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A 6ft wide, 10ft high vertical rectangular gate has its top edge 6ft below the water level. it is hinged along its lower edge. what force, acting on the top edge, is necessary to hold the gate shut
A falling-head permeability test is being conducted on a saturated sample of clayey silt having hydraulic conductivity of 6.5 x 10-9 m/s. The diameter and the length of the sample are 100 mm and 150
A vertical pipe of 4ft diameter and 60 ft long has a pressure head of 22.7 ft of water at its upper end. when the flow of water through it is such that the mean velocity is 16 fps, the pipe friction
It is proposed to estimate the seepage flow rate through the foundation soil using the flow net sketching technique. For this purpose, calculate the horizontal scale factor and effective hydraulic
The cross-sectional area of the sample was 60 cm2 and its length was 150 mm. For 80 cm3/min steady-state flow rate, a total head difference of 8 cm was measured across two points separated by 10 cm
A 25-W compact fluorescent lightbulb (CFL) produces the light equivalent of a 100-W incandescent bulb. The population of North America is estimated to be about 305 million.
A lagoon with volume 1200 m3 has been receiving a steady flow of a conservative waste at a rate of 100 m3/day for a long enough time to assume that steady-state conditions apply.
how to determine the substrate concentration and biomass concentration at 0.5 days. Use spreadsheet to solve for the concentrations with a delta t = 0.01 days
Determine the rate of ammonia (NH4-N) utilization and the biomass growth rate for the following conditions: µm = 0.50 g VSS/g VSS-d Ks = 0.50 mg/L X = 10 mg/L S = 40 mg NH4-N/L
Suppose an air pollutant with rate constant k= 0.20/hr is emitted into the box at a total rate of 10.0 kg/s. Find the steady-state concentration if the air is assumed to be completely mixed.
To maintain a pressure of 300kPa at point 2, what the 15 C water is flowing at 0.5 L/s, what pressure must be provided at point 1 if you neglect friction
A pressure gage at elevation 4.8 m on the side of a storage tank containing oil reads 34.7 kPa.Another gage at elevation 2.2 m reads 57.5 kPa. Compute the specific weight, density, and specific grav
Part of a vertical piping system consists of 8 ft of 4 in diameter, connected to 8 ft of 3 in diameter above, and connected to 8 ft of 2 in diameter above that. Water at 60 F flows up the pipe (no d
A bug is crawling up the leg of a man on a train. The velocity of the bug relative to the man is 0.3 m/s k . The mas is waling from one side of a carriage to the other with a vlocity relative to the t
A random sample of 50 suspension helmets used by motorcycle riders and automobile race- car drivers was subjected to an impact test, and on 18 of these helmets some damage was observed.
determine the temperature of propane when the pressure in the tank drops to 1 atm. Also determine the total amount of heat transfer from the environment to the tank to vaporize the entire propane in
If the densities of metals A and B are 4.27 and 6.35 g/cm3, respectively, whereas their respective atomic weights are 61.4 and 125.7 g/mol, determine whether the crystal structure for this alloy is
A small nitrogen container is at Pressure P1 = 5 bar and T1 = 300 K. It's been filled from a larger nitrogen container, which is P= 10 bar and T = 300 K.
For a drainage area of 5,187mil^2 mean annual runoff is determined to be 3,708ft^3/s and the annual averge rainfall is 35.5 inches. Estimate the annual ET losses in inches for the area.
A sound wave is observed to travel through a liquid with a speed of 1500 m/s. The specific gravity of the liquid is 1.5. Determine the bulk modulus of elasticity, Ev, for this fluid.
a municipal landfill has available space of 16.2 ha at an average depth of 10 m.seven hundred sixty-five (765)m^3 of solid waste is dumped at the site 5 days a week.
Nitrate concentrations are often recorded in units of NO3--N/L to be compared with other nitrogen constituents. Near three rural wells nitrate concentrations were reported as 0.25 mg
Name the three factors that influence the degree to which martensite is formed throughout the cross section of a steel specimen. For each, tell how the extent of martensite formation may be increase
Determine the magnitude of P if 10sec is required for the package to travel 5 m up the incline. The static and kinetic coefficients of friction between the package and the incline are both equal to
The level of one reservoir is 500 ft above the level of the other, and water is flowing steadily through the pipe from one reservoir to the other.