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1. In a certain crystalline material the vacancy concentration at 25*C is one-fourth that at 80*C. At what temperature would the vacancy concentration be 3 times that at 80*C?
2. Suppose one attempts to add a small amount of Ni to Cu in an effort to create a solid solution.
a.) Which element is the solvent and which is the solute?
b.) Do you think the resulting solid solution (S.S.) will be a substitutional S.S. or an interstitial S.S. Why?
c.) Do you think Ni and Cu will be completely soluble in each other? Why or why not?
3. What type of solid solution is likely to be formed when C is added to Fe?
Find all values of alpha such that the system is stable for K = 2. If the unity feedback closes around this G(s) and an input is a unit step r(t) = 1u(t), what is the stead-state error, e_ss, as a function of alpha and K?
Write an assembly language program to turn the stepper motor. Start a new project. Set bits 1 to 4 of PORT P ($25A) to 1 (output direction) Do not set bits 0, and 5-7, setting these bits may produce unexpected results.
A natural gas power plant has a condenser that extracts 18,000 Btu/kg of natural gas. Compute the mechanical energy of the turbine and the overall system efficiency.
a) Design an op amp circuit that will create an output voltage y(t) that is the solution to the differential equation y''(t) = 25 y, subject to the two initial conditions y(0) = 0.2 and dy(0)/dt = 0. You will need to use integrating op amps for t..
Consider a series RL circuit with a voltage source. Take the output as the voltage across the resistor with L = 2 henrys and R = 4 ohms. (a) Find the zero input response as a function of time. The initial current is 2 A.
Find the density for germanium (Ge) semiconductor atoms give that its lattice constant a-5.66Å (Angstrom) and atomic weight is 72.59 g/mole.
A panasonic model Rx-ft560 stero uses a 12V_dc powwer supply. At full volume ( max triple min-bass) A max current of 1.4 amps is needed from the power supply. at min volume, this drops to 200mA. (hint: calculate the range of R_L)
The 300-kg block is acted upon by a force P, pulling it as shown. P makes an angle of 36o with the horizontal. If the coefficient of sliding friction between the block and the floor is 0.35, determine the force required to start moving the block.
a 10 ohm resistor is connected across a 12 v battery. How much current is there through the resistor?
For a transfer function with a pair of complex zeros located on the j (omega)-axis, what happens to the frequency response as the frequency applied to the system approaches the value at which the zeros are located
Calculate the percentage second harmonic distortion present in the output. Calculate the percentage error in the output voltage compared to its ideal value at the instant of time when t= 1/3200 seconds.
When the scope probe is properly calibrated, it can be modeled as a 9[M Ohm] resistor in parallel with a capacitor having a capacitance l/9th that of the oscilloscope input capacitance.
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