A Prince Rupert's Drop is so strong that you can hammer on one end without causing a crack, but watch out for the other end—it breaks easily and causes the whole thing to explode!
A Prince Rupert's Drop is so strong that you can hammer on one end without causing a crack, but watch out for the other end—it breaks easily and causes the whole thing to explode!
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What occurs is that the exterior of the glass cools quickly whereas the interior of the glass cools more slowly. When the interior cools it pulls on the top of the drop so that it becomes more compressed which adds strength to the glass, however, this cooling also has the complete opposite effect on the tail. SO when the tail breaks it causes the entire glass to fracture at more than 4000 mph, hence the explosion. Its all about stresses and tensions in the structure of the glass itself.
I suppose I could have as well. But seeing as no one else was answering the question I figured, being an experienced gaffer, I would explain the phenomenon.
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