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A steel wire 30 ft long, hanging vertically, supports a load of 500 lb. Neglecting the weight of the wire, determine the required diameter if the stress is not to exceed 20 ksi and the total elongation is not to exceed 0.20 in. Assume E = 29 × 106psi.
A random sample of 50 measurements on a certain thread gave a mean breaking strength of 210 grams and a standard deviation of 18 grams. Should this thread be used on the garments?
A wafer 100mm in diameter is mounted in an electron-beam evaporation system in which spherical radius is 40cm. Estimate the worst case variation in film thickness between the center and edges of the wafer for an evaporated aluminium 1micro meter t..
At first glance the FFT filters appear not to be "causal" as the output signal - the pulse response - seems to appear before the input signal - the δ-pulse - appears at the output. Why can the computer not do this differently?
Three resistors R1, R2 and R3 are connected in series and a supply voltage of 240 V. If R2 = 2R1, R3 = 3R1 and the total power taken by the circuit is 480 watts. Calculate the power in each resistor.
A circuit consists of a current source, i=0.030 sin 500t, in parallel with L=20mH, C=50 micro Farads and R=25 Ohms. a. Determine the voltage V across the circuit. b. Solve for the power factor of the circuit.
A magnetic needle free to rotate in a vertical plane orients itself vertically at a certain place on the Earth. What are the values of (i) horizontal component of Earth's magnetic field and (ii) angle of dip at this place?
Obtain the optimum tap weights for a three-tap MMSE equalizer and at a SNR of 10 dB and b = 0:5.
If Nand gates are used throughoutand a ripple-carry design is used, calculate the delay through the adder, assuming allinputs are presented at the same instant, and counting D seconds per gate. Which outputsignal suers the worst delay
In electric motor delivers 23 hp of mechanical power into a load it runs on single phase 440 VAC and is 83 percent efficient its running power is .77 and the starting current is 70 percent higher than its running current
Problem 1. Explain the purpose of the capacitor in the microphone circuit.
Design a logic circuit with 4 inputs A, B, C & D that will produce output '1' only whenever two adjacent input variables are 1's. A & D are also to be treated as adjacent, implement it using universal gate.
The line current is 51 A and the shunt-field resistance is 120 ohm. If the armature resistance is 0.1 ohm, calculate the speed if the shunt-field resistance is doubled at no load condition. Suppose the terminal voltage VT does not change.
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