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From the figures for the pho non dispersion curves for Si and GaAs pl us the equations for optic and acoustic phonons, explain why the energy for the Si curves is h igher in energy than the curves for GaAs? Assume that the elastic constant is about the same for both materials. Also, why do the optical and acoustic phonon branches cross at the zone boundary for Si but not for GaAs?
construct a 96 confidence interval for the true mean breaking strength of a certain type of 10 ft. long cables. assume
She wants to choose the passing grade such that the probability of passing a student who guesses on every question is less than 1/10. What score should she set as the lowest passing grade?
you are collecting data asking participants about their religious background. choices include christian jewish muslim
Approval rating. A newspaper reports that the governor's approval rating stands at 65%. The article adds that the poll is based on a random sample of 972 adults and has a margin of error of 2.5%. What level of confidence did the pollsters use?
two numbers x and y are chosen at random from the interval 0 1. what is the density function of maxxy
Find the mean and standard deviation of X, the number of students in class, who will develop influenza.
nj state partol would like to know if the mean speed that drivers drive in i-80 is faster than i-280. they gather
The insurance company charges an annual rate of $250 for the collision coverage. What is the expected value of the collision policy holder?
1. a state group is interested in whether voters would support lowering the legal drinking age to 18. a simple random
Construct a 99% confidence interval estimate of the population proportion of accounts that would purchase the additional line if the handset were free.
How many patients are represented in these data?____
If represents the true average gas mileage for this new model, which of the following gives the null and alternative hypothesis that the CONSUMER group should test?
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