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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: ___________
How will calculate the surface area of a rectangular open trench Length=100 mtr,Width=.6mtr,Depth= .75mtr.
A loose, uncompacted sand fill 6 ft in depth has a relative density of 40%. Laboratory tests indicated that the minimum void ratios of the sand are 0.46 and 0.90, respectively. The specific gravity of solids of the sand is 2.65.
What is the settling velocity of a .5 micrometer silica sphere at 20 degrees Celsius and an ambient pressure of 150 kPa. The density of silica is 2600 kg/cubic meter.
(a) Use differentiation to find a general expression for the rocket's velocity as a function of time, (b) When is the velocity zero?
A 25-W compact fluorescent lightbulb (CFL) produces the light equivalent of a 100-W incandescent bulb. The population of North America is estimated to be about 305 million. Estimate the amount of coal needed to light one 100-W incandescent lightbulb
many years ago well-known architect frank lloyd wright nbspdesigned a mile-high skyscraper which has never been built.
A fully loaded, ocean going container ship is just stable about its longitudinal axis (roll). The ship has a total weight of 155,000 tons, length = 1,600 feet and a beam = 150 feet (assume that it is the shape of a rectangular box). Calculate the ..
an investment of $80,000 is projected to generate escalated dollar net revenues (income minus costs) of $10,000 in year one, $30,000 in year 2 and $40,000 in year 3 with a $100,000 salvage value at the end of year
estimate the theoretical production of landfill gas (CH4 only) from the degradation of 20.3 kg of rapidly decomposable MSW. asssume the density of methane is 0.7177 kg/m^3.
Find the minimum length of runway required for the landing (I found to be 300ft). Find the position on the runway where the speed is 50ft/s and the time it takes for the speed to reach 50ft/s
what is the equivalent PF rate constant that would be used to describe treatment in a series of three CM reactors in terms of flow (Q), the total volume in the system (V), and the rate constant observed for the CM system
The owner wish to achieve an initial acceleration from rest of 15 ft/s^2 on a level paved surface. What is the maximum coefficient of road adhesion needed to achieve this acceleration
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