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You might have seen them in your shower, kitchen refrigerator or walls, or even you might have seen them hanging from the glass panel in the rear of a car you are following. They are suction cups, the product that really sucks. Erm, maybe that is not the best description of these objects, since they are very cool and useful and they don’t suck. Well, they do, but in the sense of suction, not in the other colloquial sense.

 

A cross section of a suction cup attached to a wall

A cross section of a suction cup attached to a wall

 So, how do these little suckers work? That’s the post for today. I have not explained any device recently, so I thought these would be a nice addition to the everyday physics series.

 

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