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1.Uniform flow occurs in a rectangular channel 3.05 m (10.0 ft) wide and 1.52 m (5.0 ft) deep. Compute the mean shear stress on the channel perimeter if the channel slope is 0.001. Compute the velocity, discharge rate, and critical depth in the channel for a Manning roughness coefficient of 0.015.
2.Determine the required spacing of joists supporting 3/4in. thick plywood that is to support an 8 in. concrete floor slab, assuming a construction live load of 50 psf and a formwork dead load of 10 psf. Use plywood with f' b= 1930 psi.
The sand particles range in diameter from 0.04 to 2.0 mm with a specific gravity of 2.65. The wastewater discharge rate is 1400 m3 /d at 20°C. Design a settling tank to remove all the metal and sand particles.
The acceleration of a particle as it moves along a straight line isgiven by a = (2t-1)m/s2 where t is in seconds. If s =1mand v =2m/s when t =0 determine the particles velocity and positionwhen t = 6s. Also determine the total distance the particle t..
The mean grade on a final examination was 72, and the standard deviation was 9. The top 10% of the students are to receive A's. What is the minimum grade a student must get in order to receive an A ?
A gas is containied in a vertical frictionless piston cylinder device. the piston has a mass of 20kg with a cross-sectional area of 20cm^2 and is pulled with a force of 100n. if the atmospheric pressure is 100kpa determine the pressure inside.
One atmospheric air stream at 15 c and 30 percent relative humidity is mixednadiabatically with another air stream at 30c and 70 percent relative humidity in a steady flow process if the mass flow rate of the dry air in the hot stream
How much must he set aside in his savings to account for the 3-months summer to cover his rent for next year. The savings account earns 3% with monthly compounding.
Which software do we use to calculate force and moment, and draw shear and moment diagram? I really need this software to design my structural project. Please helps me... thank you so much.
The effluent contains 20 mg/L of solids and 20 mg/L of BOD the biological treatment process produced .32 kg of bacterial solids per kg of BOD removed
A rigid tank contains 40 lbm of air in 20 psia and 70 degrees F. More air is added to the tank untill the pressure and temperature rise to 35 psia and 90 degrees F, respectively.
A rectangular block of aluminum 30 mm × 60 mm × 90 mm is placed in a pressure chamber and subjected to a pressure of 100 MPa. If the modulus of elasticity is 70 GPa and Poisson’s ratio is 0.333, what will be the decrease in the longest side of the bl..
You purchase a house with a known radon problem. The house has a 1 m high dirt-floored crawl space. The emission rate of radon into the crawl space is reported to be 0.6 pCi/m2s.
A breif explination on clay mineralogy including isomorphous substitution, specific surface, cation exchange capacity and their effect on clay properties.
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