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Last year Penn State recycled 89 tons of cans and prevented them from going to the landll.
(a) Diesel fuel has an average chemical formula of C12H23 and a density of 6.45 lb/gal. Calculate how many lbs of CO2 are produced per gallon of diesel burned (assume complete combustion). (molecular weights: C = 12 g/mole, H = 1 g/mole, O = 16 g/mole).
(b) The landll is 70 miles away while the recycling center is 7 miles away. Assume that a 10 ton diesel garbage truck gets 2.8 mpg when full and 4 mpg when empty. How many lbs of CO2 are saved in transportation alone by recycling the cans? Assume the recycling truck and the garbage truck get the same mpg and that both trucks return empty. (Answer = 6945 lbs CO2).
(c) The production of aluminum (for cans) requires 13 kWh/kg of aluminum while producing aluminum from recycled cans requires 0.65 kWhr/kg. How many lbs of CO2 are saved per year in manufacturing from PSU recycling? Assume that 80% of the energy comes from coal (2.1 lb CO2/kWhr) and 20% from natural gas (1.3 lb CO2/kWhr). (1 metric ton = 1000 kg)
Calculate the freezing point of aqueous 0.369 m LiCl on the assumption that it is 100% dissociated. Calculate the freezing point if the percent dissociation is 0%.
Assume a cross-sectional medial length of 32 in. (no stretching of the sheet due to bending). If the maximum shear stress must be limited to 19 ksi, determine the maximum torque that can be carried by the hollow section
Calculate the temperature of "flat world" that has an albedo of 0.31 and a solar flux of 1370 w/m^2. One side of flat world faces the sun. Ignore energy emitted from the edge of flat world.
A horizontal curve is being designed around a pond with a tangent length of 1200 ft and central angle of 0.5211 radians. If the PI is at station 145 + 00, determine the station of PT.
The aquifer characteristics are: Ambient temperature=8 oC Hydraulic conductivity = 123 ft/day Hydraulic gradient = 0.00091 ft/ft Effective porosity = 0.31 Total organic carbon = 198 mg/kg Bulk density = 1.65 g/cm3
Find the discharge flowing over a rectangular sharp crested wire, in GPM, which has a width of 9.9 feet and a discharge coefficient of 3.24, if the head above the crest is 1.74 feet.
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Water flows past a triangular flat plate oriented parallel to the free stream as shown. Integrate the wall shear stress over the plate to determine the friction drag on one side of the plate. Assume laminar boundary layer flow.
A crane is placed along the easterly sideline of a building, but 25 feet from the front of the building. The building to be erected is a 6 story building that is 100 feet wide by 50feet deep. YOu may assume that each story is 15 feet.
A rod of steel is 20 m long at a temperature of 200C. find the free expansion of the rod when the temperature is raised to 650C. Find the temperature stress produced
(a) Determine the desired diameter of the disk. (b) If the rubber strain is not to exceed 0.2 in/in, determine the maximum allowable compressive force. Recall that the spring constant, k=Fx,or in terms of an axially loaded member
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..
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