DENJIRO: I have a hose here. I’m going to swing the hose really fast and bring the other end up to these foam balls.
ON-SCREEN TEXT: The foam balls are getting sucked in!
DENJIRO: Spinning the hose causes centrifugal force, and the air inside the hose gets pushed out. This leads to a drop in pressure, and that’s why the balls got sucked in. This experiment shows how a certain household appliance works. A vacuum cleaner. Let’s see how it sucks in trash.
You’ve probably never seen what it looks like inside a vacuum cleaner, but here it is. It sucks in air using this centrifugal fan. I’ve taken it out of the vacuum. Air gets sucked in through the hole in the center. Here’s what it looks like when I take the cover off. Let’s observe the flow of air using these tiny foam balls. You can see that the balls are getting blown outward. The fan is spinning clockwise. Air goes in through the center and flows outward due to centrifugal force. The air then gets expelled through the openings.
Let me perform an experiment to show you how powerful the suction of a vacuum is. I’ve attached a pipe to a vacuum. I’m going to put this tube inside the pipe. I’m going to close this opening here with my hand, and he will cover the opening on the other side. Now, let’s turn on the vacuum. Watch what happens when I let go.
ON-SCREEN TEXT: Happy Energy!
DENJIRO: The tube shot out of the pipe. When both sides of the pipe were closed, the pressure inside dropped due to the vacuum’s suction. When I let go, the tube flew out because it was pushed out by atmospheric pressure.
I hope energy will bring you all happiness. Our magic word is "Happy Energy!"
15 окт 2024
