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A reaction in a batch system is assumed to be first order. Data listed below was collected. Determine the reaction rate constant.
chemical concentration (ug/L) time(min)
19.3 6
26.0 9
32.6 12
36.0 14
41.3 18
45.0 22
46.5 24
47.4 26
50.4 30
58.3 infinite
Given simply supported beam with an overhang. The beam is 12 inches wide by 24 inches deep, and the slab is 6 inches deep. use a roof live load of 20 psf, and a concrete density of 150 pdf. the beams are spaced 15 feet apart.
For the fully developed flow of water in a smooth 0.15-m pipe at a rate of 0:006m3/s, determine the thickness of a. the laminar sublayer; b. the buffer layer; c. the turbulent core.
The canal shown below is to be widened so that it can carry twice the amount of water. Determine the additional width L required if all other parameters (i.e. flow depth, bottom slope, surface material, side slope) are to remain the same.
Given that uniform flow is subcrital and there is a weir in a rectangular channel, how do you determine what the weir height should be to force the flow to be critical. Draw this transition on a specific energy curve.
Calculate the mass of the green house gas and ozone depleting substance CFC-11 (chemical Formula = CCl3F) in the atmosphere. Use units of GtC (giga tonnes carbon). Production of this substance is now banned and mixing ratios are slowly decreasing wit..
What is the pressure drop for water at 60 degrees F flowing through 12in schedule 40 pipe at a rate of 500gal/min over a distance of 100 feet.
Determine if the bridge would fail under a given load. The truck has two axles and the graph should should begin with 1 axle 7 ft into bridge with the other just reaching the bridge.
The owner wish to achieve an initial acceleration from rest of 15 ft/s^2 on a level paved surface. What is the maximum coefficient of road adhesion needed to achieve this acceleration
A 900-mm strip of steel is bent into a full circle by two couples applied. Determine (a) the maximum thickness t of the strip if the allowable stress of the steel is 420 MPa, (b) the corresponding moment M of the couples.
a transmission tower is held my three guy wires attached to a pin at A and anchored by bolts b c and d if the tension in wire ab is 3.6 kn determine the vertical force p exerted by the tower on the pin at A
Account for chemical reactions, groundwater flows, streams, precipitation, evapotranspiration. Indicate any assumptions that can be made to simplify your equation.
Calculate the uniform flow rate in an earth-lined (n = 0.020) trapezoidal canal having bottom width 3 m, sides sloping 1V : 2H, laid on a slope of 0.0001, and having depth of 1.8 m.
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