1666 or so, Newton had considered the problem of gravity when he lived in his hometown. During holidays, he often sits in the garden for a while. Once, as it happened many times before, an apple fell from the tree.
The accidental landing of an apple is a turning point in the history of human thought, which enlightens Newton's mind sitting in the garden and also causes him to think deeply: What is the reason why all objects are almost always attracted by the center of the earth? Newton mused. Finally, he discovered the gravity which is of epoch-making significance to mankind.
2. Archimedes takes a bath
Once Xilong II made a gold crown, but he always suspected that the goldsmith had stolen his gold and mixed it with silver in Wang Guanzhong. So he asked Archimedes to identify it, provided that the crown was not damaged. At that time, people didn't know that different substances had different proportions. Archimedes thought hard for many days, and there was no good way.
One day, he went to take a bath. Hardly had he got into the tub filled with warm water when the water overflowed and he felt his body floating slightly. So it suddenly occurred to him that the same weight of objects, due to different volumes, discharged water is also different. He stopped taking a bath, jumped out of the bathtub and ran home from the street naked.
When his servant came home panting, Archimedes was already doing experiments; He put the crown in a basin full of water, measured the overflowing water, and put the same weight of pure gold in the basin full of water, but the overflowing water was less than before, so he concluded that the goldsmith had mixed silver in Wang Guanzhong. From this, he discovered the principle of buoyancy.
The Wright brothers invented the airplane.
At Christmas, the Wright brothers' father brought them a butterfly toy. Dad told them that this is a flying spiral that can fly very high in the air. From then on, in their young hearts, things that can fly high in the blue sky will be created in the future. This wish has been affecting them.
The Wright brothers not only tried to master the previous research results, but also paid great attention to learning directly from the living flying objects-birds. They often lie on their backs, carefully observe eagles flying in the air for hours, and study and think about the mechanism of their take-off, lifting and hovering.
The miracle happened in 1903 12 17. This morning, the Kitty Hawk in North Carolina was still sleeping. The cold wind blows hard, and a strange guy with huge wings stops quietly on the empty beach. This is the first plane in human history-"Voyager One".
Watt improved the steam engine.
When Watt went to menstruation's house when he was a child, he found inspiration when he saw boiling water making the lid of the kettle keep jumping, but he was often stopped by his grandmother. After repeated experiments, he finally invented an improved steam engine when he grew up.
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5. A nail
Charlie wants to fight Richmond to the death. Charlie asked a man to nail his horse's paw. When the blacksmith got the fourth paw, he needed two nails to nail the fourth paw, so he secretly perfunctory. Soon, Charlie and the other party were in flames. In the war, a horse's paw suddenly fell off and the king was thrown to the ground by a war horse. Henry caught Charlie.
So there are "two nails missing, one horseshoe missing, one horseshoe missing, one war horse missing, one war horse missing, one battle missing and one country missing." Statement. The mistake of 1% led to the failure of 100%, and a huge dynasty was destroyed.
6, the embankment of a thousand miles, destroyed by the ant nest
Since 1970s, there have been 13 breakwaters and 9 dams in Qingyuan, Guangdong. It has been proved that 9 dams and 5 dams are the result of soil termites.
1In July, 986, Meizhou City, Guangdong Province suffered a severe flood since the founding of the People's Republic of China. There are 62 dikes in Meijiang, 55 of which are gaps caused by soil termites. In September, there were 198 18 gaps in the dike section of Yang Mo, Yangjiang City, Guangdong Province, among which 6 gaps were caused by soil termites.
7. Rare gas
Swedish chemist Scheler used to be an apprentice in a pharmacy. Because of his tenacious learning spirit and hard study, he discovered many gases and synthesized many organic substances.
When British chemists Rayleigh and Ramsey measured the gas density, they found that the nitrogen density produced by ammonium nitrite was different from that obtained by air separation, but the difference was only a few milligrams. Others are easily overlooked, but they carefully analyzed and studied, further separated and measured, and finally found rare gases.
8. Substitute parts
On July 24th, 2000, an Air France Concorde plane caught fire and crashed shortly after taking off at Charles de Gaulle Airport on the outskirts of Paris, killing 1 13 people. Subsequently, all Concorde planes owned by Air France and British Airways were grounded and inspected.
Further investigation shows that the metal pieces falling on the runway are not the original parts of DC 10 aircraft, but the replacement parts of the aircraft engine during maintenance.
9. subway benefits
Shanghai Metro 1 Line was designed by Germans, and it seems nothing special. It was not until Line 2 designed by China designer was put into operation that it was discovered that so many details were ignored in the original Line 2. As a result, the operating cost of Line 2 is much higher than that of Line 1, and it has not yet reached breakeven.
10, a piece of paper
Ford is a man. After graduating from college, he applied for a job in a car company. Three or four people who applied with him have higher academic qualifications than him. After the previous interviews, he felt hopeless.
But when it comes, it is safe. He knocked on the door and walked into the chairman's office. As soon as he entered the office, he found a piece of paper on the floor at the door. He bent down to pick it up and found it was a piece of colored paper, so he threw it into the wastebasket. Then he went to the chairman's desk and said, "I'm here to apply for Ford."
The chairman said, "Very good, very good! Mr. Ford, you have been employed by us. " Ford said in surprise, "Madam President, I think the first few are better than me. How did you hire me? " The chairman said, "Mr. Ford, the first three people are indeed more educated and handsome than you, but their eyes can only see big things, but they can't see small things."
Your eyes can see small things. I think people who can see small things will naturally see big things in the future. A person who only sees big things will ignore many small things. He won't succeed. That's why I hired you. "