• 0 Posts
  • 31 Comments
Joined 1 year ago
cake
Cake day: June 30th, 2023

help-circle








  • The tldr is not every species with a uterus menstruates.

    Most animals’ bodies don’t convert into a child bearing state until they’re already pregnant. Dogs and cats for example don’t grow breasts (or line their uterus) until they’re pregnant. Humans (and a few other species) evolved to just be ready to raise a child at any time, which results in permanently developed breasts and a continuous refreshing of a uterine lining.












  • teruma@lemmy.worldtoDad Jokes@lemmy.worlddoes this qualify? :)
    link
    fedilink
    English
    arrow-up
    1
    ·
    11 months ago

    Induction!

    Did you ever do the experiment where if you coil a wire, and then hook it up to a battery, it becomes magnetic?

    Well it works in reverse, too. If you move a magnet near a coil, it generates power! Specifically, its the motion of the magnet that makes power, so the magnets are mounted to the spinny spinny bit and the coils are in the base hooked up to the grid.

    (this is an oversimplification)

    In slightly more detail, motors work on the same principle, since they’re just magnets and coiled wires. Apply power to the leads to spin the motor, but also, you can spin the motor by hand like a crank to generate power at the leads.

    This is also how wireless charging works. Power goes into a wired coil that makes a magnet that makes power in another wired coil inside your phone,