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A river above a town has a flow of 200 L/s and a BOD5 of 1 mg/L. The river is the receiving water for 25 L/s of treated sewage (BOD5= 25 mg/L) from the town and 25 L/s of untreated effluent (BOD5=175 mg/L) from a pulp and paper mill just downstream from the town. If the BOD5 of the river below the mill outfall must not exceed 5 mg/L, what percent removal of organic matter (BOD5) is required by the mill to meet this requirement?
a mass of 2kilogram is projected with a speed of 3m/s.if a plane inclined 20 degrees with the horizontal.after travelling travelling 0.8meters, the mass comes to rest. determine the coefficient of friction and also the speed as the black returns t..
Draw the shear diagram for the shaft. The bearings at and exert only vertical reactions on the shaft
A photograph is taken of a transverse wave travelling along a length of rope. At this instant the shape of the wave is described by y = (2 m) sin ((0.8 rad.m-1)x+0.8 rad). The speed of the wave is 2 m/s. Calculate the distance between two successi..
A fisherperson, pulling on the anchor cord, causes a force on the man of F=(40i+20j-50k)N. If the cord is 30m long,determine the Cartesian coordinates of the anchor at A. Assume that cord OA is a straight line.
Three days later, Abu sees his solicitors and executed the transfer of his said bungalow to Abdul Samad at the said value. Two month later, Abdul Samad expelled Abu from the religious group. Abu now wants to set aside the sale of his bungalow.
If they plan to increase their savings by 5% each year, how much must they invest in the first year given that they expect to earn 4% per year on their investment?
What type of exercise takes place in a classroom setting arranged to look like an emergency operations center or in an actual emergency operations center, and involves simulation using written, telephone, and radio messaging.
In using the Darcy-Weisbach equation for flow in a pressure conduit, what percentage error is introduced in Q when f is misjudged by 20 percent?
Compute the maximum acceptable service load on an A36 steel plate tension member 1/4in.x12in. having a single line of holes parallel to the direction of loading. The load is 25% dead load and 75% live load, and 7/8in. diameter bolts are used.
Due to a crash at a railroad crossing, an overpass is to be constructed on an existing level highway. the existing highway has a design speed of 50 mi/h.
A dense sand has an effective friction angle of 43 and c'=0. A dry, 2.8-inch diameter sample is tested in drained triaxial shear with a confining pressure of 2500 psf. What axial load, P (in pounds), will be required to fail the sample?
If the elevation difference between the water surfaces is y = 25 + x/11 metres, what minimum pipeline diameter will be required to convey the design discharge? Once your design is complete, determine the actual discharge. The value of x equals 23.
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