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A transformer is rated at 629 VA and has a primary voltage of 435 V and a secondary voltage of 133 V. Its rated copper losses are 46 W and the iron losses are 20 W. Calculate the load factor (in %) that would result in maximum operating efficiency at unity power factor.
the equations s=5000+200x and d= 95---100x express the supply s and the demand d, respectively. the equillibrium is s=d. what is the equillibrium price?
Determine the boundary values of the 95 percent confidence band for the regression line when Xh = 28. Is your-confidence band wider at this point than the confidence interval in part (a)? Should it be?
people were polled on how many books they read the previous year. how many subjects are needed to estimate the number
A stone is thrown into a lake, and t seconds after the splash the diameter of the circle of ripples is t meters. Express the circumference C of this circle as a function of t.
Use the Poisson model to approximate the probability. Round your answer to four decimal places.
Consider the path r(t)=(6t,3t2,3lnt) defined for t>0. Find the length of the curve between the points (6,3,0) and (12,12,3ln(2)).
Formulate this staffing problem using LP. Solve the problem. How many trainees must begin each month? Submit the problem in Excel Solver.
For one performance, 30 advance tickets and 15 same-day tickets were sold. The total amount paid for the tickets was 1275 . What was the price of each kind of ticket?
A fire detection sensor is tested for its failure rate and found to have a mean failure rate of 3.6E-2 per hour of exposure with a standard deviation of
A body of mass 8 kg moves in a (counterclockwise) circular path of radius 8 meters, making one revolution every 12 seconds. You may assume the circle is in the xy-plane, and so you may ignore the third component.
Two trains of equal length are running on parallel lines in the same direction at 46 km/hr and 36 km/hr. If the faster train passes the slower train in 36 seconds,what is the length of each train?
Find the decay constant k. What is the half life of the substance?
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