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$\bullet$ $\bullet$ U.S. power use. The total consumption of electrical energyin the United States is about $1.0 \times 10^{19}$ joules per year.(a) Express this rate in watts and kilowatts. (b) If the U.S. popu-lation is about 310 million people, what is the average rate ofelectrical energy consumption per person?
a) $3.17 \times 10^{8} \mathrm{kW}$b) $1.22 \times 10^{3} \mathrm{W}$
Physics 101 Mechanics
Chapter 7
Work and Energ
Physics Basics
Applying Newton's Laws
Kinetic Energy
Potential Energy
Energy Conservation
Cornell University
University of Washington
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So we know that what is basically power, which is Jules for a second. So the unit of power is actually what's, which is Jules for a second. So that's kind of loose or second. And ah, we can convert the unit off year, two seconds for party so that we can speed, which is equal to one times 10 to the bar, 19 Jews per year. And we can avert that toe Jules for a second. So to do so, we have 3 65 days in the year, then 24 hours in a day as then. That is 600 seconds in an hour. So from here we see this becomes 3.2 times 3.2 10 to 11. What are in terms of Philo? What? It's 3.2 times 48 Killer woods. So that's the total consumption ofthe United States. So per person, we need to get depart consumption per person. We need to divide the whole park conception by the total amount of person that we have. So x follower by person, it would be equal to that ornament, Ari. Use it, which is 3.2 times into the bar, eight in the warts, divided by 310,000,000 people. So 310 dimes and where? Six person. What is it? One kilowatt. Oh, fire person. There's an approximate, uh, answer. Thank you.
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