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I wanna show you how to take what we learned about the power of air and apply it to a classic science experiment called ?The Egg In A Bottle.?
This is an old-fashioned milk bottle. Now you don?t have to use one of these, you could very easily find a bottle that has a similar opening. You?re just trying to find a bottle where a shelled, hard boiled egg won?t slip into the opening. That?s gonna be really important. Alright, so the question is how do you get the egg into the bottle?
If we were to heat the air in this bottle, those molecules that are close together now are gonna move far away from each other and start to escape from the bottle. Then after they escape from the bottle, if I could seal the bottle with the egg forming a one-way valve we an allow the outside air pressure to push on the egg as the air here starts to cool and as the air cools the molecules come back together again, means the pressure on the outside is greater than the pressure inside. Let?s see if that hypothesis holds true.
I got my eggs. They?re shelled. I put a little water on the eggs to kinda help out. I got a piece of paper that we?re gonna light on fire. I got my safety glasses and I?ve got the striker. Okay, so here we go. Strip of paper is on fire. This goes down into the bottle and that starts to burn. Now the egg goes on top like this. We?re going to.. BAM! I couldn?t even finish and it is inside.
You?re eyes were not playing tricks on you. Take a look again in slowmo. You could see now that the fire went out as soon as the fire went out those molecules started to come back together again. The outside presses pushed on the egg and that?s The Egg In A Bottle.
I know what you?re asking. Could you get the egg out of the bottle? So let?s reverse engineer what we just did. If I could make the pressure on the inside of the bottle greater than the pressure on the outside of the bottle, well I could shoot the egg out and probably into my mouth because that?s the way I?m gonna create the pressure. So, look at what we have here. I positioned the egg so that there?s a seal here at the bottom. I?m gonna push air in and hopefully the air can?t come back out until the air pressure is great enough to pop the egg right back out. Alright here we go.
Anything for DIY Sci.
Here it comes. Here it is. There it is. See? It?s starting to come out. It?s gonna pop out and? BAM! And the egg?s out of the bottle.
Steve Spangler demonstrates the egg in a bottle experiment. This is an excerpt from DIY Sci.
For full instructions to this experiment: https://www.xplorationstation.com/stories/This-is-The-Classic-Egg-in-a-Bottle-Trick
To watch this episode of DIY Sci: https://xplorationstation.vhx.tv/diy-sci/season:1/videos/101-pressure-episode-export
For the full collection of DIY Sci: https://xplorationstation.vhx.tv/products/diy-sci-the-entire-collection
For season 1 of DIY Sci: https://xplorationstation.vhx.tv/products/diy-sci-season-1
For Season 2 of DIY Sci: https://xplorationstation.vhx.tv/products/diy-sci-season-2