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A review article on the CVD processes used to form SiC and Si3N4 by one of the pioneers in this area, Erich Fitzer [Fitzer, E., and D. Hegen, Chemical vapor deposition of silicon carbide and silicon nitride-Chemistry's contribution to modern silicon ceramics, Angew. Chem. Int. Ed. Engl., 18, 295 (1979)], describes the reaction kinetics of the gas-phase formation of these two technical ceramics in various reactor arrangements (hot wall, cold wall, and fluidized bed) for several precursor combinations, as indicated in the accompanying diagram.
(a) Determine the activation energy(ies) for each ceramic/reactor/precursor type.
(b) Comment on what causes the break in two of the curves at high temperatures.
Figure out the necessary sample size to reduce sampling error to plus or minus $500. Do you need to have an estimate of the current mean income to answer this question? why or why not?
Subjects would be randomized to receive either the new drug or placebo, then averages of CES-D scores will be compared using the two-sided two-sample t test at the 5% level. How large should the total sample size be if it is important to detect a ..
in a test of the effectiveness of garlic for lowering cholesterol 42 subjects were treated with garlic in a proceessed
Suppose that we want to evaluate the role of intravenous pulse cyclophosphamide (IVCP) infusion in the management of nephrotic syndrome in children with steroid resistance. Children were given a monthly infusion of IVCP in a dose of 500 to 750 mg/..
a contractor purchases a bulldozer for 36500. the bulldozer requires an average expenditure of 5.25 per hour for fuel
an instructor gives his class a set of 13 problems with the information that the next quiz will consist of a random
If he continues his session for a very long time, what is the most likely distance that he will finish with? Estimate the probability of finishing at that distance.
If the writing scores for the population have a standard deviation of σ = 20, does the sample provide enough evidence to conclude that the new composition course has a significant effect?
Critically discuss some concepts behind variance analysis? Why is it important to test for variances in your data? Explain. How is variance analysis used in health care administration?
someone is going to play roulette 270 times betting a dollar on a split each time. a split pays 17 to 1. find the
let x be the random variable for the number of times a fair dice is tossed before a six appears. find ex. i tried by
The data indicate a significant relationship between schizophrenia and the season of birth?
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