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A 20 cubic meter tank contains ultimate BOD at a concentration of 550 mg/L. If the BOD reaction rate constant is -0.42/day, what is the concentration of BOD remaining after 3.0 days?
For satisfactory operation, the static pressure at the pump inlet must not be lower than -6 m of water gage. Determine the smallest standard commercial pipe that will give the required performance.
The two shafts in a speed-reducer unit are subjected to couples of magnitude M1 = 18 N · m and M2 = 7.5 N · m, respectively. Replace the two couples with a single equivalent couple, specifying its magnitude and the direction of its axis.
At the end of the first 5 years, the company upgraded the analyzer at a cost of $10,000. Following the upgrade the lab purchased another 5 year maintanence contract for $1000 a year, payable at the end of each year.
a belt sander is being brought up to operating speed at the instant of the belt is rotating in the clockwise direction ar 4 ft/s and acceleration at 40 ft/s. the tensioning cylinders A and B have a radius of 2.5 in.
At point D, Fred measured the distance to point E, the final point, to be 405.27 ft. The noon whistle sounded (you may have to have a little "small town" in you to appreciate the noon whistle), so they left in a hurry without measuring the angle C..
Over the past 3 years, there have been 14, 13, and 15 crashes on this section of College Street. The two-way ADT on this section is 16,474 vehicles per day. What is the annual crash rate for this section of College Street
The four approach volumes per day at this intersection are 28,648, 23,856, 12,150, and 10,174. The crash totals for the last 3 years are 91, 96, and 87. What is the annual crash rate for this intersection
Find out the number of turns in each spring, if the diameter of the spring wire 14 mm and the diameter of coil is 80 mm. Assume C=84 GN/mmxmm.
What are the velocities of both just before impact and just after impact. There is a distance of 5m between the vehicles prior to the winch being turned on.
Using the Gumbel probability function, estimate the probability that a maximum 24 hour depth in any year will exceed 160 mm. What is the probability that the maximum 24 hour depth will exceed 125 mm
If r = (theta)2 and theta = 2t, find the magnitude of r dot and theta double dot when t = 2 s
Locate the image using both the spherical mirror equation and a ray diagram and identify if it is real or virtual, upright or inverted, and smaller or larger.
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