The first 800-word physics scientific paper
With the decrease of energy, people pay more attention to energy conservation. When I was in primary school, my teacher taught us to save energy, so that we human beings could live on the earth forever. In real life, most people still don't know how to save energy, so that saving energy is just something that can be said but not completely done, often because of the lack of scientific common sense of saving energy and? Tips? , causing some unnecessary waste. Now I'm going to introduce some tips for saving electricity at home.
1. Tips for saving electricity in rice cookers
There are two kinds of rice cookers on the market now: one is mechanical rice cookers, and the other is computer rice cookers. When using the mechanical rice cooker, cover the rice cooker with a towel, and be careful not to cover the air outlet, which can reduce the heat loss. When the rice soup is boiling, raise the button to dry the rice soup with the waste heat of the electric heating plate, then press the button and stew for 15 minutes. Be sure to unplug the power plug after using the rice cooker, otherwise the temperature in the rice cooker will automatically turn on when it drops below 70 degrees, which will not only consume electricity but also shorten the service life. Try to choose a high-power rice cooker, because cooking the same amount of rice, a 700-watt rice cooker is more time-saving than a 500-watt rice cooker. Computer rice cookers generally have high power, about 800 watts, which is more energy-saving.
2. Tips for saving electricity on TV sets
Television can save energy in the following ways: First, control the contrast and brightness. Generally, the power consumption of the brightest and darkest color TVs can range from 30W to 50W. It is suggested to turn on the low wattage fluorescent lamp indoors and adjust the contrast and brightness of the TV set to the middle. The second is to control the volume, which is loud and consumes high power. In addition, one way to save electricity is to watch DVD, preferably AV status. Because in the AV state, the signal is directly connected, which reduces the work of the TV tuner and naturally reduces the power consumption. Secondly, after watching TV, you can't turn it off with the remote control, but turn off the power on the TV. Because after the remote control is turned off, the TV is still in standby state and still using electricity. Under normal circumstances, the standby time is 10 hour, which is equivalent to consuming half a kilowatt hour. Finally, add a dust cover to the TV set. This can prevent the TV from inhaling dust and increase power consumption.
3. Tips for computer power saving
Try to turn off the power switch when not using the computer, which can reduce the power consumption. When not using the computer, cover it with a condom to prevent dust from entering the computer and reduce power consumption. It is also necessary to take out the motherboard and * components inside the host from time to time to clean them, so as to better reduce power consumption! ! Try not to use the computer.
Energy saving is very important. Everyone should use these skills and should not stop doing these things because it is too much trouble. These things are of great benefit to everyone, it's just a little effort. Relevant departments should also increase capacity and publicize more. Let all mankind save energy, which is not always available! Let each of us cheer and work hard for the benefit of future generations!
Physics of 800 words in scientific papers II
Learning and living can't be separated from paper, and the raw material of paper making is mainly the fiber of plants such as bark, but because people cut it blindly. There are fewer and fewer trees now, so we should save paper. It is everyone's responsibility to start from the little things around us.
Save paper? For us, it seems a little far away compared with saving water and electricity. Few people know the direct relationship between saving paper and protecting the ecological environment. Each of us uses paper every day, using different types of paper. Have you counted them? How many sheets of paper do you use every day? How much paper do you need a week? How many sheets of paper do you need from one month to one year? The result is amazing. Where does a piece of paper come from? Is paper made of trees? Change? Here it is. It often takes decades for a tree to be used by human beings. Human beings are heartless. With the sound of a chainsaw, the tree that had grown for decades fell to the ground. Wood was transported to the paper mill and turned into pieces of paper. Paper has brought convenience to human beings, but at the same time it has also brought great influence to forests. Trees can not only be used to make paper, but also provide wood. A large area of forest can conserve water, prevent soil erosion and purify the air. If there are no trees, there will be no oxygen, and then we will have no place to live. The harm of forest disappearance is great: the Loess Plateau was originally a forest, lush and endless, with green waves rippling. However, due to the destruction of people, the Loess Plateau has really become a plateau with only loess, and the earth has taken off its coat and exposed its yellow skin, which is so sad.
What is March 12 every year? Arbor Day? . On this day, we all take tools to plant trees. Now the forest coverage in China has increased. This is the result of human introspection, which is gratifying.
However, although the forest coverage rate has increased, it is still very low. Therefore, afforestation is an arduous task and an eternal task for mankind. It's winter now, although it's past the best time to plant trees, but we can spread it in our hearts? Save paper? Seeds, planting? Planting trees? By the next spring, these trees will sprout and grow tall. We can go outdoors with tools, sow the seeds of trees on the earth, take good care of them and make the motherland full of green! Protect us from wind and rain. Save paper, start with me.
Science and technology paper 800 words physics III
Science is often attractive, science will never be explored, and it will always be fresh and interesting. For example, taking the floating egg experiment as an example, many people may know it, but the process of doing the experiment is far more novel than what I heard.
The experiment is simple. There are only four materials: big glass, salt, spoon and eggs. Simple as it is, you can get endless knowledge from it.
First, I picked up the kettle, poured half a glass of water into the cup, and then gently put the eggs into the water. After the egg sank to the bottom of the glass, it stopped moving and seemed to be resting.
Then I put 1 tablespoon of salt, and the eggs didn't move; I began to put the second spoonful of salt, and the eggs were still lying quietly at the bottom of the cup; I put down 6 spoonfuls of salt in a rage, and the eggs didn't live up to expectations and rose a little; Finally, I put 2 spoonfuls of salt, and the index of egg rise was higher.
I heard that other people's eggs can float in the middle of water, so I took them out, stirred the semi-finished salt water with a spoon and slowly put them in until the bottom of the cup was salted. At this time, the eggs kept floating up and down. I waited for a while, but the egg did not move and struggled to surface.
Finally, I poured the remaining 2 spoonfuls of salt into the water, and the eggs gradually surfaced. If I swim freely with a swimming ring, I will press the egg down with my naughty fingers and let go of my fingers, and the egg will soon float back to the water.
Why do eggs float? I got something from the computer: when an egg is just put into clean water, it will sink to the bottom because its specific gravity is greater than water and its buoyancy is less than its own weight; After salt is released, water dissolves the salt and the specific gravity of water increases. When the specific gravity of salt water is equal to that of eggs, eggs will float in the middle of water. Keep adding salt. When the specific gravity of salt water is greater than that of eggs, the eggs will float on the salt water and the top of the eggs will be exposed to the water.
The teacher told us in class that any object will be buoyed in water, and the buoyancy is equal to the weight of the volume of water boiled by the object. This is famous? Archimedes principle? Also known as the law of buoyancy. In fact, science and physics are similar when they grow up.
I was surprised that this little experiment contained so many theorems, which made me realize that science is of great significance to us besides relaxing and playing. I secretly made up my mind to study physics and study this interesting science in the future.
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