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Cake day: 2023年6月14日

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  • SomeoneSomewhere@lemmy.nztoxkcdxkcd #3106: Farads
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    18 天前

    No. They provide phase shift to give the single-phase induction motors a rotating rather than oscillating magnetic field. They charge and discharge 100/120 times per second depending on grid frequency.

    They do not cover inrush current, and would need to be orders of magnitude bigger and a different topology to do so.





  • It means more tax take and less superannuation spending. Depends on the country’s superannuation system, of course.

    That means more money available for all the things taxes are used for, many of which are very very necessary.

    How can you justify cuts to the healthcare system because you claim to not have enough money, but then pay pensioners some thousand dollars a fortnight, regardless of what assets or other income they have?






  • The issue with aviation hydrogen is… well, lots.

    • Fuel cells are heavy and direct combustion is inefficient and tougher than burning kerosene.

    • Aircraft typically use the wing structural members as the fuel tank walls. Both cryogenic and pressurised options make that a non-starter.

    • Lower density means much bigger tanks.

    • Self-vapourising fuel is a major crash issue.

    • Round trip efficiency for H2 is still terrible.

    Plants may not be particularly efficient per km^2 but arable land isn’t actually that hugely scarce.

    Reducing aviation is really the only thing that’s actually going to work.