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Joined 3 years ago
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Cake day: August 14th, 2023

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  • Probably a dumb question, but here it goes-

    Escape velocity is the velocity needed to escape the moon/planet’s gravity without any further propulsion, right?

    A stone thrown upwards would slowly lose its velocity and then start falling back because there’s no engine to keep it going.

    But an “ideal spherical bird” could keep going at a constant velocity of 20m/s to escape whatever planet it wants to leave, right?

    Does the escape velocity really matter here? (Assuming that all other issues like lack of air are ignored)





  • overcast5348@lemmy.worldtoScience Memes@mander.xyzNot a single one
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    2 months ago

    Externalized costs are a thing though. For instance, a coal plant spewing smoke (and radiation) costs everyone else money. A nuclear plant OTOH is usually responsible for dealing with all of its own shit. So it’s not always an apples to apples comparison to consider just the profitability of a project.


  • Your comment reminded me of this moment I had at an office lunch table:

    Someone from sales: I’ve been having a terrible day, the P-O-C at {client company} is being annoying yadda yadda…

    Someone from HR: glaring, and taking mental notes.

    Me, a dev: wondering how things could’ve gone wrong considering that we hadn’t even shipped anything for them.

    It took us all a moment to realize that "PoC " meant different things to each of us - Point of Contact, Person of Colour, and Proof of Concept. Somehow the salesperson could’ve been talking about any of those and it’d make, so none of us questioned ourselves first.










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    2 years ago

    That’s a lot of moved goalposts to justify the weird temperature scale logic but okay.

    You’ve essentially justified that 0F and 100F are what they are because some old people died when it was 100F (most people, including the old are perfectly fine at this temperature all around the world) and because you can manage at 0F while wearing a ton of layers and not need a heat source (do all old people manage to survive just fine at 10F or 20F by just putting on some layers?).

    Either way, this pointless conversation had gone on for way too long. Have a good day! :)


  • I’m saying that 0F is waaaaaaay more dangerous than 100F so the logic of those particular temperatures being the 0-100 ends of the scale can’t be explained by how dangerous they each are.

    Almost everyone would be fine staying outside for 30 minutes at 100F without no external help (shade, cool drinks etc). Almost nobody would be fine after staying outside at 0F without external help (parka, thermals etc).

    To me, with absolutely no data, it feels lie:

    • 0F is as dangerous as 140F (you’re long dead if you’re outside in both cases)
    • 100F is as dangerous as 40F (mildly uncomfortable but safe for a while)

    So calling 0F and 100F both “really dangerous” and using that to justify them being the respective points of 0 and 100 disingenuous. Like, use Fahrenheit if that’s what you’re used to - I use it too because that’s what I’m used to. But I don’t explain the insane system with “it’s because the two ends are reallllly dangerous.”



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    2 years ago

    Fahrenheit: let’s use “really cold weather” as zero and really hot weather as 100.

    I don’t really have a horse in this race but this logic doesn’t seem legit to me.

    How is -17°C really cold weather AND 37°C really hot weather?

    One is actively trying to kill you if weren’t already dead by the time the weather got that bad. The other just makes your nuts stick to your thighs – if you’re in a humid place.

    I’d agree with the logic if 100F was equal to something like 65°C. 🤷‍♂️