What did Franklin find?

Question 1: Benjamin, what scientific inventions and discoveries did Franklin make? Franklin (1706 65438+ 10/7-65438+April 1790) is a famous American politician and scientist.

Franklin had done many electrical experiments and invented lightning rods, bifocal glasses, frog shoes and so on. He has studied meteorology, geology, acoustics and ocean navigation and made many achievements.

Question 2: What did you find from Franklin's observation and reasoning that revealed the secret of thunderstorm? What is the answer of scientific research? Observation experiment.

Franklin, an American scientist, conducted a kite experiment in thunderstorm, which revealed the secret of thunderstorm, praised Franklin's scientific attitude of daring to explore and experiment, and explained that only through careful observation, research and experiment can the mystery of nature be revealed.

Question 3: Benjamin, what did Franklin achieve? Franklin? His achievement is simple:

1. Politics: drafted the Declaration of Independence and the Constitution of the United States, and actively advocated the abolition of slavery; The first American ambassador abroad (France); Promulgated the news dissemination law.

2, the contribution of science, electrostatics (first put forward the theory of current, invented the electrostatic generator and lightning rod, and the idea of using kites to attract lightning was also put forward by this person); Mathematics (created magic squares of 8 times and 16 times); Heating (improved heating stove); Optics (bifocal glasses invented for the elderly); Invented rocking chair, lightning rod and improved street lamp; Draw a storm map first; Discover the harmfulness of human exhaled gas; Explain the northern lights first; The father of modern dentists; Found the cause of the cold; Invented granular fertilizer.

The whole "BT"

3. In education, the first American scholar and philosopher; The first hospital was built for Philadelphia and later developed into Philadelphia College of the University of Pennsylvania.

4. Enterprise: Set up its own printing factory and publish the Pennsylvania Newspaper, the first newspaper in Philadelphia. Printing local money in Philadelphia.

Finally, there is the head of $ 100, one of the currencies that people all over the world like.

Question 4: What did Franklin prove? Reprinted: Benjamin Franklin (1706- 1790), American scientist, inventor, politician and social activist. He first named the positive and negative charges; Put forward a single fluid theory; Put forward the principle of charge conservation; Did the famous Philadelphia kite experiment, unified the sky electricity and the earth electricity; Invented the lightning rod.

Franklin was born in Boston, Massachusetts, USA on1June 706+1July1October. His parents are both British immigrants who make candles and soap for a living. At the age of eight, Franklin was sent to school with excellent academic performance. However, due to his large number of brothers and sisters (* *10, ranking eighth), his parents' income is not much and his life is very poor. /kloc-dropped out of school at the age of 0/0 and never went to school again.

Although Franklin left school, he never gave up the opportunity to learn knowledge and became a knowledgeable person through hard self-study. Franklin worked in his father's candle soap shop for two years. He does heavy work all day, such as cutting candle cores, filling candle molds, making soap, looking after shops and doing odd jobs as a broker. However, no matter how tired you are, you should seize the time to study by yourself after work, read most of your father's books and spend all your money on them. Seeing that he likes books so much, his father sent Franklin as an apprentice to his brother, who is the owner of the printing factory. Franklin, who was only 12 years old, signed a contract with his brother to learn printing technology until he was 2 1 year old. During the nine-year apprenticeship, except for accommodation and clothes, there is no other remuneration, and only the minimum wage for ordinary workers in the last year can be obtained.

Franklin mastered certain printing technology in a short time and became his brother's right-hand man. At that time, he met the apprentices of Geometry Bookstore and some book collectors, so he borrowed books from others at night, read them all night and returned them early the next morning. People know that he can borrow books quickly, and he loves books very much. Everyone likes lending books to him. The books he read are very miscellaneous, ranging from political papers, literary reviews and essays to arithmetic, geometry and English grammar. /kloc-began to practice writing at the age of 0/4 and published many articles in newspapers.

1723, 17-year-old Franklin couldn't stand his brother's constant criticism and deliberate finding fault. He went to Philadelphia alone to make a living and became a formal printer in a printing factory. The next year, he traveled across the ocean to London and made some celebrities.

Franklin returned to Philadelphia at the invitation of a friend and returned to his old job. Later, in his autobiography, he made a brief summary of his life in London: "I lived in London for about 65,438+08 months, and I worked hard most of the time. Except watching movies and reading books, I spent little time on myself ... I met some smart people, and I benefited a lot from talking with them and read a lot of books." 」

1727, Franklin and several friends jointly founded a youth organization-"Join the Society" to help ordinary people learn by themselves. This activity has aroused great interest among young people, and young people in other cities have also established similar organizations, which have existed for almost 40 years. A few years later, Franklin founded his own newspaper-Pennsylvania newspaper. He carefully arranged and personally wrote articles, which were very popular and beautifully printed, and soon established a good image among readers. This newspaper not only greatly improved his personal reputation, but also brought him considerable profits.

1733, Franklin began to learn foreign languages. He studied French, Italian and Spanish successively, which is of great benefit to his future scientific research and diplomatic activities.

1743, he founded the first American scientific group "North American Society for Promoting Useful Knowledge by Philosophy" in Philadelphia, and later this philosophical society developed into one of the earliest universities in the United States-the University of Pennsylvania.

From 65438 to 0746, Franklin, 40, became interested in scientific research. He dabbled in a wide range, involving meteorology, biology, geology, chemistry, agriculture, mathematics and other fields, and achieved many results. Of course, the greatest achievement is made in the study of electricity. He concluded that there are positive and negative charges, which are represented by "+"and "-"respectively. His great discovery laid a solid foundation for the quantitative study of charge properties.

1788, French scientist Coulomb discovered the famous Coulomb law of charge interaction, which is based on this concept. Franklin further suggested that charge cannot be created.