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1. SiO2 can be either a glass or a crystalline solid at room temperature. Is diffusion faster in vitreous (glassy) silica or crystalline silica? Why?
2. Consider the diffusion of C into Fe. At approximately what temperature would a specimen of Fe have to be caburized for 2 hours to produce the same diffusion result as at 900*C for 15 hours?
3. A candidate material for a turbine blade application oxidizes by diffusion of metal atoms through the oxide to the metal surface, where metal and oxygen react to form the oxide. After 10 hours at 550*C, an oxide layer 8µm thick has formed. What will the thickness be after 100 hours?
1.How is crude oil formed ?How is it found/discovered ? 2.How is natural gas formed? (Start with plankton) and include crude oil formation.
For a unity feedback system with forward path transfer function (Open-loop transfer function) as follows G(s) = 5000/ s(s + 75) derive closed-loop transfer function
Compute the maximum and minimum spectral frequencies received by a mobile traveling at a speed of 100 Km/hr. What is the frequency of the received signal if the mobile is moving in a direction perpendicular to the direction of arrival of the trans..
Sketch the Capacitance-Voltage characteristics for both devices based on part (d) by giving appropriate labeling to the voltage and capacitance axis. You may assume high f measurements.
A Si p+-n junction has the following parameters at 300K: taup = taug = 10-6 s, ND=1015 cm-3, and NA=1019 cm-3. Plot diffusion current density, generation current (Jgen) and total reverse current (JR) as a function
A single phase 1750 RPM moter operating at rated power has a power factor of 0.75 lagging. the line voltage is 208 VAC @60 Hz and the line current is 27A. Assuming 83% is a reasonable efficiency for moters of this size
Expand the memory unit to a 32x4 RAM using two 7489ICs ( you might use the HM6116A120 chip for the Multisim Program Simualtion). Use the CS inputs to select between the two ICs. Note that since the data outputs are 3-stated
The NMOS transistors in the circuit shown in Figure P16.68 have parameters Kn =0.2mA/V2,VTN =0.5V,λ=0,andγ =0.(a)Forgatevoltagesof φ = 2.5 V, determine the quasi-steady-state output voltage for (i) vI = 0
At the instant shown, car A has a speed of 20km/h, which isbeing increased at a rate of 300km/h2 as the car entersan expressway. At the same instant, car B is decelerating at250 km/h2 while traveling forward at 100 km/h.
A zener regulator circuit has a load resistance that varies between 470 ohms and 2700 ohms. The circuit uses a 10V zener diode, Rs = 330 ohms, and the source voltage is 24V. The zener resistance is 10 ohms and the zener test current (Izm) is 28mA.
How many volts must be applied to a 3- ohm resistor to result in a power dissipation of 752W 3) A 0.27-k ohm resistor is rated 2W. Compute the maximum voltage that can be applied and the maximum current that it can carry without exceeding it..
Find the noise temperature for a Cal-Amp C-Band 140105-1 low noise block down converters (LNB) for satellite TV. What is their equivalent series input resistance, and what implications does this have for the circuit design
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