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  • Blocko: Hey there, welcome to Life Noggin.

  • Zhooom Zhooom!

  • Those were cars

  • As a…

  • Car sounds.

  • Imagine what would happen if you went speeding through a wall.

  • You're probably thinking: Ow.

  • But not all barriers are made of brick.

  • Humans have been breaking through the sound barrier for decades, but what exactly does

  • that mean?

  • And how does that affect your body?

  • Well, when a plane approaches the speed of sound it encounters an invisible wall of resistance.

  • This is known as the sound barrier and it occurs when molecules in the air become powerfully

  • compressed at the nose.

  • Breaking through this barrier at the speed of sound, or supersonic speeds, may sound

  • terribly exhilarating, but inside a modern jet, the ride is smooth and barely noticeable.

  • Not even the sonic boom, created from the rapid change in pressure, can be heard from

  • within.

  • Still, that doesn't mean there aren't risks.

  • While supersonic speeds aren't enough to kill humans on their own, rapid acceleration

  • certainly is.

  • As a pilot picks up speed, their body becomes pummelled by an accelerative pressure called

  • a g-force.

  • At their worst, these forces can cause broken bones and burst blood vessels.

  • But perhaps the most dangerous situation is when a g-force drives a pilot's blood down

  • into their feet and away from their brains, causing loss of vision, loss of consciousness

  • or even death.

  • Today, pilots wear oxygen masks to breathe with anti G-suits around their legs to stop

  • blood from pooling there.

  • They are also taught to special breathing techniques to keep their lungs full and muscle

  • squeezing exercises to keep blood in their brains.

  • But here's thing: it's not just pilots that can do this.

  • Exactly sixty-five years after the first aircraft achieved this feat, Felix Baumgartner became

  • the first human to do the same with only his body.

  • After seven years of careful preparation, the ex-military parachutist began a free fall

  • from the edge of space, that would not only break eight world records, but the sound barrier

  • itself, reaching a top speed that was 75 mph faster than the speed of sound.

  • At this velocity, scientists worried about internal injury from passing sound waves or

  • the sound barrier itself.

  • Unlike modern aircrafts, humans aren't designed for supersonic travel, and without the safety

  • of a pressurised, wind-protected vehicle, no one knew what would happen.

  • 24 miles above Earth, where Felix started, temperatures are low enough to cause hypothermia.

  • That's why Felix's airtight suit and helmet were so important, because if even one crack

  • appeared, he would have died instantly.

  • One of the scariest moments in the fall was when Felix entered a flat spin.

  • This is when the body rotates out of control, sometimes reaching 120 revolutions per minute

  • and creating up to 22 times the force of gravity.

  • When this happens to a free-falling human, blood is pushed into the head and feet, potentially

  • causing burst eyeballs, mental confusion, loss of vision, consciousness, and even death.

  • Luckily, Felix was able to right himself and land safely on the ground, taking a big step

  • for humankind.

  • What's more, in the half a minute Felix spent at supersonic speeds, he felt and heard

  • absolutely nothing unusual.

  • So even though his fall came with a whole host of hazards, it turns out, breaking the

  • sound barrier wasn't one of them.

  • Still, unless you have extensive training and all the right equipment, it's probably

  • safest to stick to normal speeds and leave the supersonic business with daredevil animations

  • like me and Triangle Bob.

  • Are you ready?

  • Ok, let's do this.

  • GGiooong, giooong!!!

  • Biioong, Biiiiioooong!!!!!!

  • We're going so fast Triangle Bob!

  • Biiiiioooong!!!!!!

  • So do you have any questions that you really want to be made into a video?

  • Let me know now in the comment section below, we're taking suggestions for future episodes.

  • Curious to know what would happen in your body if you spent 24 hours on a plane?

  • Check out this video!

  • As always my name is Blocko!

  • This has been Life Noggin!

  • Don't forget to keep on Zhoomin Zhoomin!!!

  • Keep

  • Keep on thinking.

Blocko: Hey there, welcome to Life Noggin.

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音速を体で壊したら? (What If You Break The Speed Of Sound With Your Body?)

  • 52 1
    傅亮智 に公開 2021 年 01 月 14 日
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