Petroleum consumption in the US in 1990?supplied about 33.3E15 kJ of energy.?Of

Question

Petroleum consumption in the US in 1990?supplied about 33.3E15 kJ of energy.?Of this quantity, about 15.2E15 kJ was supplied by foreign sources.?The transportation sector is the major user of petroleum,?accounting for 23.2E15 kJ of consumption. Overall automobile fuel?economy in the US was about 21 miles per gallon in 1990.?Automobile efficiencies in Europe and Japan were about 27 mpg. ?If the US had averaged 27 mpg in 1990, how much less petroleum ?(expressed as kJ) would have been imported??

Calculate fractional savings due to mileage change. Calculate energy saved. Calculate fraction of oil that is imported. Calculate savings.

Explanation / Answer

well the fractional savings of energy is simply (27-21)/27 = 2/9. This saves 23.2 E15 * (2/9) = 5.16 E15 kJ. Fractional savings on transportation is 5.16/23.2 = .222; Fractional savings on oil importation is 5.16/15.2 = .339. Anything else needed just ask.

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.