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Cake day: July 4th, 2023

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  • deranger@sh.itjust.workstoLemmy Shitpost@lemmy.worldVirgin Physicists
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    20 days ago

    Eh, it’s just fundamentally ugly to me and that really turned me off. Rounding doesn’t help, that’s like turning the lights off for sex to make it better. I still know the ugliness exists, even if I don’t see it.

    Engineering is still very cool to me, and I have huge respect for those who do it, but I’d never have made it. It’s physics but even further perverted by reality. Math was beautiful to me because of how “pure” it was. Just straight logic, divorced from the messy world we live in. Tidy coefficients and elegant derivations.











  • I don’t follow the logic. Human teeth would be better if more children died? That “quality check” only applies if an organism dies before mating, which happens usually around teenage years for humans.

    Maybe those hunter gatherers had better teeth because of what they ate. There seems to be too many other potential factors to simply pawn it off on Darwinism.

    https://www.npr.org/sections/health-shots/2013/02/24/172688806/ancient-chompers-were-healthier-than-ours

    In a study published in the latest Nature Genetics, Cooper and his research team looked at calcified plaque on ancient teeth from 34 prehistoric human skeletons. What they found was that as our diets changed over time — shifting from meat, vegetables and nuts to carbohydrates and sugar — so too did the composition of bacteria in our mouths.

    However, the researchers found that as prehistoric humans transitioned from hunting and gathering to farming, certain types of disease-causing bacteria that were particularly efficient at using carbohydrates started to win out over other types of “friendly” bacteria in human mouths. The addition of processed flour and sugar during the Industrial Revolution only made matters worse.


  • The spring imparts the same amount of energy to the marble and bowling ball. The two objects are not at the same velocity, the marble would be moving significantly faster.

    The same velocity doesn’t necessarily imply the same amount of kinetic energy right?

    Not at all.

    E = 1/2mv^2

    Since energy (E) is provided by the same spring in both cases, the energy of the bowling ball and the marble are equal. Since mass (m) is much higher for the bowling ball, the bowling ball’s velocity (v) must be significantly lower.