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The uniform 25 kg plate is welded to the vertical shaft, which is supported by bearings A and B. Calculate the magnitude of the force supported by bearing B during application of the (M =) 140 N·m couple to the shaft. The cable from C to D prevents the plate and shaft from turning, and the weight of the assembly is carried entirely by bearing A.
A fine-bubble aeration basin has a flow of 21.5 mgd, an influent BOD of 180 mg/l, 31 mg/l of mmonia, and effluent of 10 mg/l. During the winter, the wastewater temperature of 14.8 degrees C does not nitrify.
You have a beaker filled with coarse sand. The capacity of the beaker is 100cm^3. Next, you add to the beaker 40cm^3 of distilled water, filling the water level exactly to the top of the sand.
Conduct either a qualitative or quantitative risk assessment on this project. Identify the risk factors that you consider most important for the suspension bridge construction. How would you assess the riskiness of the project? Why?
North City must choose between two new snow-removal machines. The SuperBlower has a $70,000 first cost, a 20 year life, and an $8000 salvage value. At the end of 9 years , it will need a major overhaul costing $19,000.
Air pollution in a city is caused by the following four sources: vehicle exhaust (V), industrial exhaust (I), dust (D), and pollen from plants and trees (T). On a particular day, the likelihood of air pollution caused by these sources is 4:3:2:1, ..
An undistured soil sample has a dry unit wieght of 112 pcf with specific gravity of solids equal to 2.68. a. What is the void ratio of the sample b. What is the porosity of the sample
Calculate the numbers of married men, single men, married women and single women. Print these numbers on a student summary report. If any single men are over 30 years of age, print their names and ages on a separate eligible bachelors report.
The discharge through a 6.0 ft wide rectangular channel is 200.0 ft3/s. Find the conjugate depths of the jump formed in such a channel if 3.5 ft of energy head is lost through it.
Determine the horizontal reaction that is developed on the gate at C.
A short 60mm diameter circle bar is made of material for which the maximum safe compressive strees is 80 MPa and the maximum safe shearing strees is 30 MPa.
Assuming that the average stack gas velocity is 10.0m/s and the stack is circular with a 3.0 meter diameter, calculate the mass emissions rate of NO2 in kg/day.
Estimate the power needed to overcome the aerodynamic drag of a person who runs at a rate of 100 yds in 10 s in still air. repeat the calculations if the race is run into a 20-mph headwind: a 20-mph tail wind.
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