It’s easy to move out of the compound piston
More than 100 years ago, a young man named Humphrey Potter in England was hired by others to guard a steam engine. His task Every time the control lever of the steam engine is lowered, the steam is released. The child is active by nature and cannot sit beside a machine for a long time boringly, so he stares at the steam engine and starts thinking.
Later , Porter finally found a way. He installed a few wires and some bolts on the machine so that the valve could automatically open and close. In this way, he could not only get away and have fun, but also improve the efficiency of the steam engine. 1 times. In this way, Porter discovered the principle of warp and compound piston.
Snooze and sleep out of barbed wire
A long time ago, there was a man named Jeffers White in the United States. A boy herds sheep for a farmer. Every day he has to drive the sheep to the pasture for grazing, and he must ensure that they are not allowed to cross the surrounding wire fence to eat vegetables in the adjacent vegetable garden.
One morning, the weather was pleasant and the breeze was gentle. White fell asleep unknowingly in the pasture. Suddenly, he was awakened by a burst of curses. When he opened his eyes, he saw the farmer was furious at him: "Damn it! The sheep have trampled the vegetable garden into a mess. , and you are sleeping here comfortably!" The little shepherd boy knew that he was wrong and lowered his head without saying a word.
Since this incident, White has been thinking about how to make the wire Where is the fence to enclose the sheep? He remembered that there were roses growing on the west side of the pasture, but the sheep never went there. It turned out that they were afraid of the thorns on the roses. The little shepherd boy happily patted his thigh and said to himself: "There is a way. Just add some thorns to the wire to block the sheep!"
So he got some wires, cut them into 5 cm long pieces, and then tied them around The wire surrounding the pasture was "thorned". After the completion, the sheep still tried to cross the wire fence and eat vegetables in the vegetable garden as they had done in the past. However, the "thorns" on the wire fence caused them unbearable pain, and they suffered many times. After that, the sheep became obedient and never tried to cross the wire fence again.
Half a year later, Jeffers White applied for a patent, and then this barbed wire fence became popular all over the world. is widely used.
Complaints against "little boy" perfume
A few years ago, Brendan Clark, an American boy who was only 9 years old, went to a classmate's party to attend a classmate's party. He sprayed his father's perfume on his body. However, this was criticized. Neighbors complained to Clark's mother, saying that the fragrance on her son was too strong for minors. In fact, all the perfumes on the market at that time were It is for adults.
Clark was determined to develop a perfume suitable for boys. So he found all available materials including detergents, children's soaps and essential oils. After his mother With the help of a chemist, a perfume was finally made. The perfume has a light fragrance, like fresh air. Clark happily named it "Little Boy" perfume.
After 4 After years of hard work, Clark established the "Brenden Company". After applying for a patent, he sold his product to a large retail company in the United States. Since its launch on the market, the "Little Boy" perfume has been very popular among teenage customers. It has always been popular and has been selling well.
Gluttony creates the "Mpemba effect"
One day in the summer of 1963, a Tanzanian middle school student named Mpemba He added sugar to milk to make his favorite ice cream.
At that time, several classmates were also preparing to make this kind of delicious ice cream. He thought that if he waited until his hot milk cooled, After that, he put it in the refrigerator. At that time, other students had already occupied the refrigerator. In order to occupy a seat, Mpemba rushed to put the cup with hot milk into the refrigerator. Unexpectedly, he and others Compared with the cold milk, his hot milk froze much faster. However, his classmates and teachers at the time were very disapproving of this discovery, and some even made it a joke.
Despite everyone's ridicule, Mpemba did not give up easily. He came
The University of Dar es Salaam asked Dr. Os Bonnell, professor of physics, for advice. This expert conducted the same experiment and the results were exactly the same, proving that this natural phenomenon does exist objectively. This discovery attracted many scientists around the world. This interest was later called the "Mpemba effect".
Skating out of earmuffs
On Christmas Day 1937, Green Wood got a pair of long-awaited earmuffs. He was so happy that he even forgot to put on his leather hat, so he came to the ice of a nearby river and skated happily. However, after a few minutes, his ears were unbearably cold, and it felt too hot to put on the hat. He was sweating profusely. What should he do? So with the guidance and help of his mother, he made a pair of earmuffs by himself. Although the earmuffs were rough in workmanship, they were very practical. Green was very happy. As a result, he learned this News friends came to him for help. From then on, Green started making ear protectors with his mother and grandmother, applied for a patent, and set up a factory. Later, he became a millionaire.
Make a telescope while playing
At the end of the 16th century, there was an optician named Janssen in the Netherlands. Perhaps due to family influence, his two sons also formed an indissoluble bond with glasses. I often play with my glasses.
One day, my naughty eldest son was playing with a steel pipe and installed a concave lens and a convex lens on both ends of the steel pipe. Then he used it to read a book, and found that the densely packed characters changed. It was big and clear. When the younger brother saw that his older brother was looking at it with great interest, the younger brother immediately snatched the steel pipe over and used it to look into the distance. He found that the scenery in the distance seemed to be pulled into front of his eyes and was very clear. The brothers were quite curious and took this He told his father Jason about the incident. Jason tried to use a steel pipe to look into the distance, and found that it was true as the children said, so he started to build a telescope. Later, this telescope became the basis for the famous scientist Galileo to develop a scientific telescope.< /p>
A simple way to multiply numbers
There is a story that although the American girl Gloria was only 10 years old, she was very smart. One day, when she was studying the multiplier table, she discovered various A simple algorithm for multiplying a number by 5: The result of multiplying an even number by 5 is to fold the even number in half and add "0", and the result of multiplying an odd number by 5 is to subtract "1" from the odd number, then fold in half and add "5". For example, 8× 5 and 8 are even numbers, and when folded in half, they become 4, followed by 0, and the result is 40; 7×5, 7 is an odd number, reduced by 1, and become 6, and when 6 is folded in half, it becomes 3, and after adding 5 to 3, the result is 35. Because this algorithm is simple and practical, it has been promoted to schools in the United States and widely adopted.