Name: 小学校で間違って教えられた5つのこと｜まとめ (5 Things You Were Taught Wrong in Elementary School | Compilation)
Uploaded: 2021-01-14T10:38:31.000Z
Duration: 20 min 37 s
Description: VoiceTubeの動画で発音を聞きながら英語表現を覚えよう！学べる英語：

We're not here to rag on science teachers.

Their jobs are very difficult, and they're making the world so much better by doing that.

And when science gets blown out of proportion or oversimplified, it's almost never their fault.

Now that said, thanks to miss leading articles, oversimplified books or plain old misunderstandings.

Sometimes you walk out of elementary school with a few misconceptions about the world, ones that stick around for the rest of your life.

And we've debunked many of these over the years.

The first time you learned about astronauts on the International space station, you might have heard that they're weightless because there's no gravity of, and from their perspective, they definitely feel weightless.

Here's a very old video from Hank with more, we spend our lives stuck to this planet.

The best of us can jump on astounding two meters off the ground.

The record for a land animal is the tiger with a vertical leap of Bailey double that is some serious force.

Dragon is down into this thing and we don't usually think about it because we're always under its spell our entire lives.

Unless, of course, we get to space because everyone knows that space has no gravity.

In fact, you may have seen a number of YouTube videos that have set you straight on this topic.

Space is packed wall to wall with gravity.

Without gravity, everything would just shoot off in straight lines.

That would be no Galaxies or solar systems.

Planets in the universe would be a supremely boring place.

So let's talk real quick about how gravity works.

His equation was figured out by Sir Isaac Newton, and he used it to do all sorts of awesome stuff.

There are three variables in this equation.

The mass of two objects say the Earth and the moon and the distance between them.

There's also a constant the gravitational constant which didn't just worked out by observation.

So, according to this equation, the gravitational force between two objects is dependent upon the massive both of the objects and the distance between them.

The masses are divided by the distance, so as the distance increases the force decrease.

At 370 kilometers above the earth, the height of the space station, there is still plenty of gravity.

Indeed, without that gravity, it would just fly off into deep space.

The space station is in orbit, stuck there by the earth's gravity.

That sounds weird because they're safe, mean relatively.

They're not as safe as I am, but they aren't about to crash into the earth.

That's because they are falling at the speed of gravity while moving horizontally enough to continually miss the Earth instead of plummeting toward the earth, they're plummeting around it.

And just like when in a plane, you don't feel like you're moving 400 miles per hour.

The astronauts have already done all of their acceleration and are at a constant speed, so to them it feels like they're weightless and motionless.

There only frame of reference is inside of the spacecraft.

The same sensation can be experienced without being in space by getting in a plane, having the plane dropped toward the earth at the same acceleration of gravity.

It looks to all the world like you're floating in the plane because the fuselage is your frame of reference.

But really you're crashing toward the earth.

A terrible feeds slain and everything inside all the objects and people.

Everything is falling toward the earth at the same rate.

So the contents of the plane appeared to float because gravity is acting on all the objects equally.

No matter what we do to that distance number, no matter how big how far apart things are, it always exists.

That means that every object in the universe is constantly attracting every other object in the universe.

If you're sitting there motionless, you're not floating, you are falling, and eventually you will fall into that planet.

It may take longer than the life of the universe, but you will eventually fall into the planet Man.

Since 2013 Sideshow has grown a lot now, and your first science classes, you may have started learning about physics.

While you probably didn't get too far into the weeds, there's a good chance you at least saw this diagram of an atom.

It's a really popular symbol, and it would be easy to think that's what Adam's look like.

It turns out that atoms are a lot more complicated than that, but I'll let Olivia explain.

Have you ever looked carefully at the intro for this show?

If you have, you might have noticed that there's a diagram of an atom with little electrons orbiting the nucleus.

Over the years, scientists have come up with a different atomic models based on what we know about how they work.

The atomic model that's in the sideshow intro was one of them, and it has a lot of history behind it.

But the most accurate atomic models are a little more complicated because Adam's are complicated.

By the start of the 20th century, scientists knew that atoms were made up of negatively charged electrons, plus some sort of positive charge.

The tricky part was figuring out how these charges fit together.

The running theory was that the electrons were embedded in a positive sphere, which was called the plum pudding model, because it looked like a traditional Christmas pudding.

But that all changed around 1911 when a scientist named Ernest Rutherford, along with his team at Manchester University, published the results of the famous gold foil experiment.

Rutherford and his colleagues fired Alfa particles, which are positively charged at thin gold foil.

According to the plum pudding model, the Alfa particles should have just passed straight through the foil because Adams would be mostly empty space, with some charges scattered around.

And Adams are mostly empty space, so most of the alfa particles did pass straight through the foil.

But to Rutherford surprise, some Alfa particles were deflected by a lot.

He concluded that an Adam's positive charge was concentrated in a tiny central nucleus, and these nuclei were deflecting alfa particles that bounced off of thumb.

He also predicted that the electrons were orbiting around the nucleus.

I kind of like how planets orbit the sun.

That's why this model is sometimes called the planetary model.

Rutherford was right about protons being in the middle with electrons around them, and you'll still see his model used today to explain the very basics of the Adam.

It's the one in the sideshow intro, but there was one major problem with the planetary model.

It predicted that orbiting electrons would lose energy in the form of radiation, which would make them spiral inward and eventually crash into the nucleus.

This implied that all Adams would eventually collapse, but we know that stable atoms do exist, so there had to be something missing.

Just two years later, in 1913 Danish scientist Neil's Bohr proposed an adjustment to the Rutherford model that solved this problem.

Bores Model predicted that electrons orbit at very specific energy levels, which he called orbits.

The electrons could only orbit at precisely those levels, and so they couldn't spiral inwards, and electron could switch levels if it absorbed or released some energy.

But on Lee, specific, discreet levels were allowed and electrons couldn't go below the lowest level.

That explained why stable Adams didn't just collapse.

Boers model quickly became the most popular model oven.

Adam and it's often used today to show the basic way that an Adam is arranged.