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A lubrication system in a coal mining dragline, pumps 140 mL/s of oil with a density of 810 kg/m3 and viscosity of 0.01 kg/m.s, across the full height and length of the machine. Downstream of the storage tank and 5 m above the ground, at a point T in the three millimetre diameter pipeline, the pressure is 1.55 kPa. The lubricant flows downstream to the head of the boom at a point H, 36.5 m above the ground, where it passes through a gallery with a diameter of 0.02 metres. The total flow then moves to a point W on the traction drive two metres off the ground, and travels through a nine millimetre diameter conduit. Ignoring all friction and minor losses, determine the pressures at points H and W.
Wastewater is discharged into an aquifer. This wastewater contains 0.1 ppm atrazine (a common herbicide). The MCL of atrazine is 5 ppb, the density is 1.19 g/mL and the solubility is 50 ppm. 500 ft away from the plant effluent there is a permeable..
Samples of 20 rivets for a steel structure are checked for quality every hour. The probability of finding a bad rivet that has to be scrapped is 1%.assume that x is the number of parts in the sample of 20 that have to be scrapped.
Determine: a) the height of the water, with respect to the base of each standpipe, and b) the effective stress at the depth of each standpipe, at the following times:
An approach to a pretimed signal with a 60 sec cycle has nine vehicles in the queue at the beginning of the effective green. Four of the nine vehicles in the queue are left over from the previous cycle.
Set up life cycle diagram for both alternatives and calculate net present value (NPT) and annual cost for the life time.
A soil specimen has a water content of 18% and a wet unit weight of 118.5 lb/cu. ft. The specific gravity of solids is found to be 2.72. Find the:
Determine the value of Po, as a funciton of H, for these two investment alternatives to be equivalent at an interest rate of i=15% per year.
Ernst & young is currently providing support to various sectors. In this regards it was felt that if this report is able to document good practices currently being adopted or planned in ceramic sector.
The section of the plywood in the 3rd quadrant is sawed off and the resulting piece is then glued squarely over the 4th quadrant portion of the plywood with glue of negligible weight.What are the x- and y-coordinates of the resulting center of gra..
If the time required to pay for parking is exponentially distributed with a mean of 15 seconds, find the average time in system.
determine the angular acceleration of the spool and the acceleration of the trailer. The wheels have negligible mass and are free to rotate.
Suppose that the distance from the lake outlet to the withdrawal cannot be more than 20 mi. What should be the new volume of the lake?
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