How to weigh an elephant 100 years ago, how to weigh an elephant?

The use of water buoyancy to weigh the elephant, from Cao Chong to weigh the elephant.

When Cao Chong was five or six years old, his knowledge and judgment skills were like those of an adult. Once, Sun Quan.

A giant elephant was sent, Cao Cao.

He wanted to know the weight of the elephant and asked his subordinates about it, but none of them could tell how to weigh it.

Cao Chong said: "Put the elephant on the big boat, mark the place where the water surface reaches, and then let the boat load other things, weigh these things, and then you can know by comparison." Cao Cao was very happy to hear this, and immediately did so.

The method of how to call an elephant is the best, and here's how:

Trimming a large ship that can withstand the weight of an elephant.

Place the boat in the river or sea, and then secure the boat to the river or sea to prevent the boat from drifting away.

The elephant is herded into the boat, observed and recorded how deep the hull is submerged in the water.

Take the elephant off the boat and put it back in the elephant garden.

Take a large amount of stones or pieces of lead of regular weight and load them into the boat, knowing that the position of the hull in the water is the same as the position of the elephant's hull in the water.

Remove the lead from the stone and weigh it to the weight of the elephant.

The story of "Cao Cong Calls the Elephant" was learned when we were very young, and the people of ancient times had such wisdom at such a young age, which made us really envious. But the reason why this method is suitable for ancient times is because there were no such heavy scales to measure elephants, and in modern times, there are special scales to measure elephants, so it is simpler than the original method.

Method 1: Use a large electronic weighbridge.

Method 2: Use the principle of leverage.

Let the elephants. Standing at one end and a person at the other end, when the weight of the person and the elephant is the same, and then adding the weight of the person to calculate the weight of the elephant.

Method 3: Place the elephant with a steel cable.

Tie it up, use the pulley of the crane, tie a large basket to the other end of the steel cable, and put a weight in the basket, and when the weight is equal, it will be balanced.

The method is as follows: 1. Use a large electronic weighbridge.

2. Make an elephant warping board, use the principle of levers, let the elephant stand at one end, and stand on the other end, and when the weight of the person and the elephant is the same, and then add the weight of the person to calculate the weight of the elephant.

3. Tie the elephant with a steel cable, use the pulley of the crane to tie a large basket at the other end of the steel cable, and put a heavy object in the basket, when the weight is equal, it will be balanced.

4. Suspension method: hang a strong enough pulley on a big tree, tie the elephant at one end, hang a large basket at the other end, put stones in the basket until the elephant is lifted, weigh the stones.

Note. In addition to Cao Chong's method, make a large seesaw, lead the elephant up, and put a stone (or other) on the other end, the seesaw is roughly balanced, and the weight of the stone is the weight of the elephant. Cao Chong called the elephant.

It is a miracle that Cao Chong, who was only six years old, used the physical principle that the gravity of an object floating on the water is equal to the buoyancy of the water on the object, and solved a big problem that even many learned adults were unable to solve.

In addition to Cao Chong's method, the following methods can also be adopted: make a large seesaw, lead the elephant up, and put a stone (or other) on the other end, the seesaw is roughly balanced, and the weight of the stone is the weight of the elephant.

Take two hot air balloons, drive the elephant into it, load the stone on the other one, release it, if two are the same, take it down, weigh the stone.

You can understand it by looking at the story of Cao Chong's elephant.

Once, Sun Quan of Wu gave Cao Cao an elephant, and Cao Cao was very happy. On the day the elephant was transported to Xuchang, Cao Cao led the civil and military officials and his youngest son Cao Chong to see it together. [3] None of Cao Cao's people had ever seen an elephant.

There are two types of direct and indirect substitution.