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Wheeling-Pittsburg steel is investigating whether it should replace some of its basic oxygen furnace equipment now or wait to do it later. The cost later (3 years from now) is estimated to be 1,700,000. How much can the company afford to spend now, if its minimum attractive rate of return is 1.5% per month?
You borrow $1000 and pay off the loan with interest after 4.5 years. The amount paid is $1500. What is the effective annual interest rate for this loan. Use a 6 month interest period.
Identify the contaminants on site and explain their hazards in relation to the proposed design and its construction. Describe the ‘In-situ’ and Ex-situ’ treatments that could be used and their relative merits
Assume the plane is flying at an altitude of 32,810 ft (10 km), where the temperature is -8 C and the pressure is 250 mb. The Pitot-static tube measures a piezometric pressure difference corresponding to 1.206 psi. What is the airspeed in both m/s..
It has been reported that a peat biofilter treating styrene had a maximum elimination capacity of 100 g/m^3-hr,and a critical load of between 60-75 g/m^3-hr. Further investigation reveals that a 97% efficiency was acheived at a load 40 g/m^3-hr.
A 1.6-m wide rectangular channel carries 1.8 m3/s at a depth of 0.85 m. The channel undergoes a smooth transition in which the channel bottom rises 15 cm and contracts to a width of 1.3 m. Assuming friction losses are negligible, determine the dep..
Stormwater controls are typically designed by civil engineers. Stormwater is collected in pipes below the ground and routed to nearby surface water
The specifications for a project specify that the in-situ soil must be compacted to 98% of its maximum Modified Proctor Density. What is the range of water contents of the in-situ soil that will meet this criteria
A 30-ft-high, 1-ft-diameter pipe is welded to the top of a cubic container 13 ft * 3 ft * 3 ft2. The container and pipe are filled with water at 20°C. Determine the weight of the water and the pressure forces on the bottom and sides of the contain..
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).
Give a few examples of movable bridge designs, that build with a certain robotics toolkit (VEX) kit. Specify the dimensions of the bridge design and the materials needed to build it from a VEX kit.
The motion is described by the second Newton's law: m(d^2y/dt^2) + a(dy/dt) + ky = 0 where y is the body displacement in m, t is the time in s, a > 0 is the friction coeffcient in kg/s and k is the spring constant in kg/s2.
A completely reversible air conditioner provides 21,000Btu/h of cooling for a space maintained at 81degF while rejecting heat to the environmental air at 91degF.
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