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10 tháng 3 2019

Solar, light and heat radiation from the sun, has been exploited by humans since ancient times using a growing array of technologies than ever before. Solar radiation, along with secondary resources of solar energy such as wind and wave power, water and biomass, make up most of the renewable energy available on Earth. Only a very small fraction of the available solar power is used.

Solar power means generating electricity based on heat and photovoltaic cells. The use of solar energy is limited only by human ingenuity. Partial list of solar applications space heating and cooling through solar architecture, through distillation of drinking water and sterilization, daylight illumination, solar hot water , Solar cooking, and high temperature process heat for industrial purposes. To collect solar energy, the most common way is to use solar panels.

Solar technology is widely described as either passive solar or active solar energy depending on how they capture, convert and distribute solar energy. Active solar engineering involves the use of photovoltaic panels and solar thermal power to harness the power. Passive solar engineering involves orienting a building towards the sun, selecting materials with favorable heat mass or dispersed light property, and designing natural air space.

10 tháng 3 2019

thanks nhưng bn có bài nào ngắn hơn ko

18 tháng 4 2022

n our daily life, energy play a very important role, so we should save energy. I think there are many ways to save energy and now I will share with you some ways to save energy effectively. Firstly, we should turn off all the electric appliances when we don't use them such as: lights, fans, air conditioner...… Secondly, we can use solar energy or wind energy instead of electric energy in our house. It will help us save more money. Thirdly, we can go to school or go to work on foot, by bike or by public transport instead of motorbike or car. By these ways, the energy will be saved.

 

Bài dịch

Trong cuộc sống hằng ngày của chúng ta, năng lượng đóng một vai trò vô cùng quan trọng, vì thế chúng ta nên tiết kiệm năng lượng. Tôi nghĩ có nhiều cách tiết kiệm năng lượng và bây giờ tôi sẽ chia sẻ với các bạn một số cách tiết kiệm hiệu quả. Đầu tiên, chúng ta nên tắt tất cả những thiết bị điện khi không sử dụng như đèn, quạt, điều hòa…. Thứ 2, chúng ta có thể sử dụng năng lượng mặt trời hay năng lượng gió thay cho điện ở trong nhà của chúng ta. Nó sẽ giúp chúng ta tiết kiệm được rất nhiều tiền. Thứ 3, thay vì đi ô tô hay xe máy, chúng ta có thể đi bộ đi học hoặc đi làm. Bằng những cách này, chúng ta có thể tiết kiệm được rất nhiều năng lượng.

8 tháng 4 2022

tham khảo:

Sun water and wind are alternative sources of energy.Wind rotating the windmill and moving the sail .It’s a clean source and a lot of energy .Unfortunately, if the wind does not blow .there is no wind energy.As water moves from one place to another , it makes energy.However, people have to build dams to use this energy source.The dams cost a lot of money , so water is expensive too.The sun releases large amounts of energy each day.This energy can be converted into electricity .  Solar energy is not only abundant and infinite but also clean and safe.Desfite some drawbacks , the potention of onternative energy sources is enormous .However , how to make full use of the energy resources is a question for researchers all over the world.

8 tháng 4 2022

Mình cần ý chính là những vật sử dụng năng lượng mặt trời nha bạn >.< Nhg dù gì cx cảm ơn bạn vì đã góp ý 'v'

22 tháng 3 2017
With fast growth of civilization there is also an ever mounting need for energy. Energy may be in the form of fuels or electricity. Petrol is a liquid fuel which is used widely nowadays. But this kind of fuels is likely to be exhausted at the rate man is using it recently.

To meet the challenge, various methods have been suggested. One is to minimize the man’s demand in using the energy. Non-essential consumption should be minimized. During certain days of the year, people all over the world turn off the electricity for 1 hour to save the energy. Modern gadgets consuming energy should only be used when they are absolutely necessary.

Energy conservation is possible through modernization of plant and equipment. People should replace the obsolete equipment by the modern ones.

Energy can be saved on transport by the following methods. People should commute by the rail rather than by cars and vans. The transport must be improved with a view to sparing the energy. Cities must be planned in such a way that the commuting distance from this place to others is minimized.

In industry, many things could be done to reduce waste of energy or to economize energy. The machine maintenance needs to be tightened; heater must be utilized properly. When systems are streamlined, economy in fuel is obvious. Instead of using materials requiring higher energy, those which require lower energy should be used.

We hope man with his ever rising urge for existence will cope up with this urgent problem and find alternatives.

27 tháng 3 2017

We need energy to live and work. Our major source of energy is oil. Oil is one kind of fossil fuel. The amount ot fossil fuels in the world is limited. Therefore, we must save it, and at the same time, we must find new sources of energy. Geothermal heat and nuclear power are alternative sources of energy. They can give us electricity. Other alternative sources are the sun, waves and water. These sources are not only unlimited and available but also clean and safe for the environment. People should develop and use them more and more in the future.

27 tháng 3 2017

Coal is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers or veins called coal beds or coal seams. The harder forms, such as anthracite coal, can be regarded as metamorphic rock because of later exposure to elevated temperature and pressure.

Coal gasification can be used to produce syngas, a mixture of carbon monoxide (CO) and hydrogen (H2) gas. . The use of coal as fuel causes adverse health impacts and deaths. Coal mining and coal fueling of power station and industrial processes can cause major environmental damage.

6 tháng 4 2018

Nowadays, energy is being run out more and more so it is one of the most important things of our life. We need to save energy because nobody of us can lives without energy. So why don't we start to do it right in our home? We have many ways to save energy in our home. One of those ways is using electricity, water and gas economically. Such as we should turn off the light in room when we go out or in unnecessary situations, avoid wasting water, shut the kitchen stove when stop cooking. Use a microwave instead of a stove to reheat food. Use rechargeable batteries instead of disposable batteries... Besides, we should use electrical equipments which are energy - saving. Such as using lights and fans that have low capacity, or using equipments which reserve electricty. Not only do these help us to save money but also they work effectively.
In addition, we should frequently check electrical equipments in our home in order to fix opportunely. In summary, we need to save energy so that energy isn't run out and continues to serve human's life.

6 tháng 4 2018

Đoạn văn này nói về việc tiết kiệm năng lượng ở nhà , coi như có bảo vệ năng lượng nhé !

Nowadays, energy is being run out more and more so it is one of the most important things of our life. We need to save energy because nobody of us can lives without energy. So why don't we start to do it right in our home? We have many ways to save energy in our home. One of those ways is using electricity, water and gas economically. Such as we should turn off the light in room when we go out or in unnecessary situations, avoid wasting water, shut the kitchen stove when stop cooking. Use a microwave instead of a stove to reheat food. Use rechargeable batteries instead of disposable batteries... Besides, we should use electrical equipments which are energy - saving. Such as using lights and fans that have low capacity, or using equipments which reserve electricty. Not only do these help us to save money but also they work effectively.
In addition, we should frequently check electrical equipments in our home in order to fix opportunely. In summary, we need to save energy so that energy isn't run out and continues to serve human's life.

23 tháng 3 2017

wtp ktra hok kì nhanh thế

21 tháng 5 2019

My hobby is collecting books. I collect books whenever I have more need for some books. I collect many kinds of books such a love story books or textbooks I am learning at school, you know, Maths, History, Geography, Biology: and books about nature. I buy books from a bookshop near my house, and some other stores. I also get books from my friends. I collect books because I would to learn from books.  They help me broaden my knowledge. In the future, I try to make my collection larger. I would open a book store of my own.

Dịch : 

Sở thích của tôi là sưu tầm sách. Tôi sưu tầm sách bất cứ khi nào tôi cần nhiều sách hơn. Tôi sưu tầm nhiều loại sách như một cuốn truyện hay sách giáo khoa mà tôi đang học ở trường, bạn biết đấy, Toán, Lịch sử, Địa lý, Sinh học: và sách về thiên nhiên. Tôi mua sách từ một hiệu sách gần nhà tôi và một số cửa hàng khác. Tôi cũng nhận được sách từ bạn bè của tôi. Tôi sưu tầm sách vì tôi muốn học từ sách. Chúng giúp tôi mở rộng kiến thức của mình. Trong tương lai, tôi cố gắng làm cho bộ sưu tập của mình lớn hơn. Tôi sẽ mở một cửa hàng sách của riêng mình.

21 tháng 5 2019

I have many hobbies, but I reading most. Books are always a good friend to me. It is a good way to improve my vocabularies by exposing many new words. By reading, I get better at concentration because it requires me to focus on what I am reading for long periods. It also opens up the knowledge door for me. Reading books tell me about the world's history, let me see the structure of the brain, or bring me a story of Sherlock Holmes. I think reading is one of the most interesting indoors activity.
Bài dịch
Tôi có khá nhiều sở thích nhưng đọc sách là một trong những sở thích mà tôi thấy thú vị nhất và sách luôn là người bạn thân thiết đồng hành cùng tôi. Đọc sách giúp tôi nâng cao vốn từ vựng bởi nó chứa đựng rất nhiều từ mới. Khi đọc tôi nhận được sự tập trung cao độ bởi nó đòi hỏi tôi phải tập trung và những gì tôi đọc trong thơi gian dài. Đọc sách cũng mở ra rất nhiều tri thức mới như tìm hiểu về lịch sử thế giới, biết được cấu trúc của não và biết được câu chuyện về Sherlock Holmes.Tôi nghĩ rằng đọc là một hoạt động trong nhà thú vị nhất đối với tôi

4 tháng 4 2022

Solar energy makes us have solar electricity, light to live. If you don't have solar energy, you will have to use electricity, but using electricity will cause a fire, so solar energy is very good.

5 tháng 5 2022

Energy is very important in our daily life. We use energy for almost everything we do. However energy is limited. We should do the following things to save energy. Firstly, we should use electricity more efficiently. Secondly, we had better reduce our electricity bills. Besides, it’s necessary to turn off the lights when leaving a room or before going to bed to save energy. Moreover, we ought to reduce the use of fossil fuels. In short, we should try our best to save energy for our future and for our planet’s future.