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One million gallons per day of water is pumped out of the ground and is sent down the mountain in a square 1A????1 A????1 1A????1 channel to a community. Chlorine is added at the beginning of the channel to react with and disinfect (get rid of) the 50 ppm microorganisms in the water. Assume a first order reaction with a k = 0.1 min -1 . At what distance is the concentration of microorganisms equal to 1 ppm?
A 280 KN.m couple is applied to a wooden beam, of rectangular cross section 38mm by 90mm ,in a plane forming an angle of 30 degree with the vertical, determine the maximum stress in the beam.
The 3.5-Mg engine is suspended from a spreader beam having a negligible mass and is hoisted by a crane which exerts a force of 40 kN on the hoisting cable. Determine the distance the engine is hoisted in 2.4 s, starting from rest.
A bowling ball is cast on the "alley" with a backspin of = 12 while its center has a forward velocity of = 7 Radius= 120 mm Determine the velocity of the contact point in contact with the alley.
A perfectly mixed aeration pond with no recycle (return line) serves as the biological reactor for a small community. The pond receives 30 cubic meters/day of influent with a BOD5 of 350 mg/L that must be reduced to 20 mg/L before discharge.
Weather records for a certain region indicate that there is a tendency for two hot summers to occur in a row. From the statistics for the region, the following information has been es tahlished
A block of 250mm length and 50x40mm cross section is tosupport a centric compressive load P. The material to be usedis a bronze for which E = 95GPa. knowing that the normal stress must notexceed 80 MPa and that the decrease in length of the block sho..
If we compare brass and bronze having 90% copper, brass (alloy with zinc) will have less yield strength than bronze (alloy with tin). Why?
Given the data below for two alternatives, find the better alternative, if MARR is 8%. alt A |alt B Initial cost $10,000 |$15,000 maintenance cost/ year $1,000 |$500
Can it be larger than the largest gas constant in the mixture?
Using EES (or other) software and the relations given in Table A-32, calculate the one dimensional isentropic compressible-flow functions by varying the upstream Mach number from 1 to 10 in increments of 0.5 for air with k= 1.4.
Explain what is all about hydrated cement
a railway wagon weighing 40 kn and moving with a speed of 8 kmh is stopped by a buffer of 4 springs whose allowable
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