Filling a Long Bag With One Breath Using Bernoulli's Principle

I wonder how many breaths it would take me to fill up this incredibly long plastic bag. Do you think there's any way I can fill this whole thing up with one breath?

I bet you I can. Stay tuned to the end to see the real answer, but let me show you the standard way of filling this up. We'll take our breaths.

One hardly did anything.

There's ten. I'm not even halfway there, and I'm ready to pass out.

Is there perhaps a better way to do this?

Let's see. Let me take all the air out of the...

And now we're gonna use something called Bernoulli's principle.

We're gonna blow into the bag, but we're not gonna put our mouth right on the bag.

And what happens there is as we blow in, surrounding air is pulled in as well to the low pressure area.

This is Bernoulli's principle. Firefighters know about this. We'll talk about that in a moment.

So here we go, one big breath.

Filled up the whole tube. So I said firefighters use this too.

If you ever wanna get the air out of your room, maybe it's, uh, hot at night and it's the summer, and you don't have an air conditioner, so you're using a fan, don't put the fan right in the window.

Back the fan up just a little bit, and now it'll blow air out, but will also pull the surrounding air out with it.