Physics and Free Software

  • 0 Posts
  • 7 Comments
Joined 2 years ago
cake
Cake day: June 5th, 2023

help-circle
  • Schadenfreude for the wicked is something we all indulge in, but prolonging pain rather than soothing it breeds hatred. Some kind of fuel for the onlookers, but what happens when you unchain the dog you’ve been beating? Someone’s going to win. Perhaps your team because the ire is high. But sacrifices have to be made. Your kin may die. Is that an acceptable result? That’s up to you to decide.


  • Perhaps in private, but not if you remind them.

    Consider this. Your asshole detestable uncle loses his house. On the one hand you can text him and say you deserve what you get you piece of shit.

    Or invite him over to watch a baseball game. Avoid politics. Quietly remind him not everyone is a piece of shit.

    Which do you think will more likely change his mind? Or which one will he double down on, write it off as an accident, and go deeper down the hole. I took one for the team.




  • wuphysics87@lemmy.mltoMemes@lemmy.mlTrickflation
    link
    fedilink
    arrow-up
    2
    ·
    18 hours ago

    It’s not really ‘right’ or ‘wrong’ it’s under a fixed set of assumptions. You raise a valid point. What does happen to the top and the bottom? I was ignoring them considering only the sides in the two most extreme cases.

    If I understand your case when the can is flatted the area gets much larger and when it gets taller it shrinks to a pin point. An equally valid approach


  • wuphysics87@lemmy.mltoMemes@lemmy.mlTrickflation
    link
    fedilink
    arrow-up
    4
    arrow-down
    5
    ·
    1 day ago

    Quick ‘proof’ the taller the can, the more material used:

    Consider two cases ignoring the top and bottom only focussing on the surface area. In the first case, you flatten so much the can has no height. This forms a ring that when unwrapped makes a length of 2 pi R.

    Now stretch the can to be ‘infinitely’ long. By construction, this is longer than 2 pi r. Given both are made of aluminum, and have the same density, the larger can has more mass requiring more material.

    The total mass must be a continuous function ranging from the linear mass density times the circumference of the circle to the same mass density time times the ‘length’ of the infinite line. This must remain true for any small increase in length between the two.

    I’ll leave this as an exercise to the reader. What if the circle has an infinite radius?