This Is What Happens When You Pour Molten Aluminum Into A Pumpkin

TheBackyardScientistPublished: June 21, 2016Updated: June 22, 20162,072 viewsVirality: 5%
Published: June 21, 2016Updated: June 22, 2016

It’s time to do Halloween, Backyard Scientist-style and what better way to decorate your house for Halloween than by using pumpkins. In this episode, the Jack O’Lantern meets his match in a 1000 degree aluminum and liquid nitrogen.

The inside of a pumpkin has a pretty interesting geometry. I had the idea to cast the inside to see what it looks like, but the inside of the pumpkin is very fragile and the 1000 degree aluminum pretty much destroys it as soon as it comes in contact with the soft flesh.

I thought freezing the pumpkin would provide more structural support, so I froze the pumpkin from the inside out with liquid nitrogen. My thermometer can only measure to -36f (-38c), and the pumpkin was colder than that. Liquid nitrogen has a boiling point of like -300 degrees. Which means it sucks heat from whatever it touches until that object is -300 degrees at which point it stops boiling.

Both pumpkins turned out awesome, although they were a bit stinky. There was some slight difference between the two. The one without the liquid nitrogen turned out a bit more chunky and rounded while the one with the liquid nitrogen turned out to be a lot more defined and slim. Which one do you think looked better?

Next time I cast any fruits i will definitely be freezing them first!

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