•  Bilbo_Haggins   ( @Bilbo_Haggins@lemm.ee ) English
    21•7 hours ago

    Kids love this shit as long as you keep it at the ELI5 level and stop when they are done and lose interest. My kid will throw around words like “microorganism” and “bioaccumulation” because I actually explain biology concepts when he asks. The other day he had a question about atmospheric composition and he was absorbed for about 5-10 minutes, complete with looking at molecular diagrams, and then he was done and went off to make his Lego people fight each other with flamethrowers.

    If you have knowledge, share it with kids and let them see you enjoying science. They absorb more than you might think.

  •  ᵀʰᵉʳᵃᵖʸᴳᵃʳʸ   ( @TherapyGary@lemmy.blahaj.zone ) English
    4•7 hours ago

    The metamorphosis of H₂O from a crystalline solid is instigated by an endothermic enthalpic absorption, destabilizing its tetrahedrally coordinated lattice architecture. This thermodynamic perturbation amplifies molecular Brownian motion, surmounting intermolecular hydrogen bonding and effectuating a phase transition into a disordered liquid state.

      •  CuriousRefugee   ( @CuriousRefugee@lemmy.ml ) English
        14•10 hours ago

        Yes, there’s a bit of a myth around Bernoulli’s principle (faster moving fluids have lower pressure) and how much it matters for lift in plane wings. It came up in the conversation because I was trying to describe what air pressure is in general, and made an analogy to a pan flute (he plays flute in band).

        Disclaimer: I’m an aerospace engineer, but I do not claim to be an expert on topic.

        But for plane wings, the myth is really that the air above the wing moves faster because the curved surface is longer. That’s pretty much dead wrong, but is still in tons of textbooks. The air above the wing does move faster, but it’s because of a bunch of complicated physics that to be honest, I don’t really understand any more. I may have even been taught wrongly in college. But the result is that there is a velocity difference on a cambered wing even when it’s flat, and thus Bernoulli’s principle does apply, and there is a pressure difference giving you lift.

        But that speed difference is mostly important at cruising altitude, when the wings aren’t angled, and it’s positively correlated with airspeed, so the thrust matters way more. When you’re climbing, the angle matters more. The camber (curvature) of the wing, the airspeed, and the angle of attack all lead to that pressure difference, along with a few other things like circulation, which is also caused by a sharp edge at the back of the wing. But everything kind of works together to generate that pressure difference and hence the lift that can combat gravity. It’s actually pretty hard to try and dumb it down without saying things that aren’t wrong.

        •  Samvega   ( @Samvega@lemmy.blahaj.zone ) English
          5•9 hours ago

          This is fascinating, thank you. I understand that Bernoulli’s principle is involved, but it is not the sole nor even the most important factor in fixed-wing aircraft flight (if I’m using terms properly), and you’ve added some interesting context.

          I give you my gratitude, and also my belief that you sound like an awesome sibling-of-a-parent to your nephew.