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A settling chamber is used to remove particles from an air flow. Settling chamber height is 3 m and residence time of air in the chamber is 10 s.
(a) What minimum particle-settling velocity is required, if all particles are to be removed?
(b) What is the minimum-size particle that the chamber would remove?
The particle density is 1 g cm-3, air viscosity is 1.69 X 10-4 g cm-1 s-1, and the air density is small enough that the buoyancy force may be ignored. Express your answer as particle diameter in ion.
determine the required diameter of the bar according to the maximum-distortion-energy theory. Use a factor of safety of 2 with respect to yielding.
A soil initially has a degree of saturation of 95% and a unit weight of 129 lb/ft3. It is then placed in an oven and dried. After removal from the oven, its unit weight is 109 lb/ft3. Compute the void ratio, porosity
Determine the height, h, the water level will rise in the tank before remaining constant. Also, if initially the tank is empty, what amount of time will it take for the water level to rise to h? Be sure to justify all assumptions made.
The two disks each have a mass of 25kg and are attached at their centers by an elastic cord that has a stiffness of k = 1.6kN/m . Determine the stretch of the cord when the system is in equilibrium
A 2 m high sandy fill material was placed loosely at a relative density of 47%. Laboratory studies indicated tht the maximum and minimum void ratios of the fill material are 0.92 and 0.53, respectively.
A hawser is wrapped two full times around a bollard. by exerting an 80 pound force on the free end of the hawser a dockworker can resist a force of 5000 on the other end of the hawser.
A car has the following characteristics: weight = 18000 N; cross-sectional area = 2.5 m^2, drag coefficient = 0.5; rolling friction coefficient = 0.02. The energy content of gasoline is 3.5E10^7 Joules/Liter.
A 125lb bowling ball is suspended from point C with rope CE. A second rope (ABC) is tied to point C and wraps around pulley B toward point A. Spring CD is used to hold the position shown. Determine the stretched length of CD if the spring coeffici..
Design a spherical tank, with a wall thickness of 2 cm that will ensure that no more than 50 kg of hydrogen will be lost per year. The tank, which will operate at 500°C, can be made of nickel, aluminum, copper, or iron. The diffusion coefficient o..
The specimen was 8 cm in diameter and had a length of 85 mm. The area of the standpipe was 0.45 cm^2. Compute the coefficient of permeability of the soil in cm/s, m/s, and ft/d. What was the probable classification of the soil tested
A nozzle is designed to linearly accelerate the fluid from V1 to V2 (i.e., V = ax +b, where a and b are constants). Determine the local acceleration, the convective acceleration, and the total acceleration at point 1 and 2 at t = 0.
Write the equations required to express the shear and moment along the entire length of beam. Use an origin at point A, and then repeat computations using an origin at point D. Plot the shear and moment across the beam.
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