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如果真的有超能力:超级速度

If superpowers were real: Super speed - Joy Lin

一些超级英雄的移动速度比风还快
Some superheros can move faster than the wind.
1969年 当阿波罗10号飞船返回地球
The men in Apollo 10 reached
穿过地球大气层时
a record-breaking speed
宇航员们的速度达到
of around 25,000 miles per hour
破纪录的
when the shuttle re-entered
25000英里/小时
the Earth’s atmosphere in 1969.
如果我们也能移动那么快
Wouldn’t we save a lot of time
岂不是很节省时间?
to be able to move that fast?
但是会碰到什么呢?
But what’s the catch?
我们周围的空气并不是虚无的
Air is not empty.
它由氧气和氮气
Elements like oxygen and nitrogen,
甚至无数细小的灰尘
even countless dust particles,
共同组成
make up the air around us.
我们在空气中穿梭时
When we move past these things in the air,
实际上是和这些物质在摩擦
we’re rubbing against them
会产生很多的摩擦力
and creating a lot of friction,
这些摩擦的结果就是生热
which results in heat.
就像摩擦双手生热
Just like rubbing your hands together warms them up
或钻木取火的道理一样
or rubbing two sticks together makes fire,
摩擦的越快
the faster objects rub together,
产生的热量就越多
the more heat is generated.
因此 如果我们真以25000英里每小时的速度奔跑
So, if we’re running at 25,000 miles per hour,
与空气摩擦产生的热量就会把我们的脸烧化
the heat from friction would burn our faces off.
即使我们能承受住这样的热量
Even if we somehow withstood the heat,
但空气中的沙土
the sand and dirt in the air
仍会把我们刮花
would still scrape us up
在同一时间
with millions of tiny cuts
留给我们数百万的小切口
all happening at the same time.
见过卡车的保险杠或前格栅吗?
Ever seen the front bumper or grill of a truck?
你知道空中飞的鸟儿和虫子会对你
What do you think all the birds and bugs would do
睁开的眼睛和外露的皮肤产生什么作用吗
to your open eyes or exposed skin?
所以呢 你就会带上面具
Okay, so you’ll wear a mask
防止他们毁坏你的脸部
to avoid destroying your face.
但是横在你与你目的地之间
But what about people in buildings
的建筑物里面的人呢?
between you and your destination?
我们从眼睛看到并做出反应
It takes us approximately one-fifth of a second
需要大约1/5秒的时间
to react to what we see.
而当我们看清我们面前的物体
By the time we see what is ahead of us
并做出反应时
and react to it –
时间乘以速度等于距离
time times velocity equals distance
等于1/5秒
equals one-fifth of a second
乘以25000英里/小时
times 25,000 miles per hour
等于1.4英里
equals 1.4 miles
——1/5秒后我们已经经过
– we would have gone past it
或者已经超过了1英里
or through it by over a mile.
我们要么就是以这样超快
We’re either going to kill ourselves
的速度撞上离我们最近的墙而完成自杀
by crashing into the nearest wall at super speed
要么更糟糕的 假如我们是无坚不摧的
or, worse, if we’re indestructible,
是实际上把自己的身体变成了导弹
we’ve essentially turned our bodies into missiles
足以摧毁经过路上的任何物体
that destroy everything in our path.
因此以25000英里每小时的速度长距离飞行
So, long distance travel at 25,000 miles per hour
会让我们自燃
would leave us burning up,
虫子覆满身体
covered in bugs,
并且没有反应时间
and leaves no time to react.
那以这种超级速度
What about short bursts
飞至我们能看到的地点
to a location we can see
且中间没有障碍物 又会怎么样呢?
with no obstacles in between?
那好 假如一枚导弹
Okay, let’s say a bullet
正要击中一个美丽的受难少女
is about to hit a beautiful damsel in distress.
这时我们的英雄以超级速度出现
So, our hero swoops in at super speed,
英雄救美
grabs her,
拯救了她
and carries her to safety.
听起来很浪漫
That sounds very romantic,
但是在现实中 这位少女很可能要经受
but, in reality, that girl will probably suffer
来自救命恩人的比导弹更大的伤害
more damage from the hero than the bullet
如果他以超级速度带走她
if he moved her at super speed.
牛顿运动第一定律说明了物体具有惯性
Newton’s First Law of Motion deals with inertia,
证明物体在运动的过程中
which is the resistance to a change
是有阻力的
in its state of motion.
因此 物体会保持匀速运动状态
So, an object will continue moving
或静止状态
or staying at the same place
除非有外力作用改变这种匀速或静止状态
unless something changes it.
加速度是指速度随着时间变化的快慢
Acceleration is the rate the velocity changes over time.
当少女静止时
When the girl at rest,
其速度为零
velocity equals zero miles per hour,
然后却要在几秒之内
begins accelerating to reach the speed within seconds,
加速到25000英里每小时
velocity increases rapidly
加速度会急剧增长
to 25,000 miles per hour,
她的大脑会挤向头骨的一边
her brain would crash into the side of her skull.
而当脱离危险停下来之后
And, when she stops suddenly,
加速度又迅速地减为零
velocity decreases rapidly back to zero miles per hour,
她的大脑又会挤向头骨的另一边
her brain would crash into the other side of her skull,
这样一来她的大脑就成了一团浆糊
turning her brain into mush.
大脑很脆弱 突然移动会伤及其组织
The brain is too fragile to handle the sudden movement.
她身体的其他部位也会同样受损
So is every part of her body, for that matter.
记住并不是速度过快而导致损伤
Remember, it’s not the speed that causes the damage
因为阿波罗10号飞船的宇航员们都经历过那样的速度
because the astronauts survived Apollo 10,
而是加速度
it’s the acceleration
或是突然减速
or sudden stop
导致内部器官
that causes our internal organs
挤向身体内部的前面
to crash into the front of our bodies
就像搭公交时 司机一脚刹车
the way we move forward in a bus
我们就会前倾一样
when the driver slams on the brakes.
从数学上看 这位英雄对这位少女所做的
What the hero did to the girl
无异于带着她以最大速度
is mathematically the same as running her over
超过一架太空飞机
with a space shuttle at maximum speed.
她也许会在加速度的影响下立刻死掉
She probably died instantly at the point of impact.
这位英雄也就会欠这个可怜少女的家人一个道歉
He’s going to owe this poor girl’s family an apology
和一笔天价的赔偿金
and a big fat compensation check.
噢对了 还有可能要坐牢
Oh, and possibly face jail time.
医生必须带着责任保险单
Doctors have to carry liability insurance
以防失手伤害到自己的病人
just in case they make a mistake and hurt their patients.
我倒想知道 超级英雄的保险单值多少钱?
I wonder how much superhero insurance policy would cost.
好啦 哪个超级英雄物理课
Now, which superpower physics lesson
是你下一步想要探索的呢?
will you explore next?
改变体型和组成
Shifting body size and content,
超级速度
super speed,
飞行能力
flight,
超级力量
super strength,
永生
immortality,
还是
and
隐形能力?
invisibility.

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视频概述

如果有像超级英雄那样快的超级速度,会发生什么呢?岂不是更节省时间?

听录译者

收集自网络

翻译译者

海参崴

审核员

审核团1024

视频来源

https://www.youtube.com/watch?v=ryGR06dlPf0

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