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Joined 2 years ago
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Cake day: June 14th, 2023

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  • Nothing to me says ‘sexy’ quite like your grandad and your great-grandad being the same guy, or your (great * 5)-grandmother / grandfather being one man and woman, when most people have that responsibility spread between 64 people.

    Close family. Must have made Christmas easy - having the in-laws round isn’t so bad when they’re your own blood relatives too.




  • This, exactly. When we redid our bathroom, we went from “immersion tank” hot water with about three metres of pressure behind it, to central heating in a closed system, where both hot and cold have the exact same pressure, about thirty metres head. Went from being basically impossible to have a shower, to being an absolute pleasure where nearly the entire range of the tap gives a useful temperature, and it’s got a right blast of pressure behind it too.

    Another alternative would be an electric shower - since you’re just heating up cold water, the pressure is “always the same”. They tend to be a bit pathetic and crap, tho.


  • It’s one of those materials that has an almost complete list of superb properties, with one overwhelming downside. It’s cheap, abundantly available, completely fireproof and can be woven into fireproof cloth, adds enormous structural strength to concrete in small quantities, very resistant to a wide range of chemical attacks. It’s just that the dust causes horrific cancers. See also CFCs, leaded petrol, etc, which have the same ‘very cheap, superb in their intended use, but the negative outweighs all positives’.

    One of the ‘niche industrial applications’ was the production of pump gaskets in high-temperature scenarios, especially when pumping corrosive liquids. We’ve a range of superalloys that are ‘suitable’ for these applications - something like inconel is an absolute bastard to form into shapes, but once you’ve done so it lasts a long time. But you still need something with similar properties when screwing the bits together. For a long time, there was no suitable synthetic replacement for asbestos in that kind of usage.

    If you know that the asbestos is there, have suitable PPE and procedures, then IMHO it’s far from the worst industrial material to work with. It’s pretty inert, doesn’t catch fire or explode, and isn’t one of the many exciting chemicals where a single droplet on your skin would be sufficient to kill you. What is inappropriate is using it as a general-purpose building material, which is how it was used for so long, and where it was able to cause so much suffering for so many people.




  • Bear in mind that the gallon we use is different from the US gallon, too:

    • a UK gallon is eight (imperial) pints of 20 fluid ounces, so 4.54 litres
    • a US gallon is 231 cubic inches, so 3.79 litres

    The reason that I thought American car fuel economy was so terrible as a child is partly because UK mpg is +20% on US mpg for the same car on the same fuel. But also, because American car fuel economy is so terrible.


  • That’s not correct, I’m afraid.

    Thermal expansion is proportional to temperature; it’s quite significant for ye olde spinning rust hard drives but the mechanical stress affects all parts in a system. Especially for a gaming machine that’s not run 24/7 - it will experience thermal cycling. Mechanical strength also decreases with increasing temperature, making it worse.

    Second law of thermodynamics is that heat only moves spontaneously from hotter to colder. A 60° bath can melt more ice than a 90° cup of coffee - it contains more heat - but it can’t raise the temperature of anything above 60°, which the coffee could. A 350W graphics card at 20° couldn’t raise your room above that temperature, but a 350W graphics card at 90° could do so. (The “runs colder” card would presumably have big fans to move the heat away.)