• 18기 북클럽

    • 방장 : 미르나래
    • 대상 : 중학생
    • 도서수준 : 고전 & 과학

    고전과 과학을 함께 (중학생이 운영하는 북클럽입니다)

  
[18]Electricity and Magnetism 3차 미션

글쓴이 미르나래

등록일 2013-08-21 00:39

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http://www.suksuk.co.kr/momboard/CAX_090/4994

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Q1. On page 31, there is an experiment using a lemon. How does the lemon act as a battery?

 

 

Q2. What do you think about solar energy? List the good things and(or) bad things, then state your opinion.

 

 

 

 

 

To be answered by 9/1 after reading chap1.3(28~39p)

 

 

 

 


마이 페이지 > 스크랩북에서 확인하실 수 있습니다. 소중한 글에 감사 댓글 남겨주세요.

        
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Erin37 2013-09-29 18:07 

Q1. It is because the lemon acts as a electrolyte.

Q2. Solar energy isn't harmful to nature, and has a never ending source of energy, the sun. But it is very pricey, and while building the solar energy system, it must have a place to be built, and it will harm nature in that process. I think the main point here is that, will it harm nature more in the building process, or will it benefit nature more when finished. But for now, the solar energy system is not fully grown. And I think it's too early to encourage the building of solar energy.

directioner 2013-09-06 00:06 

1. The paper clip and the penny is made out of zinc and cooper. Zinc loses electron easily and cooper doesn't lose electron not easily. But, if you just leave zinc and cooper alone, electrons don't move, so you need something to move the electrons, by using a thing that eletric current flows easily. This is called the electrolyte. And the lemon is the elctrolyte, because it contains acid so electric current flows easily in lemon, I think.

2. The good things about solar energy is that you don't have to worry about not using solar energy, because as we all know, sun is not something that can't last forever like things such as coal, oil etc... And it isn't also harmful to the nature. The sun is the nature itself so it doesn't pollute air, earth, or water so it's very good for the nature, and we don't have to worry about things like "Oh, there's not much solar energy left to use." But, there are some bad things about the solar energy, too. During cloudy days or rainy days, we can't use the solar energy since the solar energy comes from the sun. Also, it needs a lot of space to use the solar energy so not many people can use it easily. Even though using solar energy can be expensive for some people, it still has many good things about it, so I recommend that we should use the solar energy.

annie0717 2013-09-01 21:45 
1. A lemon certainly looks different from a battery, but is very much like one in the field of electronics. The energy for the battery does not come from the lemon, but from the chemical charge in the ****l. The ****l exchanges some of its electrons to decrease its state of energy, thus releasing the energy, which is, of course, an electronic charge.
2. I strongly propose the development of solar energy. It is renewable and abundant, which makes it eco-friendly. Solar energy will be a great solution to environmental problems that have arisen recently, such as global warming, which is mainly cause by the burning of fossil fuels which lead to the mass release of carbon dioxide. Also, it saves electricity costs. People who oppose this motion usually argue about the vast amounts of money used to develop and store solar energy. However, these harmful effects due to lack of money are only short-term. In the long-term, solar energy will give benefits to our economy because we will not need to spend money on electricity bills, and thus use the money for a better cause. Furthermore, it requires low maintenance. Electricity is difficult to manage and machines tend to break down easily. Other green-tech solutions such as wind turbines require frequent management. However, solar energy panels only need to be cleaned several times a year, and do not break down easily. Lastly, we can always store solar energy during when it is most abundant, which is the day, and use it continuously at night, when we cannot depend on solar energy, and therefore the lack of solar energy in the dark is not a problem.
(I know this isn't the format you suggested, but I think I can organize my thoughts better this way.)
빛나는지 2013-09-01 15:20 

1. In this experiment, they used a lemon, and I often read books about turning on a light bulb using a lemon. Using a lemon as a battery, it must mean that it could do the same job as an electrolyte. It should interact chemically with the electrodes to separate charges and produce a flow of electrons from the negative terminal to the positive terminal. Well, I don't know exactly, but I think the reason is that it's somewhat similar to the way it works with saltwater, and the fact that areas of a lemon is divided.

2. I think a solar cell is a terrific idea. It is difficult to make and is expensive, but technology can be improved through time. We cannot rely on it entirely, because we cannut use it during the night, or in other cases that are dark, but we can use it with another source of energy, and I believe it can help solving global warming.


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