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Cake day: July 24th, 2023

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  • Actually, if you are using 7zip on windows 11, consider giving nanazip a try. It is 7zip but it adds the shortcuts to the new(and debatably worse) right click context menu on windows 11.

    And don’t quote me on this but I remember having seen somewhere that the devs of 7zip says they won’t update 7zip to use the new context menu.



  • royal_starfish@lemmy.worldtoMemes@lemmy.mlEVs
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    10 months ago

    You can use liquified hydrogen which need to be chilled and insulated, and will evaporate away in a short time if not properly sealed

    Or you use compressed hydrogen which means you are basically carrying an IED that weighs several hundred kilograms with the amount of pressure inside the gas tank

    And hydrogen combustion is as others have said, inefficient.

    Another issue is that you also need to use basically pure oxygen if you want to use a hydrogen fuel cell, otherwise the catalyst inside the cell would get poisoned

    And well, there is a car that did all that, the Toyota Mirai, but that also pretty much ended in commercial failure, due to lack of hydrogen filling infrastructure and a whole load of other reasons.




  • It is both, but the pressure one contributes more to lift. You can see this when a wing stalls, the airflow separates from the upper surface and the pressure difference is gone. The angle of a stalled wing still means air is directed downwards, but the overall lift is much smaller.

    At least that is what I’ve been told anyways