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a low broad crest weir is installed in a wide, rectangular channel to reduce the flow velocity. the channel is 60ft wide, the channel slope is 1 to 2000. Manning's roughness coefficient n=0.014. the discharge per unit channel width is q=60 cfs/ft. the depth directly upstream of the weir is 12ft. What are the critical depth and the normal depth at the given discharge? How far does the backwash extend upstream if the rise of 10% above normal depth is taken as the limit?
the turbopump unit in the engine nominally operates at 7000 rpm, and a result of design issue, the actual thrust provided by the engine oscillates harmonically with an amplitude of 10 KN at the same rotational frequency as the turbopump unit.
A 0.25 in diameter copper rod BC is securely attached between two identical 1 in diameter steel rods (AB and CD). Find the load P if the total elongation of the system is measured to be 0.0312 in. Esteel= 29,000ksi, Ecopper=17,000ksi.
A coal with 6% ash and a heating value of 13,000 Btu/lb is burned in a new power plant. Assume that 30% of the ask falls out as bottom ash in the furnace. Calculate the efficiency of ESP required to meet federal new source performance standards.
Write the mass balance equation for an ideal 1D plug-flow stream under steady state conditions with a first-order decaying substance. Solve for the concentration as a function of the concentration x=0, the rate constant kd, longitudinal distance x..
determine the power that must be supplied to the motor at this instant. The motor has an efficiency of 76 %. Neglect the mass of the pulleys and cables.
a cantilevered bean has a lenght of L, a cross section area of A, and a flecural rigidity of EI. The free end is free to rotate and displace due to bending. derive the stiffnes of the cantilevered bean. Assume small deformations.
The 20-lb cart B is supported on rollers of negligible size. If a 10-lb suitcase A is thrown horizontally on it at 10 ft/s, determine the length of time that A slides relative to B, and the final velocity of A and B. The coefficient of kinetic fri..
What are the effects of water pollution on the components of the hydrologic cycle?
Determine the actual field weight required to mix a 4 bag mix using the mix proportions given below. The excess moisture contet of the sand is 6% and that of the gravel is 2% Component Weight ..
A 30-liter volume of gas at 25 degrees C contains 12 g of methane (CH4), 1 g of nitrogen (N2), and 15 g of carbon dioxide (CO2). Calculate (a) the moles of each gas present, (b) the partial pressure exerted by each gas, and (c) the total pressure ..
What is the smallest particle size (density 2.65 g/cm3) that will be removed in a horizontal grit chamber 10 m long and 1.0 m deep if the flow rate is 1000 m3/hr. Assume the temperature of the water is 25°C.
A dye test reveals that the specific discharge between the two wells is about 2.75 m/day. if the wells are 45m apart, What type of aquifer material do you expect in this location
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