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For each of the cases below, assuming all other things unchanged, describe the effect of the following parameter variations on the magnitude of the maximum oxygen deficit in a river. Answer: Increase (+), decrease (-), or remain the same (=).
At a section in a beam the tensile stress due to bending is 70 N/mm2 and there is a shear stress of 25 N/mm2. Determine from first principles, the magnitude and direction of the principal stresses
The interaction that occurs between a system and its surroundings as the system executes a process, which is the result of the system being at a temperature different from that of the surroundings.
A .2kg mass of argon gas fills a .05m^3 piston-cylinder volume at a pressure of 400 kPa absolute. The piston induced pressure is changed until the volume expands to twice its original value, while the temperature remains constant.
a paved parking lot section has a uniform slope over a length of 100 m in the flow direction from the point of a
An investor has invested $250,000 in a new rental property. Her estimated annual costas are $6,000 and annual revenues are $20,000. What rate of return per year will the investor make over a 30-year period ignoring
At Point A, in a pipeline carrying water (γ=62.4 lb/ft^3) the diameter is 4.0 ft, the pressure is 10 psi, and the velocity 4 ft/s. At point B, 6ft higher than point A, the diameter is 2 ft and the pressure is 2ps
A floor is to be supported on hardwood timber joists that are spaced at 0.5m centres and span 5.0m. The joists support flooring 20mm thick and an applied live load of 2kN/m2
Find the relationship between a and b in the following equation that satisfy the Heat equation - What is the maximum displacement of the string at t = L/5 for the fifth mode? Explain how you determined that.
One liter of a solution is made by adding 3grams of acetic acid (HAc) to distilled water. The molecular weightof acetic acid is 60.052. The acid dissociation constant for aceticacid
You are going to assemble 1,000 bolt + hole combinations. The bolts have a mean diameter of 1.000 cm, normally distributed with standard deviation of 0.010 cm. The holes have a mean diameter of 1.030 cm, normally distributed with standard deviatio..
The top of the object is 1 m below the surface of the fluid. What are the magnitude and direction of the hydrostatic force acting on the top of the object.
How long can the turbines produce 380.0 MW of power from the release of the mass of stored water calculated above? Assume the water sustains a friction loss of 39.5 m2/s2 on the way down to the turbine.
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