• ira@lemmy.ml
    149·
    1 年前

    I’m curious why you think ocean microplastics can stick around for a few more decades or centuries

      • glibg10b@lemmy.ml
        5·
        1 年前

        I was gonna argue that rolling resistance doesn’t have a large impact on efficiency, but apparently I was wrong

        https://en.m.wikipedia.org/wiki/Rolling_resistance

        An example of a very light high-speed passenger train is the N700 Series Shinkansen, which weighs 715 tonnes and carries 1323 passengers, resulting in a per-passenger weight of about half a tonne. This lighter weight per passenger, combined with the lower rolling resistance of steel wheels on steel rail means that an N700 Shinkansen is much more energy efficient than a typical automobile.