There are scientists and their experiments in junior high school science

Newton's slide experiment on the inclined plane, the experiment and reasoning obtained Newton's first law of motion;

Ohm's law, which derives the relationship between current and resistance and voltage by controlling variables;

Joule's law, through the kerosene in the flask, the resistance wire, and the sliding rheostat form a series circuit to obtain the relationship between the heat generated by the resistance and the resistance;

the Torricelli experiment, measuring the value of atmospheric pressure (76 cm Hg) with a mercury tank and a glass tube closed at one end;

Archimedes' principle, which measures the buoyancy of an object immersed in a liquid by means of a spring scale; Archimedes also discovered the principle of the lever;

In the Oster experiment, the small magnetic needle is placed under a wire through which an electric current is passed, and the small magnetic needle will be deflected, and it is concluded that there is a magnetic field around the current;

Faraday, when a part of the conductor of a closed circuit cuts magnetic inductance lines in a magnetic field, an induced current is generated, that is, the phenomenon of electromagnetic induction, according to this principle, the later generator was invented;

Galileo's single pendulum experiment, which concluded that its period was only related to the length of the pendulum, invented the later pendulum clock;

In the Magdeburg hemisphere experiment, sixteen horses were used to pull apart the two hemispheres that were attached to each other, and it was concluded that the atmospheric pressure was very large;

The pressure inside Pascal's liquid, through the piezometer, shows that there is pressure inside the liquid, and it is related to the density and depth of the liquid, at the same depth, the pressure is equal in all directions.

In the history of science, it was Rogier Bacon who first proposed the idea of repentance in experimental science.

Rogier Bacon (1214–1294) was an English philosopher and scientist.

Rogier Bacon was a pioneer of modern experimental science. He actively advocated and engaged in scientific experiments. From the belief that observation and experimentation are the only way to gain true knowledge.

Advocating that observation and experimentation are the only ways to obtain true knowledge, his scientific research has a naïve materialism. Color.

If you don't live under the rocks, you will definitely understand racism and the concept of one group being superior to another.

Even 50 years ago, Jane Elliot recognized it and decided to experiment with it. He named it the "Blue Eyes Brown Eyes Experiment."

When her third-graders arrived at school on a fateful morning, she began to divide them into two categories: those with blue eyes and those with brown or green eyes. The real difference between the two groups is that children with blue eyes have less melanin than children with brown eyes, which affects the color of the eyes and the color of **.

The experiment came true on its own. The children began to believe in him and acted differently: the blue-eyed child had low self-esteem, while the brown-eyed child had low self-esteem.

Brown-eyed children dominate the playground, and blue-eyed children run into corners in embarrassment. Even Elliot (blue-eyed) has brown-eyed girls conspiring against her.

Elliott was fascinated by her results and soon switched roles during the experiment. She found that while the blue-eyed kids were the new alpha, they weren't as cruel as the original brown-eyed kids, perhaps because they remembered how they were discriminated against.

Eliot's creative experiments reveal a truth about human nature that we are naïve, and if we could discriminate against a group to improve our ego, we would. This horrible ** shown to his children taught them racism and had long-term effects.

Personally, the most chilling part is that the experiment is still notorious to this day.

Joule-Joule, a brilliant British physicist. Joule has been engaged in experimental research all his life, and has made outstanding contributions to electromagnetism, heat, and the theory of molecular motion of gasesHertz, a German physicist, was born in Hamburg. Hertz's greatest contribution to mankind was experimentally confirming the existence of electromagnetic waves, Huygens-Dutch physicist, mathematician, and astronomer.

Galileo Galilei was a famous Italian mathematician, astronomer, physicist, and philosopher, and was the first scientific giant to integrate the three sciences of mathematics, astronomy, and physics on the basis of scientific experiments. Galileo was a pioneer of the scientific revolution, and throughout his life he proved and widely publicized the new worldview pioneered by Copernicus and Kepler. Faraday-English physicist, chemist, and well-known self-taught scientist.

Faraday was mainly engaged in the research of electricity, magnetism, magnetooptics, and electrochemistry, and made a series of major discoveries in these fields, and was the founder of electromagnetic field theory, Einstein-German physicist, and the winner of the Nobel Prize in Physics in 1921. His scientific achievements mainly include four areas: early research on Brownian motion; the creation of the special theory of relativity; advancing the development of quantum mechanics; The establishment of the general theory of relativity opened the way for the study of cosmology Descartes, March 13, 1596, in the city of Touran on the Hillettany Peninsula in western France.

Descartes was the first to realize that the law of inertia is the key to solving mechanical problems, and was the first to establish the law of inertia as a principle. Coulomb - French engineer and physicist. Brewster - Scottish physicist, mainly engaged in the study of optics, Bell ** inventor, was born in Edinburgh, Scotland in 1847.