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Joined 2 years ago
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Cake day: June 10th, 2023

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  • I think the difference in speed in the video is just perspective + distance, plust Iran has many different types of balistic missiles. I mean, technically speaking many balistic missiles do go at hypersonic speeds, but that’s not what people mean when they say hypersonic missile, they refer to missiles that fly very low at hypersonic speed and can maneuver before hitting their target. You can clearly see the balistic trajectory of these missiles.












  • Yeah you’d draw it on a vertical whiteboard, but in physics and math (or at least all the classes I had), you’d always draw a coordinate system with Z going up. I can understand why it would make sense for you to look at XY being a vertical plane, but I feel like it just makes more sense for XY to be the ground.

    Also, convenience wise, especially in e.g. game dev, for 90% of use cases it’s way more convenient for the first two coordinates to be the ground position and the last coordinate be the height. Whenever you’re thinking of the coordinates of something, you’d probably first think about its ground position and then its height, in which case it’s much simpler if those ground coords are at the start, instead of at the beginning and end of a vector.







  • Ok but that’s kinda shifting goalposts. My point was that the vast majority of Europe doesn’t artificially add fluoride into water, probably not without reason. Even then, just 3% of French people receive naturally fluoridated water, for Germany its < 1%, Italy also by the sound of the article probably <1%, Spain is 10%. It doesn’t give information about natural fluoridation levels in Croatia but it’s probably at the same levels and I can attest to the fact we don’t have a cavity epidemic.

    Interestingly it also notes this in the article:

    In the GDR (East Germany) in the late 1980s, about 3.4 million people (20%) were receiving water with added fluoride… A fluoride cessation study found that consistent with a previously observed population-wide phenomenon that the rate of cavities continued to drop after the fluoride concentration in water fell from the augmented 1.0 ppm to its natural level below 0.2 ppm. Water fluoridation was discontinued after the German reunification although still exists on some US military bases.

    My point is that I think it doesn’t really matter whether you fluoridate water or not and that it’s fine to be skeptical of it when the benefits in today’s day and age are minor and there might be potential drawbacks.