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The collar A is free to slide along the smooth shaft B mounted in the frame. The plane of the frame is vertical. Determine the horizontal acceleration α of the frame necessary to maintain the collar in a fixed position on the shaft.
A waster water treatment operator runs a sludge volumeindex test in a liter cylinder and finds at the end of 30 minutessettling, the solids occupy 200mL. He knows the suspendedsolids concentration in his aeration tank from which he got thesample is 4..
Modeling the skydiver as a particle and assuming that the skydiver follows a perfectly vertical trajectory, determine the average force exerted by the parachute from the moment of deployment until landing.
A water jet of diameter 2 inches and speed of v=60 ft/s is filling a tank at a 70 degree angle. The tank has a mass of 25 lbm and contains 6 gallons of water. The water temperature is 70 degrees F.
a sewage treatment works stw with 4 single-stage trickling filters has become organically overloaded due to the
mg/L of salt. The new owners propose to flush the pond into their discharge pipe leading to the Atlantic Ocean, which has a salt concentration above 30,000 mg/L.
The cost of extending a certain road is $850,000. Resurfacing and other maintenance are expected to cost $175,000 every 3 years and lasts for 96 years. What is the present worth of the road at an interest rate of 6% per year (over that period)?
It is commonly known that there are 16 ounces in 1 lb. Consider a 0.5lbf glass that weighs 1 lbf when filled with 8 ounces of liquid. Determine the liquid density in British gravitational units and in SI units. Also calculate the specific weight in b..
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.
how to find degree of kinematic indeterminacy
Determine the Mach number at the duct exit and the drop in stagnation pressure P01 - P02 during this process.
a dense sand has an effective friction angle of 43 and c0. a dry 2.8-inch diameter sample is tested in drained triaxial
An emission control system for a new car costs $750 and reduces NOx emissions from 0.4 g/mile to 0.18 g/mile. Assume the car is driven 10000 miles per year, and the life of the emissions control system is 11 years with zero scrap value.
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