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I don't believe in the truth of a stupid bird.

As a science student, when I saw this topic, I immediately petrified.

I really want to smoke people! I really want to slap the proposition teacher a slap - on behalf of my physics teacher.

Let a bird fly to the Pacific Ocean with a branch - what kind of best IQ can make such a story?

I don't know how the protagonist's bird is how might it be. The thinking of a normal person makes me have to doubt something. I don't care about you, a bird with a branch, how to flirt with his companions;

I don't care about you, a bird that can't swim, how to fish on the branches; don't care about it, the waves in the Pacific will not overturn the branches. I only ask you a question:

You know, how big a branch can make a bird float on the water?

As thick as wire? Is the chopsticks as thick?

Looking for a proposition teacher, please allow me to teach you a formula about buoyancy. If you want a piece of wood to carry a bird, you need to meet the following conditions:

The buoyancy generated by wood - the gravity of the wood itself + the gravity of the bird

In order to make the wood work the most, we assume that the wood is just completely stepped below the surface of the water.

Then you can draw the conclusion that:

Density of water × volume of wood × gravity acceleration = density of wood × volume of wood × gravity acceleration + mass of bird × gravity acceleration

Combine similar items and simplify them to:

Volume of wood × {density of water - density of wood} = weight of birds

The density of water is about 1000 kg/m3, and the density of wood is between 400-750 kg/m3. We have the right and when this bird is very smart, we have found a lighter one. The density of wood is 500 kg/m3. Count.

Can be derived:

Bird weight / wood volume = 500 kg / cubic meter

Simply put, this is the conclusion:

If the bird is 1 kilogram, then the volume of wood = 1 / 500 cubic meters = 0. 002 cubic meters = 2 cubic centimeters

What is the concept of 2 cubic decimeters? - Our common bricks, about two! ! !

What is the concept of a one kilogram bird? Let's just say that ordinary hens are usually three or four pounds, and one kilogram is heavy, that is, only small chicks.

A bird of the size of a chicken, can you move two brick-sized pieces of wood or a wooden rod with a thick arm? Even if it is possible, the wind's resistance to the wood will allow the birds to fly to the Atlantic instead of the Pacific.

The proposition teacher may say that his bird is big, and the bird is heavy! It may not be a thick wooden stick, but a pillar.

In short, science tells me. No matter what the bird is, it will not choose to fly the Pacific Ocean with branches. If you must do this, it must be a stupid bird - a stupid bird drowning in the Pacific Ocean to feed fish. For the stupid bird reason built on this stupid bird story, only the stupid bird will believe.

Fourth grade: 沄 double smog