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VN
1
23 tháng 5 2021
There are many types of energy sources. In a world where the instability of both society and nature is increasing, the issue of energy is a hot issue of great concern. Fossil energy sources, which have been considered as the main source of energy, are gradually becoming scarce and are also the cause of many immobility and disputes between countries around the world. The following energy sources are available: Nuclear Energy, Compressed Natural Gas; Biomass energy; Geothermal energy. Meanwhile, as scientists predict, with the current rate of exploitation and use of fossil resources, within a few centuries our descendants will have to bear serious consequences. Since then, the need for alternative energy sources has become more and more urgent, and more and more alternative energy research projects have been started and developed. However, not 100% of them are suitable for future development.
TT
31 tháng 3 2021
Solar energy collected on Earth is the energy of the stream of electromagnetic radiation coming from the Sun to Earth. We will continue to receive this stream of energy until the nuclear reaction on the Sun runs out of fuel, about 5 billion years from now.
This energy can be obtained directly through the photoelectric effect, which converts the solar photons energy into electricity, as in the solar cell. The energy of the photons can also be absorbed to heat objects, i.e. convert to heat, used for solar water heaters, or boil water in the solar tower's thermoelectric machines, or heat systems such as solar air conditioners.
The energy of the photons can be absorbed and converted into energy in the chemical bonds of photochemical reactions.
A natural photochemical reaction is photosynthesis. This process is thought to have stored solar energy in non-renewable fossil fuel sources that the industries of the nineteenth to twenty-first centuries had been making use of. It is also the process that energizes all natural biological activities, for livestock traction and firewood, traditional renewable bioenergy sources. In the future, this process could help create renewable energy sources in biofuels, such as liquid fuels (biodiesel, vegetable oil fuel), gas (biogas) or solid. .
Solar energy is also absorbed by the Earth's hydrosphere and Earth's atmosphere to produce meteorological phenomena containing exploitable forms of energy reserves. The Earth, in this energy model, resembles the water heater of the early heat engines, converting the heat absorbed from the Sun's photons into the kinetic energy of the currents of water, steam and air. , and alter the chemical and physical properties of these flows.
The potential of rainwater can be stored in dams and run the generator of hydroelectric plants. One form of making use of the energy from rivers and streams that existed before hydroelectricity was the water mill. The currents of the sea can also move the generator of a power plant using the currents of the sea.
The flow of the air, or wind, can generate electricity by turning a wind turbine. Before wind power generators were introduced, windmills were used to grind grain. Wind energy also causes wave motion across the sea surface. This movement can be utilized in power plants using waves.
Oceans on Earth have a greater specific heat than air and therefore change temperature more slowly than air when absorbing the same heat of the Sun. The ocean is hotter than air at night and colder than air during the day. This difference in temperature can be exploited to run heat engines in power plants that use the heat of the sea.
When the absorbed heat from the Sun's photons evaporates the seawater, some of that energy is stored in separating the salt from the salt water of the sea. The power plant uses the reaction of fresh water - salt water reclaim this energy when it brings fresh water from the river back to the sea.
CD
2
QD
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.
HT
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.
NT
1
K
22 tháng 8 2020
Paragraph:
The Earth is gradually running out of resources. Resources are scarce day by day, so scientists are researching and looking for new resources. In temperate countries, due to have many the wind, the wind is used to generate electricity. In tropical countries, due to having much sunshine, the sunshine is used to generate electricity. And a lot of countries in the world use different resources instead of using water to generate electricity.
Traslate:
Trái đất đang dần cạn kiệt tài nguyên. Nguồn tài nguyên khan hiếm từng ngày, vì vậy các nhà khoa học đang nghiên cứu và tìm kiếm những nguồn tài nguyên mới. Ở các nước ôn đới, do có nhiều gió nên gió được dùng để sản xuất điện. Ở các nước nhiệt đới, do có nhiều ánh nắng mặt trời nên ánh nắng mặt trời được sử dụng để phát điện. Và có rất nhiều quốc gia trên thế giới sử dụng các nguồn tài nguyên khác nhau thay vì chỉ sử dụng nước để tạo ra điện.
TT
2
3 tháng 5 2017
Đây nhé bạn! bạn học chương trình mới phải không? Thế thì chắc đoạn văn này bạn sẽ hiểu một cách dễ dàng!
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.
(Một số từ mk tra Google dịch đấy. Không biết có sai ko mong bạn sửa giùm mình. Hì Hì)
MH
28 tháng 5 2017
At present, most of our energy comes from fossil fuels (coal, oil and natural gas). However, reserves are limited. Because demand for electricity is rising rapidly, fossil fuels will be exhausted in a relatively short time. Therefore, people must develop and use alternative energy sources.
An alternative energy source is nuclear power. Nuclear power can provide enough electricity for the needs of the world for hundreds of years, but it can be very dangerous. An alternative source of geothermal energy comes from deep within the earth. Scientists use heat to generate energy. However, this energy is only available in some parts of the world.
Sun, water and wind are alternative sources of energy. Wind rotating the windmill and moving the sailboat. 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. Many countries use solar energy for their daily lives. Solar panels on the roof can generate enough energy to heat or cool the entire home. Solar energy is not only abundant and infinite but also clean and safe.
Despite some drawbacks, the potential of alternative energy sources is enormous. However, how to make full use of the energy resources is a question for researchers all over the world.
Translate into English
Hiện nay, phần lớn năng lượng của chúng ta là từ nhiên liệu hóa thạch (than, dầu và khí tự nhiên). Tuy nhiên, trữ lượng còn hạn chế. Do nhu cầu điện tăng nhanh nên nhiên liệu hóa thạch sẽ cạn kiệt trong một thời gian tương đối ngắn. Do đó, người dân phải phát triển và sử dụng các nguồn năng lượng thay thế.
Một nguồn năng lượng thay thế là điện hạt nhân. Năng lượng hạt nhân có thể cung cấp điện đủ cho nhu cầu của thế giới hàng trăm năm, nhưng nó có thể rất nguy hiểm. Một nguồn năng lượng địa nhiệt thay thế đến từ sâu trong lòng đất. Các nhà khoa học sử dụng nhiệt để tạo ra năng lượng. Tuy nhiên, năng lượng này chỉ có ở một số nơi trên thế giới.
Mặt trời, nước và gió là những nguồn năng lượng thay thế. Gió xoay cối xay gió và di chuyển thuyền buồm. Đó là một nguồn sạch và rất nhiều năng lượng. Thật không may, nếu gió không thổi, không có năng lượng gió. Khi nước di chuyển từ nơi này sang nơi khác, nó làm cho năng lượng. Tuy nhiên, người ta phải xây đập để sử dụng nguồn năng lượng này. Các đập tốn rất nhiều tiền, vì vậy nước cũng đắt.
Mặt trời phát ra lượng năng lượng lớn mỗi ngày. Năng lượng này có thể được chuyển thành điện. Nhiều quốc gia sử dụng năng lượng mặt trời cho cuộc sống hàng ngày của họ. Các tấm pin mặt trời trên mái có thể tạo ra đủ năng lượng để sưởi ấm hoặc làm mát toàn bộ ngôi nhà. Năng lượng mặt trời không chỉ phong phú và vô hạn mà còn sạch sẽ và an toàn.
Mặc dù có một số hạn chế, tiềm năng của các nguồn năng lượng thay thế là rất lớn. Tuy nhiên, làm thế nào để tận dụng các nguồn năng lượng là một câu hỏi cho các nhà nghiên cứu trên toàn thế giới.
_ Good luck _
LS
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.
CT
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.
20 tháng 3 2019
Toán: Mathemas (Maths)
Vật lý: Physics
Hóa: Chemistry
Sinh học: Biology
Địa lý: Geography
Công nghệ thông tin: Information Technology
Mỹ thuật: Fine Art
Văn học: Literature
Lịch sử: History
Kỹ thuật: Engineering
Tin học: Informas
Công nghệ: Technology
Chính trị học: Polis
Tâm lý học: Psychology
Nhạc: Music
Thủ công: Craft
Thiên văn học: Astronomy
Kinh tế học: Economics
Khoa học xã hội: Social Science
Ngoại ngữ: Foreign language
Giáo dục thể chất: Physical Education
Giáo dục tôn giáo: Religious Education
~ Học tốt~
#Bắp
20 tháng 3 2019
Literature
Maths_Mathemas
Science:
- Biology
- Chemistry
- Physics
Geography
History
Phylosophy
I.T._ Information Technology
P.E._Physical Education
Arts
Music
Languages:
English
Japanese
French
etc.
NT
1
2
5 tháng 5 2021
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.
+ solar energy
+ water energy
+ wind energy
solar energy
wind energy
nuclear energy