Why do paper towels and Windex make a squeaky noise when wiping a window? And how come you can change the pitch just by moving a different direction?

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Why do paper towels and Windex make a squeaky noise when wiping a window? And how come you can change the pitch just by moving a different direction?

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2 Answers

Anonymous 0 Comments

Now I’m curious about all things that make noise when rubbed together. Like styrofoam and nails on chalkboard.

Anonymous 0 Comments

I believe it’s called stick-slip phenomena. There’s a certain amount of friction between the wetted paper towel and the class. When enough pressure is applied it suddenly slips.