It’s easy to move out of the compound piston
More than 100 years ago, there was a young man named Humphrey Potter in England who was hired by others to guard a steam engine. His job was to release the steam whenever the lever of the steam engine was lowered. The child was active by nature and could not sit beside a machine for a long time, so he stared at the steam engine and started thinking. Later, Porter finally found a way. He installed a few wires and some bolts on the machine so that the valve could open and close automatically. In this way, not only could he get away and have a good time, but he also doubled the efficiency of the steam engine. In this way, Porter discovered the principle of warped piston.
Snooze out of the barbed wire fence
A long time ago, there was a boy named Jeffers White in the United States who herded sheep for a farmer. He had to drive the sheep to pasture for grazing every day and ensure that they were not allowed to cross the surrounding wire fence to eat vegetables in the adjacent vegetable garden. One morning, with pleasant weather and gentle breeze, White fell asleep unknowingly in the pasture. Suddenly, a burst of angry curses woke him up. When he opened his eyes, he saw the farmer was furious at him: "Damn guy! The sheep have trampled the vegetable garden into a mess, but you are sleeping here comfortably! "The little shepherd boy knew he was wrong and kept his head down without saying a word. Since this incident, White has been wondering, how can a wire fence be used to trap 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 wire and cut them into 5 centimeters. Long pieces are then tied to the wire around the pasture to serve as "thorns". After the project was completed, the sheep still managed to get over the wire fence and eat vegetables from the garden, as they had in the past. However, the "thorns" on the wire fence stung them unbearably. After experiencing the pain many times, the sheep became obedient and never tried to cross the wire fence again. Half a year later, Jeffers White applied for a patent, and subsequently, this barbed wire fence was widely used around the world.
Complaints against "little boy" perfume
A few years ago, a 9-year-old American boy, Brendon Clark, sprayed his father on himself in order to attend a classmate's party. of perfume. However, this move was criticized. Neighbors complained to Clark's mother, saying that the fragrance on her son was too strong and could not be tolerated by minors. In fact, all the perfumes on the market at that time were for adults. Clark was so angry that he decided to develop a perfume suitable for boys. So he found all available materials including detergents, children's soap and essential oils. With the help of his mother and a chemist, a perfume was finally made. The scent is light and fresh air, and Clark happily named it "Little Boy" fragrance. After four years of hard work, Clark formed "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 favored by teenage customers and has been a best-seller.
Gluttony creates the "Mpemba Effect"
One day in the summer of 1963, a Tanzanian middle school student named Mpemba added sugar to milk and wanted to make A portion of your favorite ice cream. At that time, several classmates were also preparing to make this delicious ice cream. He thought that if he waited until his hot milk had cooled down before putting it in the refrigerator, other students would have already occupied the refrigerator. In order to occupy a seat, Mpemba put the cup with hot milk in the refrigerator first. Unexpectedly, his hot milk froze much faster than other people's cold milk. However, his classmates and teachers at the time were very disapproving of this discovery, and some even used it as a joke. Faced with everyone's ridicule, Mpemba did not give up easily. He came to the University of Dar es Salaam and asked Dr. Os Bonnell, professor of physics. The expert conducted the same experiment and the results were exactly the same, proving that this natural phenomenon does exist objectively. This discovery aroused the interest of many scientists around the world and was later called the "Mpemba effect."
Skating out of earmuffs
On Christmas 1937, Green Wood got a pair of long-awaited skates. He was so happy that he even forgot to put on his fur hat, so he came to the ice of the nearby river and slid happily.
But after a few minutes, his ears were unbearably cold, and he was sweating profusely when he put on the hat. What to do? So with the guidance and help of his mother, he made a pair of earmuffs by himself. Although the earmuffs were crudely made, they were functional, and Green was delighted. As a result, friends who learned the news 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.
Play with telescopes
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 a bond with glasses. To solve the problem, I often play with my glasses.
One day, the naughty eldest son was playing with a steel pipe and installed a concave lens and a convex lens at both ends of the steel pipe. Then I used it to read a book, and found that the densely packed characters became larger and clearer. When the younger brother saw that his older brother was watching with gusto, he immediately grabbed the steel pipe 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, very clear. The brothers were quite curious and told their father Jason about it. 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 scientific telescope developed by the famous scientist Galileo Galilei.
Simple method for multiplying numbers
There is a story that although the American girl Gloria is only 10 years old, she is very smart. One day, when she was studying the multiplier table, she discovered a simple algorithm for multiplying each number by 5: the result of multiplying an even number by 5 is to fold the even number in half and then add "0", and the result of multiplying the odd number by 5 is to subtract "0" from the odd number. 1" then fold in half and add "5". For example, 8×5, 8 is an even number, it becomes 4 after being folded in half, and 0 is added after it, the result is 40; 7×5, 7 is an odd number, it is reduced by 1 to become 6, 6 is 3 when folded in half, and 5 is added after 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.