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Cake day: August 9th, 2023

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  • it made no sense to me

    That’s all CAD software. You can’t just jump in and intuitively learn it by just doing it. It’s like trying to learn a programming language. You need a solid tutorial to explain the basics, at a minimum. Even with something simple like TinkerCAD.

    FreeCAD was probably the worst choice. Give TinkerCAD a try. I know the FOSS community will hate me for saying this, but I like Autodesk Fusion for a full featured CAD package. It has a very steep learning curve, like all CAD software, and you need to watch some videos first. You will make a ton of mistakes and do even simple things wrong at first, but once you get going, it’s great to use.

















  • Because math. Also, it’s the average density.

    It’s probably some obvious volumetric thing, like how the volume of a sphere increases exponentially when you increase the radius. V = 4/3 πr³. It seems the mass is some radius analogue in whatever equation governs black holes.

    It’s also interesting to note that the surface area of a black hole’s event horizon is proportional to how much inormation the black hole contains. This was discussed in a recent PBS Spacetime Video.

    The thing is, you have to first create the black hole with the mass of the universe in order to be so large that it has the same average density as air, right? Maybe I’m totally wrong and need to watch the video.