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Nitrogen dioxide (NO2) concentrations are measured in an air-quality study and decrease from 5 ppm to 2 ppm in 4 min with a particular light intensity.
(a) What is the first-order rate constant for this reaction?
(b) What is the half-life of NO2 during this study?
(c) What would the rate constant need to be changed to in order to decrease the time required to lower the NO2 concentration from 5 ppm to 2 ppm in 1.5 min?
A fully penetrating well of 30 cm diameter in an unconfined aquifer of saturated thickness 50 m was found to give the following draw down - discharge relationship under equillibium condition.
A “Cold Air-Standard Brayton cycle” gas-turbine power plant delivers a net power output of 60 MW to an electric generator. The compressor intake temperature is 300 K and the maximum temperature in the cycle is 1200 K.
A sealed insulated room contains 90 m^3 air at 12 C and 100 kPa. A container with 45 kg of water at 95 C is placed in the room. After heat transfer between the air and water, thermal equilibrium is reached.
He values the use of the pesticides at $10,000 and the neighborhood values clean air at $15,000. What does the Coase theorem suggest will take place?
Determine the rate of ammonia (NH4-N) utilization and the biomass growth rate for the following conditions:
Draw or sketch an isometric view depicting general brick veneer wall construction, brick garage wall construction with attached piers (single skin) and timber framed/timber clad wall construction.
The state of stress acting at a critical point on the seat frame of an automobile during a crash is shown in the figure. Determine the smallest yield stress for a steel that can be selected for the member, based on the maximum-shear-stress theory.
The three hinged arch is composed of segments of a circle. Support points A and D are not at the same level.Determine: (a) the horizontal and vertical components of reaction at A and D.
Find the period of the alternating vortices shed from a boulder in a river under the following conditions: diameter of cylindrically-shaped boulder is 1 m; approach velocity is 1 m/s; water temperature is 15.6 C.
A company has been discharging its waste into a holding pit for a long time. For the last several years, the pit has been full and overflowing into a local river. The waste concentration has been nearly constant at 10 mg/L of the pollutant of inte..
Calculate the X, Y and Z coordinates of point B for radial readings taken to B from occupied station A, if the backsight azimuth at A is 25°32'48", the elevation of A = 610.098 m, and hi = 1.45 m
Your project calls for construction of a 6 story building that is 75' x 150'. The building will be constructed with multi story cast in place construction using 2 sets of shores and one set of reshores. For each of the above, calculate the load and..
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