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Nitrogen in a wastewater treatment plant is in the form of ammonia and ammonium ion and has a total concentration of 7.1 x 10-4M (KH for NH3 is 57 M/atm; pKa of NH4+is 9.26). a. Find the fraction of the nitrogen that is in the ammonia (NH3) form (and hence strippable) as a function of pH. Include a table AND a graph. b. If the wastewater pH is raised to 10 and the atmospheric ammonia partial pressure is 5.0 x 10-10 atm, what would be the
In long-run equilibrium, most firms (the ones that remain from the original 298) will earn the normal % rate of return.
It's nighttime, and you've dropped your goggles into a swimming pool that is 3.0m deep. If you hold a laser pointer 1.2m above the edge of the pool, How far are the goggles from the edge of the pool
Suppose the gas above the soda in a bottle of a soft drink is pure CO2 at a pressure of 2 atm. a. Estimate the pH of the soda. b. Calculate CT, the total dissolved inorganic carbon.
Calculate the change in pH of rainwater resulting from an increase in the PCO2 from 10-3.5 atm to 10-3.0 atm due to fossil fuel emissions.
A listener increases his distance from a sound source by a factor of 3.03. what is the change in the sound intensity level in dB
An aluminum wire having a cross-sectional area equal to 3.20X10^-6 m^2 carries a current of 6.50 A. Find the drift speed of the electrons in the wire
Determine the required size of new Schedule 40 steel pipe to carry 0.5 cfs (Q = 0.5 cfs) of water at 160o F with a maximum pressure drop of 10 psi per 1,000 ft.
Critically analyse the theory, concepts and models of operations and information management; Demonstrate an understanding of the importance of information management in international operations;
Frank Gunter owns an apple orchard. He employs 40 apple pickers and pays them $7 per hour to pick apples, which he sells for $3.50 per box. If Frank is maximizing profits
design a concrete (n = 0.013) channel that will convey 50,000 GPM. It is to be a trapezoidal in cross section with a bottom width of 7.5 feet. The side slopes are to be 1.33:1 (H:V) and it is desired to have the depth of flow constant at 2.0 feet.
a storage tank has a diameter of 80 ft, a height of 25ft and contains oil to a height of 15ft. the suction pumps, which can handle 15000bbl/d, are started, but the safety valves are clogged and a vacuum is drawn in the tank.
calculate the numbers of married men, single men, married women and single women. Print these numbers on a student summary report. If any single men are over 30 years of age, print their names and ages on a separate eligible bachelors report.
How much differential settlement is causing the additional stress of 4,000 psi in girder that is rigudly attached to columns at either end of its 50-ft span. The moment of inertia of the beam is 15,000 in4, and it is a 24-in.-deep beam section.
Calculate the resistance coefficient K for a ball-type check valve placed in a 2-in schedule 40 steel pipe carrying 650 gal/min of oil (sg = 0.90)
The truss is to be constructed of members with equal cross-sectional areas and using a material with yield stress 700 MPa. The structure must be designed to support a mass (m) of 3400 kg with a factor of safety of 3.
Derive the expressions for the concentration exiting a CSTR and a PFR for a zero order removal reaction. Which reactor design is more efficient in terms of volume and hydraulic retention times
A river flows towards a lake with a velocity of 3 m/s and rate of 500 m3/s at a location of 90 m above the lake surface. Determine the total power generation potential of the river at that location.
A steady fire with an energy release rate of 500 kW occurs in a room 3m wide, 3m long, and 2.4 m high, with a door opening which is 1.8 m high and 0.6m wide. the ambient temperature is 20 degree celcius.
time(in months) after a computer of brand is sold and needed repair is normally distributed with mean 36 months and standard deviation 4 month. if 1% of the super computer need services less than k months after they are sold, find the value of k.
A steel bar of length 30 inches and circular cross section whose diameter varies linearly from 0.50 inches at one end to 0.75 inches at the other is subjected to an axial tensile force of 4.5 kip. Find the change in length of the bar.
Find the time for one complete cycle of this motion if the spring constant is 21 N/m. (Assume that once the pendulum ball hits the spring there is no effect due to the vertical movement of the ball.)
Refrigerant R134a enters the compressor of a refrigerator at 0.14 MPa and -10°C at a rate of 0.12 kg/s and leaves it at 0.7 MPa and 50°C. The refrigerant is cooled in the condenser to 24°C and .065 MPa and it is throttled to 0.15 MPa.
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