Suppose that in one year a country produces 2.77 × 10" kilowatt-hours (kWh) of electrical energy from 4148 hydroelectric plants (1.00 kWh = 3.60 × 10° J). On average, each plant is 90.0% efficient at converting mechanical energy to electrical %3D energy, and the average dam height is 50.0 m. At 2.77 x 10 kWh of electrical energy produced in one year, what is the average power output Payg per Pavg W hydroelectric plant? What total mass of water m flowed over the dams during that year? kg m = What was the average mass of water mavg per dam that provided the mechanical energy to generate the electricity? mavg = kg What was the average volume of water Vavg per dam that provided the mechanical energy to generate the electricity? (The density of water is 1000 kg/m'.) Vavg m3 A gallon of gasoline contains 4.50 × 10' J of energy. How many gallonsn of gasoline did the 4148 dams save? n = gal

Suppose that in one year a country produces 2.77 × 10" kilowatt-hours (kWh) of electrical energy from 4148 hydroelectric plants (1.00 kWh = 3.60 × 10° J). On average, each plant is 90.0% efficient at converting mechanical energy to electrical %3D energy, and the average dam height is 50.0 m. At 2.77 x 10 kWh of electrical energy produced in one year, what is the average power output Payg per Pavg W hydroelectric plant? What total mass of water m flowed over the dams during that year? kg m = What was the average mass of water mavg per dam that provided the mechanical energy to generate the electricity? mavg = kg What was the average volume of water Vavg per dam that provided the mechanical energy to generate the electricity? (The density of water is 1000 kg/m'.) Vavg m3 A gallon of gasoline contains 4.50 × 10' J of energy. How many gallonsn of gasoline did the 4148 dams save? n = gal

An Introduction to Physical Science

14th Edition

ISBN:9781305079137

Author:James Shipman, Jerry D. Wilson, Charles A. Higgins, Omar Torres

Publisher:James Shipman, Jerry D. Wilson, Charles A. Higgins, Omar Torres

Chapter4: Work And Energy

Section: Chapter Questions

Problem NM: KEY TERMS 1. work (4.1) 2. joule 3. foot-pound 4. energy (4.2) 5. kinetic energy 6. potential energy...

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