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Cake day: June 12th, 2023

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  • It’s pretty natural not to reserve seats on shinkansen, because you can find seats unless you are travelling at peak hours (and there are trains every 20 minutes or better)

    The travel time to and from airport, and the baggage+security easily eats into the 1.5 hour savings. Same day fare on shinkansen remains constant, unlike 30k+ that flights demand.

    On shinkansen, you have lots of leg room compared to LCC seats. There’s also enough space to move, talk and option to reconfigure the seats for a group of 4 or 6 travelers. There’s cell connectivity (and decent wifi onboard) so you don’t have to pay through your nose for in flight WiFi. The toilets are spacious. There’s dedicated place to talk on the phone. Less noisy and fewer bumps than a flight.

    This makes the bullet trains really attractive for business and family travels (with kids). You don’t need to plan beforehand and there’s less inconvenience compared to flight. Moreover, the cost also balances out if you’re traveling to a smaller city with poor air connectivity.

    These kind of options actually allow spur of the moment travels over such distances.

    I know plenty of people who plan and use bus and flights due to the cost benefit, but also tons of people prefer the hassle free travel on shinkansen




  • Without context this link is just bad. Plant growth will not reduce CO2 levels because biosphere is temporary store or carbon (since it is a part of the carbon cycle)

    We are putting carbon (into the atmosphere) that was previously buried. So putting a tiny bit of it back into plants doesn’t help because:

    • those plants will die and release the carbon back
    • the number of plants added is inconsequential compared to the deforestation
    • the number of plants needed to offset additional carbon is humongous






  • That’s why it’s interesting that inverse square is in electrostatic and gravitational forces only. Weak and strong force don’t follow inverse square. And we don’t see the highly complex organization inside the nucleus that we see outside it (otherwise we’d have stable orbits inside the nucleus as well)


  • Bertrand’s theorem states that stable orbits are only possible for one single inverse distance relation (in classical mechanics): inverse square

    If the law is not inverse square (or harmonic oscillator), there will be no long lasting orbits, no galaxy clusters, no galaxies, no star systems, no planet and moon pairs.

    If the electrostatic force wasn’t inverse square, electromagnetic force would look much different. No gauss law would be possible.

    Inverse square relationship is really neat