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Cake day: July 18th, 2020

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  • Fusion won’t be the silver bullet people tout it as for much of the same reasons as fission isn’t (mostly politics). No politician wants to spend billions of dollars on something that is going to take a decade to even be functional and another decade to break even. It would get cheaper with scale, but so would fission, we just never let it get there. It also still produces radioactive waste, despite what proponents claim, and it even produces more radioactive waste than a fission reactor by volume. But it isn’t as long-lived.

    These are the same tired arguments we hear about fission. If your country isn’t actively building fission, it’s probably not going to build fusion, aside from demonstrations.




  • I honestly can’t say I need resolution finer than Celsius for air temperature. So many other factors have such bigger effects on the perceived temperature (humidity, UV index, if the sun is shining, wind speed, etc) that a granularity of 1°F doesn’t make sense to me.

    Pool temperature, on the other hand, yeah, 1°F or 0.5°C resolution is perceptible.


  • Xavienth@lemmygrad.mltoMemes@lemmy.mlWhy still using the imperial system?
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    3 months ago

    I don’t like the bridge example because the values were chosen (intentionally or not) conveniently for metric. Change it to every 4 feet or 1.3 metres and it’s no longer convenient in either system. There are better examples that demonstrate the superiority of metric.

    For example, pool cleaner says 1 unit per 10,000 gal or 40,000 L.

    21’ diameter, 3’ tall. So ~1000 ft³. Multiply by 1728/231 for gallons.

    7 m diameter, 1 m tall. So ~40 m³. Multiply by 1000 for litres.

    If you’re curious where 1728/231 comes from, there are 12³ (1728) in³ for a ft³. Then the gallon is defined as 231 in³