Naked Science Forum
General Science => General Science => Topic started by: Wink Grise on 05/11/2010 18:30:03
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Wink Grise asked the Naked Scientists:
Hi Chris and Team,
Love the show (http://www.thenakedscientists.com/HTML/podcasts/).
I have a physics question. I don't think it's been covered much or at all, even though it's of course, incredibly important! I can't find much info online, mostly because it's difficult to phrase the question in a search engine. Here goes...
INCREDIBLY IMPORTANT PHYSICS QUESTION
When I shake a new carton of orange juice (the good stuff, no concentrate for me), it is difficult to shake until I break the seal. What's up with that?
The new carton is under a vacuum (well, a tiny vacuum, I know it's hard to get a "good" or "real" vacuum even in outer space...), so I would think there's a good few centimetres for the juice to slosh around free and easy. But when you crack the seal and let air fill the void, you've got this dense gas, so it should be harder to shake now...but it's much easier!
This could be all perception, but others have observed this effect.
What is going on?
Cheers,
Wink
What do you think?
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We discussed this question on our show
We took this on as this week's Kitchen Science!
Click to visit the show page for the podcast in which this question is answered. (http://www.thenakedscientists.com/HTML/podcasts/show/2010.11.28/) Alternatively, [chapter podcast=2913 track=10.11.28/Naked_Scientists_Show_10.11.28_7585.mp3](https://www.thenakedscientists.com/forum/proxy.php?request=http%3A%2F%2Fwww.thenakedscientists.com%2FHTML%2Ftypo3conf%2Fext%2Fnaksci_podcast%2Fgnome-settings-sound.gif&hash=f2b0d108dc173aeaa367f8db2e2171bd) listen to the answer now[/chapter] or [download as MP3] (http://nakeddiscovery.com/downloads/split_individual/10.11.28/Naked_Scientists_Show_10.11.28_7585.mp3)