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The physical version of that magic wormhole is called a slide rule.
by badlibrarian 3mo ago
The physical version of that magic wormhole is called a slide rule.
- eru 3mo agoAnother neat application, if a bit simplistic, are these mechanical paper computer that let you figure out your body-mass-index. They are basically two disks with logarithmic scales on them that you rotate relative to each other. Like a slide-rule, but circular. I think you can find them under the name 'BMI wheel'.
- madcaptenor 3mo agoThese exist for various medical usages. I've seen one to compute the due date of a pregnancy (from either the date of conception or the last missed period). This was at an obstetrician's office. It was probably dropped off by a sales rep and had the logo of some medication or other.
- eru 3mo agoYes. If you are clever enough, you can encode a lot of formulas in geometry and paper. Navigators of yore used to have a lot of these tools.
- utopiah 3mo agoIndeed, you can get yours today https://www.instructables.com/Make-a-simple-paper-slide-rule/ https://www.instructables.com/Make-a-simple-paper-slide-rule...