DENJIRO: Let's perform an experiment using this balloon today. We’ve lined up these spikes used for fixing flowers. Let's drop an apple on them. Naturally, the spikes pierce through the apple. What will happen if we place a balloon the spikes?
BOY: It would pop.
DENJIRO: As you can see, even if you press the balloon down...
BOY: The balloon doesn't pop!
DENJIRO: Nothing special has been done to the balloon. To prove this, if I poke the balloon with a needle...
Why don’t the spikes pop the balloon when a needle easily pops it? When you poke the balloon with one needle, the force gets concentrated at the tip of the single needle. A hole is made in the balloon, and it pops. Meanwhile, the spikes have many needles fixed at the same height. This is crucial. When you press the balloon against the spikes, the force gets dispersed across many needles. What if we use sand paper?
BOY: Sand paper wouldn't pop the balloon.
DENJIRO: Let's see what happens.
BOY: It popped!
DENJIRO: Mysterious, isn't it? The reason becomes clear when we zoom in and look at the surface of the sand paper. It looks like it's covered with many small, pointy rocks. Sand paper is covered with small, sharp rocks in order to polish things. These sharp rocks damage the balloon surface and make it pop.
Let's try using this large balloon. Pressing it against the spikes won't make it pop. What if we do the same with sand paper? As we've seen, the balloon surprisingly doesn't pop when pressed against spikes, but easily pops on sand paper.
I hope energy will bring you all happiness. Our magic word is "Happy Energy!"
Негізгі бет Will It Pop? The Mystery of Balloons / Mr. Denjiro's Happy Energy!
No video
Пікірлер: 34