-
Anonymous users2024-02-13People who can move the planet.
Ancient Greece had a very famous great mathematician, Archimedes. One day, he said to the king, "If you give me a place to stand, I will move the earth forward." ”
Hahaha! You're not bragging, how can you be! The king laughed and said, "Push something to me first, and let me see if what you say is true." ”
At that time, the king built a very large ship, but tried many ways to push it into the water, but all failed. In the end, they gathered the whole city and pushed it together, but they couldn't push it. Then the king said to Archimedes, "
Well, please help push that big boat into the water, my braggart! ”
Archimedes agreed. He carefully prepared and designed a machine made of a complex combination of levers and pulleys, leaving a long drawstring at the end of the machine. Then Archimedes invited the king to come and see the performance.
On this day, the beach was full of onlookers, and it was really crowded. The big ship was more than a dozen feet long and several stories high. People saw that it was indeed a side object, how could Archimedes move it?
Archimedes is really crazy. But Archimedes handed the little rope to the king, and said very confidently, "Please pull it, and everything will be settled."
The king was skeptical, and looked at it first, but still took the rope in his hand, and then pulled it gently. Suddenly, a miracle happened: the ship moved, slowly and slowly slid into the sea, as if a magician had done a magic trick.
The king's eyes widened in disbelief, and he opened his mouth in surprise for a long time before he said, "This, what's going on, could it be that God is helping you?" ”
Sucking stones.
In an ancient battle, a general and his soldiers were passing through a valley when they felt the "stones" on both sides of the valley pulling them, and the soldiers were "sucked away" by the stones. The general looked at the "stones" and then at the iron armor on the soldiers, and understood why.
He immediately gave an order for his soldiers to take off their armor and put on rhinoceros armor. Then he swaggered towards the enemy, and when the enemy saw such boldness of the other party, he rushed up. The general and his soldiers quickly hid behind the "stones", and the enemy began to shoot arrows at them, but the arrows ran towards the "stones" and did not reach the target.
The general and his soldiers defeated each other when the enemy was exhausted.
What is the reason for this? Later, the general told his soldiers the truth, it turned out that those "stones" contained a large number of magnets, and the arrows shot were sucked away by those "stones", and the soldiers were of course sucked away because of the iron armor they were wearing.
-
Anonymous users2024-02-12Write directly in it"The story of science"You can find a lot of them, try them! :
-
Anonymous users2024-02-11Once upon a time there was a man named Luban, who was an inventor.
Once, in order to build a palace for the king, he led his apprentices to cut down large trees. A few days passed, and the apprentices were so tired that their backs and arms hurt, but there were few trees that had been cut down.
Luban was in a hurry, he was walking on the steep mountain road, and when he was about to fall, he grabbed a pile of thatch, and when he looked, his hand was cut by thatch. He carefully measured the thatch, and he found that the leaves of this pile of thatch had many thin, small tines. He called a blacksmith and made a long, thin strip in the shape of thatch leaves.
Take a thin strip to cut down a big tree, and it is really fast and effortless. Lu Ban said, "Let's call it a saw."
Lavoisier was forced to work in French taxation for the purpose of raising funds for science, and died young because of the hatred of tax collectors in the French Republic.
Newton: It was during the holidays, and Newton used to come to his mother's house and sit in the garden for a while. Once, as had happened many times before, an apple fell from a tree. >>>More
The conditions for the formation of fog are cooling and humidification, which increases the water vapor content. This is formed by radiative cooling, which mostly occurs at night and early in the morning when it is clear, breezy, and the water vapor near the surface is relatively abundant and stable, or there is a temperature inversion, which is called radiation fog in meteorology; the other is the fog formed by the horizontal movement of warm and humid air, passing through the cold ground or water surface, and gradually cooling, which is called advection fog in meteorology; Sometimes fog formed by both causes is called mixed fog. It can be seen that those who have these conditions are in late autumn and early winter, especially in the morning of late autumn and early winter. >>>More
Small electronic balance model, note that this is a model, and it can only weigh very light objects, such as two small scraps of paper. The materials needed for the production are: a wooden board (preferably a little thinner, not too large), a washer, a paper clip, an awl, an electric soldering iron, several wires, two light-emitting diodes, a battery. >>>More
Extraction code: v6dp Hangzhou urban districts of the small promotion of junior high school bridging test materials 2014 Hangzhou Xiacheng District junior high school freshman quality unified test answer analysis. pdf 2014 Hangzhou Xiacheng District Freshman Quality Unified Test. >>>More