diameter wire on a mean radius of 90 mm when the spring is supporting a load of 1.5 kN. G = 83 GPa.
A particular diode was measured to have VD = 0.62 V at ID = 5.895 mA. Determine the following: a) the reverse saturation current IS. b) VD for a forward current of 100 mA. Assume VT = 25 mV.
A certain engine lathe can be purchased for $330,000 and depreciated over three years to a zero salvage value with the SL method. This machine will produce metal parts that will generate revenues of $220,000 (time zero dollars) per year.
A turnstile antenna consists of two crossed dipole antennas. in this case, located in the x-y plane - the dipoles are also identical and lie on the x and y axes respectively and are both fed at the origin assume the equal currents are supplied
A piston-cylinder device initially contains 1 m of nitrogen gas at 400kpa and 27 c. A resistance heater is turned on inside the cylinder which passes 70 kj of electricity to the nitrogen gas.
Design a 2-bit counter that, when f = 1, counts in the repeating sequence: 0, 2, 3, and when f = 0, counts in the reverse direction. Use T flip-flops. (a) Construct a state diagram or state table.
What are two of the major considerations that factor in the design of a substation. Give a couple of examples of station layouts where these factors are clearly demonstrated. What typical grounding materials are used in substations.
in a RLC series circuit R=500Ω L=0.4mH and C=100pF the circuit is connected to the terminals of an ac source with an rms voltage of 1V, and a variable frequency calculate the following A) resonant frequency
A balanced three-phase distribution line has an impedance of 1+j8 I per phase. This line is used to supply 3 balanced three-phase loads that are connected in parallel. The 3 loads are L1= 120 kVA at 0.96 leading pf, L2= 180 kVA
(1) After writing the equations for mesh analysis, what parameters will be calculated How can the results be used to determine the branch currents (2) When working with Thevenin's, list the steps for solving for Vth and Rth.
An amplifier with 40 dB of small-signal open-circuit voltagegain, an input resistance of 1M-ohm ,and an output resistance10-ohm drives a load of 100-ohm .What voltage and power gains(expressed in dB) would you expect with the load connected
Consider an Internet video conferencing application. Assume that the compressed video streams are packetized, and that a packet is either lost (due to over long delay or mis-delivery or detected bit errors within a packet) or received intact.
Compute the amount of time required to deliver 10 frames to the receiver with stop-and-wait flow control. Assume that all frames and ACKs are received correctly.
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