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In a Reuters News Report Dated February 3, 2010, President

question 99

Multiple Choice

In a Reuters news report dated February 3, 2010, President Obama is quoted as saying, "By 2022 we will more than double the amount of biofuels we produce to 36 billion gallons, which will decrease our dependence on foreign oil by hundreds of millions of barrels per year." Use the following information to determine the fraction of our projected 2022 total energy demand this target represents to assess its significance. (M  mega  10⁶) U.S. projected annual energy demand in 2022: equivalent of 22  10³ Mbarrels of oil
Energy density of oil: 5.9 $In a Reuters news report dated February 3, 2010, President Obama is quoted as saying, By 2022 we will more than double the amount of biofuels we produce to 36 billion gallons, which will decrease our dependence on foreign oil by hundreds of millions of barrels per year. Use the following information to determine the fraction of our projected 2022 total energy demand this target represents to assess its significance. (M  mega  106) U.S. projected annual energy demand in 2022: equivalent of 22  103 Mbarrels of oil Energy density of oil: 5.9 MJ/barrel Energy density of biofuels: 100 MJ/gal Mass density of petroleum: 900 g/L Mass density of biofuels: 800 g/L 1 gal  3.785 L A) 2.8% B) 3.6% C) 9.2% D) 4.5% E) 1.8%$ MJ/barrel
Energy density of biofuels: 100 MJ/gal
Mass density of petroleum: 900 g/L
Mass density of biofuels: 800 g/L
1 gal  3.785 L

Definitions:

Water Table

The level below the Earth's surface where the ground is completely saturated with water, forming the upper surface of the groundwater.

Ground Water

Underground water stored in soil or within rock pores and cracks.

Hydraulic Gradient

The slope of the water table or potentiometric surface, indicating the direction and rate of groundwater flow.

Limestone Cave

A natural underground space formed by the dissolution of limestone rock by water.