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1. A 400-V DC shunt motor has ?eld and armature resistances of respectively 100 and 0.1 Ω. If the motor absorbs 40 kW from the electric grid, calculate:
(a) the line, armature, and ?eld current(b) the electromotive force(c) the ef?ciency
2. The 400-V DC motor of the previous exercise is running at 1100 rpm and absorbing a line current of 80 A. Calculate the torque developed and the ef?ciency.
question in the poker game a hand is a set of 5 cards chosen randomly from a usual deck of 52 cards.a how many
a. Construct an estimate of the regression equation using the same variables. b. Produce the appropriate residual plots to determine if the linear function is the appropriate regression function for this data set.
Use the commutative and associative properties of multiplication and exponential notation to rewrite the product.
q1 use the normal approximation to the binomial to find the probability of x 20 when n 30 and p 0.5.q2 of
The average weight of adult men is 172 pounds with a standard deviation of 29 pounds. 30 men were asked their weight and the mean was calculated to be 181, test the hypothesis that the mean is not 172 pounds using alpha = .05.
imagine the following game of chance. there are four dollar bills on the table. your roll a fair die repeatedly. every
Test this problem at 99% confidence and provide conclusion. Would the problem have a similar conclusion if we knew the population standard deviation was $40,000? Why?
Find the confidence interval for the difference of the two means - Is there a significant difference in teacher's salaries between two states
Seeds. Information on a packet of seeds claims that the germination rate is 92%. What's the probability that more than 95% of the 160 seeds in the packet will germinate? Be sure to discuss your assumptions and check the conditions that support you..
listed below are actual high temperatures and high temperatures that were forcast one day earlier. construct a 95
for the following problems do the followinga draw thenbspscatter plotnbspfor the variables.b compute thenbspcorrelation
the boston public school district has had difficulty maintaining on-time bus service for its students a year later
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