Find the steel area required for beam which has b = 10 in. and d = 17.5 in. to carry a factored load moment of 1,600 in-kips.

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) A lake with constant volume 10 x 106 m3 is fed by a pollution-free stream with flow rate 50 m3/s. A factory dumps 5 m3/s of a nonconservative waste with concentration 100 mg/L into the lake. The pollutant has a reaction rate coefficient K of 0.25/day. Assuming the pollutant is well mixed in...

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In order for BOD results to be valid, it is desirable to maintain a minimum dissolved oxygen concentration at the end of the incubation period of at least 1.0 mg/L. If an industrial wastewater is known to have a COD of 1000 mg/L, recommend a dilution factor for conducting a BOD5 test.

Determine the COD, carbonaceous BOD, and nitrogenous oxygen demand of a 100 mg/L solution of urea (N2H4CO)

A Biodegradable industrial wastewater (paper production) has a COD of 600 mg/L. If the BOD progression follows first-order kinetics with a rate constant = 0.10 per day, determine the BOD.

A biodegradable industrial wastewater (paper production) has a BOD(subscript 5) of 600 mg/L. If the BOD progression follows first-order kinetics with a rate constant = 0.10 per day, determine the BOD(subscript u)

Knowing a typical water retention curve for sand, fine sand, and a silt loam- Based on the behavior of these soils in terms of moisture content versus negative (suction) pore pressure , discuss briefly in a paragraph or two the advantages and disadvantages of these soils in the following...

How do I calculate the hydraulic conductivity of the five meter thick aquitard.