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Cake day: June 11th, 2024

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  • There are guitar pedals that have toggle dials (? dunno if that’s the correct term). But they are dials for things with several discrete settings (usually more than the two or three that a typical dipswitch can handle).

    Off the top of my head, the JHS pedals where they pack like 7 or 8 versions of an OD circuit into a single pedal (Bonsai, Muffaletta, PackRat), all have such dials. They click into place and there is nothing in between. And it works just fine.

    Old television dials also come to mind. Discrete channels with nothing but dead air in between.







  • prole@lemmy.blahaj.zonetoScience Memes@mander.xyz[Thread] Mental Math
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    18 hours ago

    Pretty impressive. I think they’re underestimating/ignoring the input from hearing, especially with the second one where he probably (subconsciously, of course) heard the ball bounce near his foot. Plus the subtle changes in air pressure around his legs to tell where the ball is, etc.

    Cool video, thanks.

    Edit: Still watching as they’re analyzing his free kick. Cool shit. The human body is wild.

    One thing I don’t really see people talk about is how Ronaldo (and other soccer/football players) use their opposing leg to kind of hop up and dissipate any energy that they didn’t transfer into the ball. Fucking cool. You don’t even realize it’s happening.

    I haven’t seen any videos on it, but I remember doing kinematics problems in school involving baseball pitchers and how they throw, and it is actually insane. Each joint and section of the pitcher’s arm is like perfectly timed to provide the most velocity to the projectile. So you add up the momentum from the swinging shoulder to the momentum from the elbow to the momentum from the wrist, to the momentum and spin from the fingertips. Baseball is boring as shit, but the physics behind pitching is cool af.





  • Then you’re getting into things like muscle memory. I’m not a neuroscientist, but I imagine that could also be boiled down to math being done subconsciously and instantaneously in your brain.

    Almost like if you do a thing enough times, you just look it up in a chart instead of deriving it from the equation every time…