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On May 31, 2011, a barge carrying 2,400 metric tons of brown sugar sank in Thailand's Chao Phraya River.
(a) If 90% of the weight of this brown sugar is sucrose (C12H22O11), what mass of dissolved oxygen would have been required to degrade this mass of sucrose had some not been recovered from the barge prior to its dissolution and dispersion into the river?
(b) What would you expect the implications of such an event to be on aquatic life downstream?
A ferric chloride dosage of 40 mg/l and an equivalent dosage of lime are used to coagulate a water.
The copper pipe has an outer diameter of 2.50 in. and an inner diameter of 2.30 in. if the allowable shear stress in the pipe is 2 ksi, what portion of the tube needs to be reinforced
An automobile that you are looking at purchasing has an advertised fuel mileage of 30 miles per gallon. You rent the car for a week and track your mileage to school and back home and get (miles/gallon):
what is the reason for the relatively high strength of wood in the longitudinal direction of the tree trunk as compared to the transverse direction
The acceleration of a particle along a straight line is defined by a=(2t-9)m/s^2, where t is in seconds.At t=0, s=1m, and v=10 m/s. When t=9s, determine the particles position, the total distance traveled, and the velocity.
A 10 storey building measures 20m x 40m in plan and has columnslocated on a grid 10m x 10m. The floor consists of a 250mm thick R/C slab with droppanels 3m x 3m x 200mm thick in the vicinity of each column. Live load allowanceis 3.0kPa.
A first order reaction occurs in a PFR at the rate of 2.1 hr^-1. The reactor volume is 1400L and flow is 15 gpm. If the influent concentration is 200 mg/L, then what is the effluent concentration?
Axis of the hole is perpendicular to VP. Draw elevation, plan and development of the lateral surfaces of the pyramid.
The wedge is used to level the member. Determine thehorizontal force P that must be applied to move the wedge to theright. The coefficient of static friction between the wedgeand the two surfaces of contact is
What is the settling velocity of a .5 micrometer silica sphere at 20 degrees Celsius and an ambient pressure of 150 kPa. The density of silica is 2600 kg/cubic meter.
determine a) the x, y,z components of that force b) values of angle thetax, thetay, theta z defining the direction of the recoil force. (assume that the x, y, and z axes are directed respectively east, up, and south)
A small chunk of the original sample had a wet weight of 140.9 grams and weighed 85.2 grams after drying. Compute the water content, using the correct number of significant figures.
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