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Joined 1 year ago
cake
Cake day: March 31st, 2025

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  • But anyways - why is there a vacuum in the jar? To preserve the jam? Isn’t jam a preserve? Like, I thought the whole raison d’etre of jam was as a way to make fruit keep, unrefrigerated, through the winter? Why must we preserve the preserve? Quis custodiet ipsos custodes?

    this is “fucking magnets, how do they work” translated to rationalist, except that explaining magnets involves quantum mechanics and explaining jam jars involves high school physics (saturated vapor pressure vs temperature. that might be before high school). i also like how one linked explanation sits near two pieces of slop and is wrong