## 字幕列表 影片播放

• Hey it's me Destin, welcome back to Smarter Every Day.

嗨！我是 Destin。歡迎收看《Smarter Every Day》（聰明每一天）！

• So today we're in the rocket van and I've got two little science helpers here right?

今天我們坐在大車裡，與我的兩位科學小幫手在一起，對不對？

• Kids: Yes, right.

孩子們：對！

• Are you wearing your seatbelts?

系好安全帶了嗎？

• Yes.

系好了。

• OK we're gonna do something pretty interesting. Check this out.

OK 接下來我們要做的很有意思。聽好了：

• I've got a pendulum suspended from the top of our family van

我從我們家車頂上懸掛了一個單擺

• and we're just gonna drive forward, we're gonna accelerate,

然後我們往前開，往前加速

• so if we're going that way, which direction do you think this pendulum should go? What do you think?

如果我們往那邊開，這個擺會往哪邊偏呢？你認為呢？

• 3.. 2.. 1.. Go.

三……二……一……開！

• Kids: Yes.

孩子們：好了！

• Which way is it going?

擺往哪邊偏了？

• Kids: My way.

孩子們：我這邊。

• That's right. It's because I'm accelerating right?

這就對了，是因為我在加速，對不對？

• Does that make sense to you guys?

這有沒有道理？

• Yes sir.

有道理！

• OK very good, I was hoping it would make sense.

OK 棒極了，我是希望這很明白的。

• So we're gonna change it up just a little bit.

好，現在我們來換它一換。

• OK so now what I'm gonna do is I'm gonna replace this pendulum with a balloon.

OK 現在我要做的是把這個擺換成氣球。

• We should see the same thing right? Let me cut this off.

我們應該看到同樣的結果，對吧？我來把這個繩子割斷。

• So what we're gonna do is we're gonna accelerate that way

好，我們現在要做的是向那邊加速。

• so we have the mass of the balloon and the acceleration that should net in a force and will have to react with this string right?

氣球有質量，由於加速度應該會產生一個力，作用在這根繩子上，對不對？

• You guys ready?

準備好了嗎？

• Yes sir.

準備好了！

• 3.. 2.. 1.. Go.

三……二……一……開！

• Wait a second. What just happened?

哎，等等！怎麼回事？

• What happens when I stop?

如果我停下呢？

• The balloon goes backwards when I stop.

我停下，氣球反而朝後跑！

• What's happening?

這是怎麼回事？

• 3.. 2.. 1..Go.

三……二……一……開！

• There it is. It's coming right at me.

看看，氣球直衝我來呢！

• Why's it doing that?

怎麼會這樣呢？

• Do you wanna know?

想知道嗎？

• Yeah.

想！

• Alright, I brought something to show you.

好的，我帶了樣東西給你們看。

• You remember I told you I was gonna bring this jar earlier? Remember that?

記得我說過要帶這個玻璃罐​​子嗎？記不記得？

• So it's like this. Imagine this entire van is just like this jar,

是這樣的。想像這整輛車就是這個罐子，

• and all the air inside this van is just like the water in the jar. Does that make sense?

車子裡的空氣就像罐子裡的水。明白嗎？

• So let's imagine that the balloon is this bubble on top,

現在想像氣球就是水里浮著的這個氣泡，

• because the helium in the balloon is lighter than air right?

因為氣球裡的氦氣要比空氣輕，對不對？

• So that causes it to do what?

所以這會讓氣球怎麼樣？

• Kids: Go up.

孩子們：浮起來。

• Go up, that's right.

浮起來，對了。

• So if I've got this air that's just like it, what happens if I move the jar that way?

那麼如果空氣跟​​這個一樣，我把罐子往那邊移會怎麼樣？

• All that water sloshes to the back.

所有的水會朝後涌。

• And when that water sloshes back this way, which direction does the bubble go?

那麼如果水往這邊涌，氣泡會往哪邊跑？

• You see that? So the air bubble moves in the direction of acceleration,

明白了嗎？氣泡朝加速度的方向移動，

• does that make sense?

有沒有道理？

• I know you're five but I think you can get this.

我知道你們才五歲，不過我想你們能明白。

• OK so I've got my seatbelt on. If I drive forward real fast right now which direction is the balloon gonna go?

OK 我系好安全帶了。如果我現在往前開得很快，氣球會往哪邊跑？

• Forward.

往前。

• Why will it go forward?

為什麼往前呢？

• Because all the air's sloshing back.

因為所有的空氣都往後涌了。

• That's right! Very good! Watch this.

對了！真棒！看好了。

• Look at that. You see that?

看哪，看到了嗎？

• So you know what that means don't you?

你們知道這意味著什麼，對不對？

• That means you have more air to breathe than daddy does when I'm going fast.

這意味著車開快時你們比爸爸有更多的空氣呼吸。

• Did you realise that?

意識到了這點了嗎？

• Kids: Nooo!

孩子們：沒有呢！

• Yeah that means when I go fast, that means more air sloshes back there to you and you have more oxygen to breathe.

對呀，這意味着車開快時，更多的空氣朝你們後邊涌去，所以你們有更多的氧氣來呼吸。

• Doesn't it feel good back there?

坐在後面的感覺很好吧？

• OK so now we have the plumb bob right next to the balloon, so if I go forward they should spread apart right?

OK 現在我們把鉛錘掛在氣球的旁邊，那麼如果我們往前開他們應該分開，對不對？

• Let's check it out.

我們試試看。

• Is it working?

是這樣嗎？

• Kids: Yeah.

孩子們：是！

• So what I want to do is I want to tell everybody on Smarter Every Day that if they go download

現在我要做的是告訴看《Smarter Every Day》的各位觀眾如果他們去下載

• a free audio book that it'll help Smarter Every Day by sponsoring us.

一部免費的有聲書就能夠通過贊助《Smarter Every Day》來幫助我們。

• Audible will, if they go to audible.com/smarter.

Audible 會贊助我們，如果他們訪問 audible.com/smarter。

• And so they get a free audio book, but I'm gonna do it in a funny way.

他們能得到一部免費的有聲書，不過我要搞笑一點。

• Now lean in towards me and look straight at the camera.

湊到我這來，眼睛看攝像機。

• I know you don't know what I'm gonna do but don't laugh

我知道你們不知道我要幹什麼，但是別笑

• because I want people to realize that they can send you to school if they get a audio book.

因為我要讓大家意識到下載有聲書可以幫助送你們去上大學。

• Does that make sense?

明白嗎？

• Yeah.

明白。

• So whatever happens don't laugh. OK?

不管發生什麼不要笑，好嗎？

• Look straight at the camera. Ready?

往攝像機裡看。預備——

• You don't know what I'm doing, do you?

你們不知道我要幹什麼吧？

• OK you ready?

OK 準備好了嗎？

• (High pitched helium voice) Thank you for supporting Smarter Every Day and if you would please download an audio book at audible.com/smarter.

（氦氣高音聲）感謝您支持《Smarter Every Day》！在此拜託您到 audible.com/smarter 下載一部有聲書。

• Did you know daddy could talk like this?

你們不知道爸爸還會這樣講話吧？

• No.

不知道。

• You didn't know that happened, did you?

你們不知道這是怎麼回事吧？

• So if you go get a free audio book it'll support Smarter Every Day and it'll help me send these kids to school.

對，如果您去下載一部免費的有聲書就能夠支持《Smarter Every Day》並且幫助我送孩子們上大學。

• Does that sound like a good idea?

聽上去是個好主意吧？

• Yes.

是的。

• You should never do that, by the way. That's only for adults.

你們可千萬別學我這麼幹。只有大人才行。

• How'd you do that?

你怎麼做到的呀？

• It's magical. Anyway I'm Destin, you're getting Smarter Every Day.

魔術嘛！我是 Destin，您剛剛收看的是《Smarter Every Day》。

• Please subscribe to Smarter Every Day and support our sponsor audible,

敬請訂閱《Smarter Every Day》，還有支持贊助我們的聲音。

• I'll leave a link somewhere and you can check it out.

我會在某處留個鏈接，方便您點擊。

• Thanks, bye.

多謝了，再見！

• How'd you change your voice?

你怎麼會變聲音的呀？

• OK now we have the sunroof, the side window and the back open.

OK 現在我們打開了天窗，側窗和後蓋。

• I'm gonna go forward, where do you think it's gonna go?

我現在往前開，你們覺得氣球會往哪邊跑？

• Daughter: Forward.

女兒：前面。

• Son: Backwards.

兒子：後面。

• 3.. 2.. 1..

三……二……一……

• Dad: So this is air, not helium?

父親：這是空氣，不是氦氣吧？

• Yes sir.

是的，父親。

• OK I think it's gonna act like the pendulum.

OK 我覺得它會像那個擺一樣。

• Dad: 3.. 2.. 1.. Go.

父親：三……二……一……開！

• (laughs) Backwards.

（笑）掛成倒擋了！

• Oh it does. We're gonna use that one.

哦，果真如此，我們就用這次錄的吧。

Hey it's me Destin, welcome back to Smarter Every Day.

B1 中級 中文 氣球 空氣 加速 氣泡 贊助 下載

# 物理教學 慣性定理 (A Baffling Balloon Behavior - Smarter Every Day 113)

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黃翊丞 發佈於 2014 年 05 月 11 日