# @stem_antics on Instagram

- **Type:** Image
- **Original URL:** https://www.instagram.com/p/DPUt_9NgWrb
- **Gondola URL:** https://gondola.cc/posts/76866399-stem-antics-instagram
- **Thumbnail:** https://img.gondola.cc/tr:w-,h-,fo-auto/postThumbnails/f5896ad098.jpg
- **Posted:** 2025-10-02T22:32:58.000+00:00
- **Account Owner:** Stem Antics (@stem_antics) — https://gondola.cc/stem_antics

## Caption

Ever heard of a Prince Rupert’s Drop?
It looks like a delicate glass teardrop, but it’s one of the strangest physics demos you’ll ever see.

Here’s what’s happening:
👉 The head (bulb) is hit with a hammer. It survives.
👉 The thin tail is snapped. The entire drop explodes into dust.

Why?
	•	When molten glass is dropped into cold water, the outside cools and solidifies instantly, locking in compressive stress.
	•	The interior cools slower, creating tensile stress.
	•	The result: the bulb can withstand enormous force (even gunfire in some demos).
	•	But the tail is a weak point. Once cracked, stress waves race through the glass at up to 1,500 m/s, causing total fragmentation.

This paradox—fragile yet indestructible—shows how materials science and stress distribution can flip our intuition.

✨ Think about it: this 17th-century curiosity still teaches modern engineers about toughened glass, stress control, and fracture mechanics.

What would you test with a Prince Rupert’s Drop? ⚡
Tag a friend who’d love this science trick, and drop your thoughts below.

#STEM #ScienceDemo #PhysicsExperiment #PrinceRupertsDrop #MaterialScience #STEMeducation #GlassPhysics #EngineeringFacts

## Stats

- **Views:** 0
- **Likes:** 48
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- **Comments:** 3

## Credits

No public credits are recorded here. This does not identify who made the post.

## Tags

sciencedemo, engineeringfacts, physicsexperiment, stem, materialscience, stemeducation, glassphysics, princerupertsdrop

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