Áp suất trong chai - Thí nghiệm cùng Bé - Be Lab

Put the water in this bottle Right? Now prepare another tray for the water Here is a needle Now I will poke it I will try to poke it Can you guess if the water will come out? Will it form a line? Let's try it The water is coming out See? It hasn't come out yet Will the water come out? Let me help you What is this? The water is just a little After a little, the water is almost gone It's just a little If it's a full bottle, it will be like this I'm holding it See? The water is not coming out See? There is no water Do you want more? One more Hold it Don't hold it See? If I hold it here, it won't work If I hold it on the neck of the bottle, it won't work The water won't come out Right? Now I will try to open the bottle Let's observe Turn it over Don't open it The water is coming out Close it Close the lid Close it Wow The water is not coming out I will add 2 more holes 4 holes I have to adjust it If I see water coming out, I have to close it Keep doing it 4 bottles Do you see the water coming out? Let me explain When I close the bottle, the water won't come out When I open the bottle, the water will come out Because of the pressure It's simple Normally When I close the bottle, the water will come out But it won't If the water comes out The water level in the bottle will decrease If the water level in the bottle decreases The water level in the bottle will decrease When I open the bottle The air will fill the bottle And pushing the water out Through the holes And when I close the bottle The air won't go in The water will not go out If I fill the bottle The more water fasten The bigger the bottle The stronger the water This is because the water is running out, right? There's only half a bottle left, so it's not very strong. But at first, I saw that the water level was very high. Now, I'm going to get some water in this bottle. Okay. There. I'm going to get a little bit of water. Okay. Here, get some water. Let's try it. I'm going to put my hand on it. Oh. Ta-da. Here, tilt it. Oh. Here, tilt it. Don't be afraid. Tilt it. Oh. Here, be careful. Oh. There's a piece of clear beer down here. Clear beer. Right? Clear beer. Wait a minute. For example, I'll get some water here. Get some water, okay? Okay. Then I'll put the piece of clear beer here. There, put the piece of clear beer here. Then I'll tilt it. That's right, the piece of clear beer will keep the water from spilling out. There, right? There. There's still water, right? Now, how do I get the piece of clear beer out? Look at me. Let go of this finger. Look at this little finger. Let go of this little finger. There. Because... Here, I have a hole up here. When I want to let the water fall, I have to hold this hole tight. So that the air can't get in. If the air can't get in, the water will always stay in here. Right? When the air can't get in, there's a piece of clear beer here. Then the water can't fall. There, when I let go of my hand, there's a way for the air to get in. If I shake it, the water will fall.