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The force F = 90i + 60j + 20k acts at the point (0,0,40). Compute the moment of the force about a line through the origin that has direction cosines (1/sqrt(3), 1/sqrt(3), 1/sqrt(3), 1/sqrt(3)).
A rectangular concrete channel is 3 m wide and 2 m high. The water 20 deg Celsius in the main channel is 1.5 m deep and is flowing at a rate of 30 m^3/s. determine the flow area, wetted perimeter, and hydraulic radius. Is the flow laminar or turbu..
The dissolved oxygen of sample water is 1.5 mg/L. At 25 C, the dissolved oxygen of the dilution water is 8.25 mg/L. You are told the BOD5 of the sample is 130 mg/L. You have a target final dissolved oxygen of 3.0 mg/L (give yourself some leeway).
Determine the value of Po, as a funciton of H, for these two investment alternatives to be equivalent at an interest rate of i=15% per year.
At point 2, the velocity and pressure are 14 ft/s and 23 psi. Determine at which of these two points the elevation is higher. Calculate the height difference. (Assume the sp ecific gravity of butane is 0.6 and that the butane is at a temperature o..
Determine the unstretched length of spring AC if a force P = 110 lb causes the angle theta = 60^circ for equilibrium. Cord AB is 2 {rm ft} long. Take k = 50;{rm lb/ft}
The outer surface of the tank is cooled by air at 300 K with a heat transfer coefficient of 100 W/m2K. Determine the maximum temperature in the tank. Take the thermal conductivity of the wastes as 2.0 W/mK.
A stockpile of gravel that has a water content of 6% is rained on so that its water content increases to 9%. Compute the difference in the weights of dry gravel in a 10 ton truckload taken from the pile before and after the rain.
Water in a household plumbing system originates at the neighborhood water main where the pressure is 480kPa, the velocity is 5m/s, and the elevation is 2.44 m. A 19 mm (3/4-in) copper service line supplies water to a two-story residence
A 2 foot tall multi-stage weir placed in a channel to cause the water to flow over the contracted weir at a height of 0.75 feet. There are 2 contractions and the original length is 6 feet. What is the discharge, in cubic feet per second
design a horizontal curve for a two lane road. The road has 12 ft. lanes. Due to expensive excavation, it was determined that a maximum of 34 ft. can be cleared from the roads centerline towards the inside lane to provide for stopping sight distan..
However, design codes which deal with shear friction design place an upper limit on the magnitude of the shear force for which the plane can be designed. Explain why this is so.
Draw a P-V diagram for pure component and label appropriate points such as superheated region, isothermal line, etc.
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