[–] 1 point 1 month ago

100% about perception, but doesn't mean it's not valid. One long line that's constantly moving is better than a small line that's stuck for a while. Also, as you mentioned, it prevents issues when one of the checkouts is stuck for whatever reason. The line would still move, just a bit slower.

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  • [–] 1 point 1 month ago (1 child)

    Problem is that those cartridge nozzles that deposit tiny droplets of ink precisely when and where you want them are pretty close to magic.

    They're about as easy to manufacture as microchips, and they're also the one part of the inkjet printer that you absolutely need to be on point if you want it to print right.

    I'm surprised we don't have open source laser printers though, that's still hard but should be doable, if you can source the material for the rollers and figure out the led strip that charges it?

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  • [–] 6 points 3 months ago (5 children)

    You're basically trading energy to move higher volume of air. The fan can move smaller amount of air at higher speed, but larger amount at a gentle breeze feels nicer and helps with circulating the air in the room better.

    You could achieve it by taking that exact motor and slapping a bigger fan onto it, but that looks less cool and probably produces more noise? Maybe there's some efficiency differences if the motor is better at spinning fast, but as a spherical cow in vacuum it should be similar.

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  • [–] 1 point 8 months ago

    If it's homework, the teacher has to grade multiple classes with 30-something students in them, so they probably ran on autopilot at that point.

    ...equally likely, they had a laugh but this is not an acceptable way to answer it. Most likely done by the dumbass "funny" kid in class who already tired them out.

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