ADM-201 dump PMP dumps pdf SSCP exam materials CBAP exam sample questions

绕地球的环? – 译学馆
未登录,请登录后再发表信息
最新评论 (0)
播放视频

绕地球的环?

Ring AROUND the Earth?

I recently received this question via email.
最近有人通过邮件问了我一个问题
Hello, there! Imagine we build a giant ring around the whole globe,
你好!假设我们在地球周围建造了一个
perfectly round, no ups and downs.
位置不变的正圆形环
What you didn’t know is that I installed explosives
你不知道
all around on each pole holding it up,
我在每个支撑它的柱子上都装了炸药
and then boom.
然后轰地一声爆炸
All the poles break at the same time.
所有的柱子同时破裂
What will happen to the ring?
这个圆环会怎么样呢?
Will it just sit there in the air?
它会就这样呆在空中不动吗?
Or will it fall down?
或者它会坠落?
Will it start spinning like crazy?
还是会开始疯狂地旋转?
Best regards, Martin from Sweden.
祝你一切安好 马丁 来自瑞典
First off, Martin,
首先 马丁
I cannot condone secretly installing explosives on poles holding up infrastructure projects.
在重要的公共设施上偷装炸药不能忍
Second, I have a feeling you might
第二 我有种感觉
really like the planet Saturn.
你可能很喜欢土星
And Third, that’s a great question!
接着第三 这真是个有趣的问题
The answer depends a lot on how strong the ring is,
这个结果很大程度上取决于这个环有多坚固
but in general you’ve touched upon
但总的来说 你已经提到
an idea called symmetry breaking.
一个被称作对称性破坏的概念
As you’ve realized, a perfectly symmetric ring
你也意识到 一个完整的对称环
doesn’t have any particular reason
没有特殊理由
to fall or break in any one point!
在任意一点坠落或破裂
Like a perfectly balanced pencil, which way will it fall?
就像一个极其平衡的铅笔 它会落向何处呢?
Anyway, if the ring is really really strong
无论如何 如果这个环是真的非常坚固
then it should just stay exactly where it is
那么它应该正好在它所在之处
“hovering”, though that actually means
“悬浮” 着 尽管实际上意味着
being held up by its own strength,
被自己的力量支撑着
because each part will be gravitationally pulled toward the center of the earth.
因为每个部分都被地心引力牵向地球中心
And since those forces
而由于那些力量
are spread equally around the ring in a symmetric way
以一种对称的方式被平均传递给整个圆环
they’ll cancel out.
它们就抵消了
Like how in tug of war if both sides pull the same amount
就像在拔河中 如果两边势均力敌
the rope won’t move.
绳子不会移动
Now, if the ring’s not sufficiently strong,
现在 如果绳子不够结实
it might buckle in places and become scrunched up,
它各部分会被拧着然后缩紧
like the coins that my friend Dianna shrunk
就像我朋友黛安娜把硬币
by putting them in a very strong, very quickly
放在一个非常强 变化很快的磁场中
changing magnetic field.
硬币就缩小了
It’s interesting to note that the properties of circumferences
值得注意的是周长的特点
mean you’d only have to
这意味着你只能
take out a few meters for the ring to be
去除圆环的几米让它足够小
small enough to just lie on the ground.
小到只够刚刚好附在地面上
As for “will it start spinning like crazy”?
至于“它会开始疯狂地旋转吗?”
I think you might be referring to the idea
我想你可能指的是这个想法
that the earth is spinning to the east underneath the ring
地球在环内向东转
more underneath all of us right now.
更大程度上 这个圆环在我们下面
Actually, I have a whole other video about that
事实上 我另有一期的相关的视频
which you should definitely check out.
你绝对不容错过
Thanks again for your question, and please stay away from the high explosives.
再次感谢你的问题 也请远离烈性炸药
Hey, this is Henry. And this video was supported in part by Squarespace
嗨 我是Henry 本期视频由方形空间部分赞助
which I just recently used to turn minute physics.com
我最近把分钟物理这个网址
into a nice little landing page
变成一个小巧的登录页面
with answers to frequently asked questions
对一些频繁被像你这样的的人
from people like you.
提出的问题
And a minute physics logo made many of these characters.
而且分钟物理的标志由这些元素组成
Squarespace pride themselves on their websites
方形空间将他们放在网页上
being well designed automatically functional devices
精巧的网页由功能设备自动设计
and super easy to set up.
同时建立起来超级简单
And that was definitely the case here.
这就是现在的情况
I don’t know why I put this off so long,
我不知道为什么我将简介说的这么长
but it’s good now.
但现在我说完了
So if you’ve got a new or old project that needs a home on the internet,
所以如果你有新的或者以前的项目想要放在网上
you can get ten percent off your first order
登录squarespace.com/minutephysics
by going to Squarespace.com slash minute physics.
首次下单可以打九折
and using the code minute physics
结账时请记得出示代码
at checkout to let them know you came from here.
以便于让他们知道你是由这个视频邀请而来

发表评论

译制信息
视频概述

如果地球外有一个圆环,炸掉支撑它的柱子,会发生什么呢?几分钟带你了解物理知识。

听录译者

收集自网络

翻译译者

ZElanlan

审核员

审核员CR

视频来源

https://www.youtube.com/watch?v=4xSPlQUejd8

相关推荐