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Shocking Discovery: Scientists crack case of “screeching” Scotch tape

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Scotch tape has been a household mainstay for nearly a century, but it still holds some scientific surprises. Researchers have discovered that the screeching sound emitted when one rapidly peels Scotch tape—akin to the screech of fingernails on a chalkboard—is the result of shock waves produced by micro-cracks propagating along the tape at supersonic speeds, according to a new paper published in the journal Physical Review E.

https://arstechnica.com/science/2026/02/heres-why-scotch-tape-screeches-when-its-peeled/

Is this as good as these ??

The clap sonic boom... When you clap your hands, the air trapped between your palms is violently compressed and forced outward. For a fleeting instant, microscopic jets of air accelerate beyond the local speed of sound before dispersing. What we hear is not merely “a clap”, but a particulate sonic boom - millions of tiny pressure fronts merging into one sharp crack...

The microwave hum - trapped photon chorus.... The low hum of a microwave oven is not merely the magnetron at work. As food absorbs microwaves, stray photons ricochet inside the cavity, briefly forming standing electromagnetic waves. These waves subtly vibrate the metal walls at audible frequencies. What you’re hearing is a metallic choir of imprisoned photons...

The “pop” of knuckles - cavitation thunder... Cracking your knuckles does not simply release gas bubbles. The rapid separation of joint surfaces creates a micro-vacuum that collapses in a process similar to cavitation near a ship’s propeller. The bubble implodes with such force that, on a microscopic scale, it generates a pressure spike comparable to a tiny underwater thunderclap...

Recon I could keep 'researchers' doing meaningless work for decades with some of this (made-up) stuff !!!... whistling

2 hours ago, Alan Zweibel said:

Scotch tape has been a household mainstay for nearly a century, but it still holds some scientific surprises. Researchers have discovered that the screeching sound emitted when one rapidly peels Scotch tape—akin to the screech of fingernails on a chalkboard—is the result of shock waves produced by micro-cracks propagating along the tape at supersonic speeds, according to a new paper published in the journal Physical Review E.

https://arstechnica.com/science/2026/02/heres-why-scotch-tape-screeches-when-its-peeled/

This has kept me awake for many a night.

Now I finally have the answer. A good night's kip awaits.....

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