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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?
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A thermometer, initially at a temperature of 75 degrees Fahrenheit is suddenly immersed into a tank of water with a temperature of 180 degrees Fahrenheit. The time constant of the thermometer is 4 s.
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