QI - Nobody Knows, Brazil Nuts Rise to the Top of the Packet
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It's well-known!
It's called the sugar-bowl principle - in mixed sugar granules and cubes, cubes are found at the top. Larger items migrate to the top when mixtures are shaken due to simple random processes that favour smaller items. All are being acted on by gravity to force them down. Smaller ones only need a small gap to fall, but larger ones need enough space below them to move down. Shaking makes gaps form, and more of the gaps allow small piece to drop.
randomxnp 2 weeks ago 2
@saturnGEEK That's completely true. We did it in a physics lesson - Stephen Fry for once is wrong!
OlirockCP 2 weeks ago
I always thought it was something to do with the density of the nuts. The more dense it is, the lower in the packet it is.
saturnGEEK 3 weeks ago
Damn, now I need a packet of mixed nuts...
TomFynn 3 weeks ago
@Camohat100 I have a purple suit like that. It's rather fetching.
DrEthanAsia1 1 month ago
It's because the bag has been shaken... the same way if you shake a sieve of flour the lumps will come to the top... Not sure why but I know it happens
munkymanmatt 1 month ago
Or the order could have something to do with the density of the nuts.. only a theory..
saturnGEEK 1 month ago
I want that purple suit. I really really want that purple suit
Camohat100 1 month ago 2
@TheThuomas, Yur right, its part of Brownian motion :D
TITANIUMMJA 2 months ago
Off course you know ! It can be modelled :)
TheThuomas 2 months ago