신재생에너지 최종본

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신재생에너지 최종본

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본문내용

1. Identify the principle energy sources used worldwide and classify them as either renewable or non-renewable.
세계적으로 사용되는 에너지자원을 확인하고, 그들을 재생과 비재생 에너지로 분류하라.
10쪽 world 2003 그림 사용
The principal sources of energy used worldwide are oil, coal, natural gas, nuclear, hydro, renewable energy as a picture.
세계적으로 사용되는 에너지자원은 그림에서와 같이 석유, 석탄 , 천연가스, 원자력 ,수력, 재생에너지가 있다.
Renewable energy sources among others were used only 1% in the 2003s.
그 중 재생에너지는 2003년에 단지 1% 사용되었다.
We can classify energy sources as either renewable or non-renewable.
에너지자원을 재생에너지와 비재생에너지로 분류할 수 있다.

<중 략>

charpter3. 단원
1. The pendulum of a clock swings back and forth. At what position will its kinetic energy be the greatest? At what position will its kinetic energy equal its potential energy?
At first, let`s learn about kinetic energy and potential energy. Kinetic energy is the energy that is produced when something moves and Potential energy is energy stored within a physical system as a result of the position or configuration of the different parts of that system.
ㅇ answer :
The kinetic energy of the pendulum are maximized at the bottom of the figure where the potential energy is zero. The figure below summarizes this information in a qualitative manner. U signifies potential energy, and KE signifies kinetic energy.)

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