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Cake day: August 9th, 2023

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  • Deme@sopuli.xyztomemes@lemmy.worldW Celsius
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    2 days ago

    Could you give an example of a situation where metric makes less sense than imperial? I will then explain to you that it only appears to you like that, because those are the units you’ve lived your whole life using. Without that baggage, the adaptability and easy conversions make SI-units objectively superior in every situation.



  • We aren’t at that spot, but in space above and behind it. Our horizon is different to the horizon at the prism, and on the surface there the Earth may well be slightly below the local horizon. Hard to say for certain since this is AI slop and the perspective may be wonky.

    That being said, the prism is so tall that it would probably still be at least slightly visible from the Earth.










  • My understanding of the term is that it describes leftists who have grown disillusioned with the methods of the left (primarily society level stuff like the proletarian revolution), instead focusing on the more local level through stealing and insurrection etc…

    Basically leftists but who no longer hold out hope for the wider society.




  • Stars are dim. Earth and the Moon are bright. If you exposed the shot such that stars would be visible, the Earth and the Moon would be horrendously overexposed.

    If you look at this one of the moonlit nightside of the Earth they took on the way out, you can see stars. The website has EXIF-data on the bottom with more info on the exposure.



  • Deme@sopuli.xyztoFuck Cars@lemmy.worldfuck cars and live a little
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    21 days ago

    You are thinking of perfectly elastic collisions. That’s a fantasy and not applicable to the real world. A human body isn’t a beach ball and cars have crumple zones (although I believe pickups suck in this regard as well).

    And your comparison isn’t applicable in terms of masses either. Both a sedan and a pickup are way heavier than a person.

    Edit: Without getting too deep into the math, let me put it this way: The energy of the impact is equal to the energy that the car loses during that impact. The car doesn’t lose mass, so it depends instead on how much the car loses velocity. That depends on how the mass of the other object stacks up against the mass of the vehicle. Car hits something much heavier than itself? It stops and all of it’s kinetic energy is expended. Car hits something much lighter? A bug on a windshield. A human obviously isn’t quite as neglibly light as a bug and the mass of both the human and the vehicle do factor into this, but with both a sedan and a pickup truck, the speeding vehicle never expends more than a fraction of it’s kinetic energy on the impact itself. The rest of it is dealt with via breaking, and a pickup will have a harder time slowing down due to it’s kinetic energy.


  • Deme@sopuli.xyztoFuck Cars@lemmy.worldfuck cars and live a little
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    22 days ago

    Not all of that energy is transferred. The car doesn’t stop as if it hit a wall. Usually it barely slows down. The human on the other hand gains at most the kinetic energy corresponding to their body mass and the speed of a human bouncing forward off the car at around the same speed as the car was going, so a tiny fraction. Of course impact geometry will determine the specifics and pickups suck there too. The important thing about kinetic energy is that it’s dependant on the square of the velocity. That’s why speed kills. The mass is just a linear relation.