Name: 伯努利原理 (Bernoulli's Principle)
Uploaded: 2025-08-26T11:06:31.000Z
Duration: 3 min 5 s

2 bowling balls separated by a leaf blower.

With the use of Bernoulli's principle, we turn these ordinary objects into fascinating physics lab equipment.

利用伯努利原理，我們把這些普通物體變成了迷人的物理實驗設備。

Bernoulli's principle tells us that a high speed stream of air results in a low pressure.

伯努利原理告訴我們，高速氣流會導致低壓。

If our demonstrator creates high wind by aiming their leaf blower over the end of this toilet paper roll, they will create a low pressure above the paper resulting in an uplifting force.

如果我們的演示者將吹葉機對準這卷衛生紙的末端製造大風，就會在衛生紙上方產生低壓，從而產生一股上浮力。

We even decided to have some surprise fun with the freshman at Texas A&M.

我們甚至決定和德州農工大學的新生們一起玩一些驚喜。

And who says that serious science can't also be silly?

誰說嚴肅的科學不能是愚蠢的？

What if I told you that a hair dryer can be used to make a ping pong ball float in mid air?

如果我告訴你，吹風機可以讓乒乓球浮在半空中，你會怎麼想？

The wind from the hair dryer is actually creating a column of high speed air all around the ping pong ball.

吹風機吹出的風實際上是在乒乓球周圍形成了一個高速氣柱。

As we learned before, high speed means low pressure.

正如我們以前學到的，高速意味著低壓。

This difference in pressure creates a force that keeps the ball stuck in the column of air, even if we change the angle.

即使我們改變角度，這種壓力差也會產生一種力，使球停留在氣柱中。

Although, at larger angles our hair dryer just isn't strong enough.

不過，在角度較大的情況下，我們的吹風機不夠強勁。

We can even add more ping pong balls into our column of air.

我們甚至可以在空氣柱中加入更多的乒乓球。

You may be thinking that this works because the ping pong balls are so light, so let's do a little more testing.

你可能會想，這是因為乒乓球太輕了，所以才行得通。

It's not heavy, but it's much heavier than the ping pong balls.

As you might have guessed, the hair dryer just can't produce enough wind to hold up the blue rubber ball, so let's try our giant hair dryer.

你可能已經猜到了，吹風機無法產生足夠的風力來吹起藍色橡膠球，所以讓我們試試我們的巨型吹風機吧。

As you can see, Bernoulli's principle still works on a larger scale.

正如您所看到的，伯努利原理在更大的範圍內仍然有效。

The much stronger column of air holds up our much heavier ball, and even at a steeper angle.

強大得多的氣柱能托起重得多的球，甚至能以更陡的角度托起球。

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伯努利原理 (Bernoulli's Principle)

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fascinating

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