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。