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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.
A human factors psychologist studied three computer keyboard designs.
question random sampling from two normal populations produced the following resultsx1
Test the hypothesis that the average price is higher than $1.87. Use level of significance α = 0.05.
part-11.1 a random sample of n 50 males showed a mean average daily intake of dairy products equal to 756 grams with a
Test the hypothesis that whether or not an individual has hypertension is independent of how much that person smokes.
proper diameter of a rod is between 24 and 26mm control limits production process has a mean diameter of 25mm and a
Identify each of the following variables are qualitative or quantitative
However, 21% of the students neither go to all the lectures nor buys the recommended textbook. What is the probability that a randomly chosen student who buys the textbook attends every lecture?
Draw the graph relating Number of Faults to Line length and does the data indicate that the number of faults per mile has changed from year 2000 to year 2001?
the life times y in years of a certain brand of low-grade lightbulbs follow an exponential distribution with a mean of
A manufacturer wishes to estimate the proportion of washing machines leaving the factory that is defective. How large a sample should she check in order to be 93 percent confident that the true proportion is estimated to within 0.014?
Out of forty students, 14 are taking English Composition and 29 are taking Chemistry. If five students are in both classes, how many students are in neither class? How many are ineither class?
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