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Two changes to the CAFE standard for US automobiles are being considered. A more conservative increase from 27.5 mpg in 2011 to 35 mpg by 2020 is supported widely in Washington. California and 13 other states + the District of Columbia hope to increase that stander to 35 mpg by 2017 and 40 mpg by 2020. Calculate total CO2 emissions from two polices from 2011 to 2020 in kg of CO2 for a fleet of 240 million cars (all the cars in the US). Assume that all cars are driven 10,000 miles/year. Model gasoline as octane (with the chemical formula C8H8) and assume it has a density of 0.7 g/ml.
Total CO_2 emission from conservative CAFE: _________
Total CO_2 emission from aggressive CAFE: ___________
Determine the required size of new Schedule 40 steel pipe to carry 0.5 cfs (Q = 0.5 cfs) of water at 160o F with a maximum pressure drop of 10 psi per 1,000 ft.
Three stock car drivers are racing around a circular bend. They are each circling the bend at different radii: r(1)=249 m , r(2)=255 m , and r(3)=261 m . At a given instant, all three are traveling at the same transverse rate of rotation
Find the area of steel reinforcement required for a concrete T-beam for the following data; f'c = 3 ksi, fy=60 ksi,d=18 in, t= 4.5 in., bw= 10 in., bf= 36 in., 3/4" aggregate, and the section sustains a total factored bending moment 82 k-ft.
if a residential space heater burns anthricite coal having a sulfur of 2.85% what would be the emissions of sulfur dioxide from having burned 900 ib of this coal. use ap-42 table 1.2-1 sulfur dioxide emission=[SO2] pounds.
If the motorist wishes to pass the light just as it turns green without having to stop, what is the required uniform deceleration of the car and what is the speed of the car as it passes the light
how far back from the front axle would the center of gravity have to be to ensure that the maximum tractive effort developed for front- and rear- wheel-drive options is equal (assume that all other variables are unchanged)
Water with a static pressure of 1.96kN/M 2 flows through an 800 mm diameter pipe. A pitot tube pressure gage in this pipe reads a pressure of 5.88 kN/M 2 . How do you determine the volume flow rate (Q) of the water? (Q = 1.40 M^3/sec, V=2.79 M/se..
Finally, the wreckage is removed, and the freeway is restored to full capacity (4000 veh/h) at 8:31 a,. Assume D/D/1 queuing to determine time of queue dissipation, longest queue length, total delay, average delay per vehicle, and longest wait of ..
Nighttime traffic on a single lane of rural highway is light, with a flow of 40 vehicles/hour , and is well described by a Poisson arrival process.
How is this optimal loading changed if the maximum truck speed is changed from 35 to 45 mph or to 25 mph? What would these changes do to the cost of this particular job?
a solid wooden cube (.5*.5*.5 m^3) is floating in water and 0.2 of the cube extends above the water surface. Determine the specific weight of the wood.
An engineering student, recognizing that the "ideal gas law" requires gas velocity to be function of temperature, suggests that an easy way to increase efficiency would be to change the temperature of the exhaust gas being treated.
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