Edison is a famous British scientist. Edison studied very hard when he was a child. Once, Edison's mother was ill for several days and asked Edison to go to the vegetable market to sell vegetables. Edison didn't go to school for his mother's health and went to the market to sell vegetables, so he thought, "I'll take some books to read, so I can kill two birds with one stone." When he went to the vegetable market, he read books while selling vegetables. He only concentrates on reading books, not selling vegetables. In any case, no matter how much money is paid, others can take these vegetables at will. Another time, Edison made a light bulb. He searched many places before finding a filament. He sells newspapers on the train and buys materials for production. Once he accidentally knocked over two bottles of chemicals while doing an experiment on the train and caught fire. He was knocked down by the conductor and threw his chemicals down. So, he went to a small shack to be an experimental room. He worked day and night for several days, and the electric light experiment finally succeeded. Edison studied so hard that he became a famous British scientist. I want to learn from Peter's love and study of science since childhood and become a scientist when I grow up.

newton

Isaac newton, the greatest scientist in the 0/7th century, is one of the few scientific giants in human history. His contributions to physics, mathematics and astronomy are epoch-making.

1642 65438+On February 25th, Newton was born in Thorpe, urs, a small village in England. He was so weak at birth that he almost died. Newton lost his father in his early years and lived with his mother. 166 1 year entered Trinity College of Cambridge University.

From 1665 to 1667, Newton was already thinking about gravity. One night, he was sitting under an apple tree to enjoy the cool, and an apple fell from the tree. It suddenly occurred to him: Why do apples only fall to the ground and not fly to the sky? He analyzed the three laws of Copernicus' Heliocentrism and Kepler, and then thought: Why do planets go around the sun without leaving? Why are planets fast when they are near the sun and slow when they are far away from the sun? The farther the planet is from the sun, why does it run longer? Newton believed that their fundamental reason was that the sun was very attractive.

After a series of experiments, observations and calculations, Newton found that the gravity of the sun is closely related to its huge mass. Newton further revealed the universal law of the universe: all objects are attractive; The greater the quality, the greater the attraction; The greater the spacing, the less attractive it is. This is the famous "law of gravity" in classical mechanics.

According to Newton's discovery, we can determine the mass of the sun and planets, determine the rules for calculating the orbit of comets, explain the ocean tides on the earth caused by the gravity of the moon and the sun, and deduce the minimum speeds needed to overcome the gravity of the earth, fly to the solar system and fly out of the solar system, which are 7.9 kilometers per second, 1 1.2 kilometers and 16.6 kilometers, respectively, and are named first and second. Newton not only verified the previous achievements, but also provided an accurate and authoritative scientific basis for the minimum thrust or lower speed limit of future spacecraft.

Newton wrote down his life's achievements in the book Natural Philosophy and Mathematical Principles. He discovered the three laws of motion of objects and founded calculus mathematics. Later, when talking about his achievements, he said, "If I see farther than others, it is because I stand on the shoulders of giants."

1727 In the early morning of March 20th, Newton died after a long illness. It is said that when life is about to stop, his mood is open and calm. The inscription written for him by the English poet Pope said: "Nature and its laws are hidden in the night; The emperor said,' Let Newton be born', which made everything bright.