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Cake day: August 15th, 2023

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  • I also shave with a safety razor/shavette and spend about twice as long for a close shave as only the first pass. Also being the type worried for time, I’ve clocked myself and typically end up at just under 4 minutes including warm-up, post-shave creams, brushing, and oiling.

    You go once with the grain, once across it (90 degrees) and then once against it but with a lower angle than the others (so you don’t cut/irritate unnecessarily). Lather before each pass as per usual. The time to get everything set up and work up the first lather is longer than going another two passes.

    Edit to add: I shave like this about every other day, but let it go over weekends, or other times I resent my worksona. I have chosen shaving gear to make it fun though, with a nice brush & bowl, a nice smelling shaving soap, etc. My best trick was to find a better suited razor blade, Dorco Platinum, makes it easy, fun and lasts me two weeks before having to change. I’m sure other brands are great too, that’s just the best one I have available.

    I’m trying to grow out a beard, so I don’t trim it down, but shape it once a week with some scissors and a comb.

    Back when I couldn’t be bothered, I mostly grew it wild, brushed and shaped it 1-2 times/week, and trimmed it down in length every few months. Nowadays we have barbershops around and I can have a professional style it while I get a haircut.
















  • Heat is electromagnetic radiation - photons, sound is mechanical displacement - phonons.

    They mostly propagate the same due to being waves, in most other respects they are very different.

    Heat convection is an entirely separate process where heat radiation is aided by the movement of the surrounding medium. Where it would otherwise heat up it’s environment, convection keeps the environment from heating up. Compare coffee in a thermos (very little convection) to a cup you’re blowing on (significant convection); more air movement - more cooling.

    Also, destructive interference does not at all work like that.

    Maybe a more useful analogy could be that waves have like walking animations, where in part of the animation they go up, and in another part they go down. Destructive interference happens when a wave in its’ “up” phase crosses a wave in it’s “down”, meaning the resulting movement looks like nothing. The waves don’t however interact in any way, and will continue on their way and on their own animation cycles.

    The shifting and heating parts are technically true but require very specific circumstances, enough so that I’m more prone to believe it’s another misunderstanding of the physics behind this. But I’ll give you the benefit of the doubt.