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DENJIRO: Let me demonstrate a spectacular phenomenon using this stone. I'll pour some water on it. When I bring a flame up to the stone... It caught fire! If I pour water on it to extinguish it... The fire doesn't die down. What seems like a piece of stone, is actually a substance called calcium carbide, also known as carbide. Calcium carbide, when combined with water, forms acetylene gas, a type of flammable gas. That is why when we added water, it burned even more.
Now, let's create calcium carbide. It is a compound created by using calcium oxide and bits of charcoal. If you are trying to make a small portion of it, you can use an electric arc. Let me pour water on it and bring a flame up to it. It's burning. This is proof that I was able to successfully create calcium carbide.
NARRATOR: Acetylene gas, which comes from calcium carbide, is used in carbide lamps and welding.
DENJIRO: Acetylene gas is also used to scare away birds. Here, I have special party poppers. We put in a mixture of air and acetylene gas in the aluminum cans. There are paper cups placed on top as covers. There's a small hole at the bottom of the can for lighting it on fire. Let's spin this around and bring a flame up to the cans.
Acetylene gas, when mixed with air, creates the sound of an explosion.
I hope energy will bring you all happiness. Our magic word is "Happy Energy!"