Book 25, Question 115 · Video
Why do aluminum cans jump off a belt at the recycling plant?
At a recycling plant, items ride along a conveyor belt. Giant magnets lift out steel cans, but aluminum is not magnetic. So the plant uses a fast-spinning magnet at the end of the belt. It creates swirling electric currents inside each aluminum can, and those currents make the can act like a magnet that is pushed away. The cans leap forward into their own bin, while paper and glass fall straight down.
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What Crafty Clover says in this video
Intro
Hi there, curious minds! I'm Crafty Clover! Let's discover something amazing. Why do aluminum cans jump off a belt at the recycling plant?
The Big Idea
At a recycling plant, aluminum cans jump right off the belt! Is it magic? No, it's science!
Conveyor
Step one: Conveyor. At a recycling plant, items ride along a conveyor belt. Machines sort them.
Magnets
Step two: Magnets. Giant magnets lift out steel cans. But aluminum is not magnetic.
Spinning Magnet
Step three: Spinning Magnet. A fast-spinning magnet at the end of the belt creates swirling electric currents inside each aluminum can, making it act like a magnet that is pushed away. The cans leap forward into their own bin, while paper and glass fall straight down.
A Closer Look
Let's take a closer look! Magnets grab steel. Spinning magnets push. Aluminum leaps. Paper falls down.
Quick Facts
Quick facts! This trick is called an eddy current separator. Aluminum can be recycled again. Keep magnets away from phones, tablets, and cards. Steel sticks to magnets.
Think Like a Scientist
Now, think like a scientist! Use a magnet to test metal items in your home. Which are attracted to it? Sort them into two piles. Keep magnets away from phones, tablets, and cards. Was a soda can attracted?
Outro
Aluminum cans jump off the belt because a fast-spinning magnet creates swirling currents inside them, making them act like magnets that are pushed away into their own bin. Science is amazing! Keep asking questions! The more you look around, the more wonders you will find, so keep your eyes open! Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!