this post was submitted on 15 Mar 2026
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Science Memes

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[–] TankovayaDiviziya@lemmy.world 29 points 3 days ago (3 children)

I'm too dumb for maths because I have dyscalculia, but i am always amazed by the engineering crowd on how they could improve efficiency by finding and tweaking just the little things.

[–] neuromorph@lemmy.world 20 points 3 days ago* (last edited 3 days ago) (1 children)

Its simple rocket math. Every lb of weight must consume fuel.

Si.pky. 1 lb of weight needs 1 lb of fuel to escape orbit. But the fuel has weight also. So the effective fuel you need to lift the rocket and payload is exponential.

The harder stuff is orbital mechanics. Getting things into orbit is easy. Having thwm go where you want is the hard part.

[–] Town@lemmy.zip 22 points 3 days ago (2 children)
[–] GamingChairModel@lemmy.world 1 points 1 day ago

Good article for pointing out that specific rocket math. The optimistic tone of that article, though, is very much a product of its publication date of February 2020. The space programs have suffered major technical, financial, and political setbacks since then, and the geopolitical moment doesn't really lend itself to megaprojects like moon missions.

[–] Lucky_777@lemmy.world -1 points 2 days ago (1 children)

The sooner humans can move past rocket tech the better to be honest.

[–] NewSocialWhoDis@lemmy.zip 3 points 2 days ago

Stop living in a gravity well and we wouldn't have to expend energy to get out of it!!

[–] tetris11@feddit.uk 4 points 2 days ago* (last edited 2 days ago)
  • Artemis tanks were 10m wide and 30m tall.
  • Cylinder surface Area = (2.pi.r^2^) * (2.pi.r.h) ^[curved area plus top and bottom circles]
    • 2 * pi * 5 * 30 ~ 1100m^2^ to paint
  • Paints paints about 10m^2^ per Litre paint
  • Need 1100 / 10 = 110 Litres of paint
  • 1L of paint weighs about 2kg
  • 110 Litres of paint weighs about 220kg
[–] icelimit@lemmy.ml 1 points 2 days ago (1 children)

Til dyscalculia. I hope you weren't born in asia

[–] TankovayaDiviziya@lemmy.world 4 points 2 days ago (2 children)

I am Asian 😂 I refuse to live up to the stereotype!

[–] chiliedogg@lemmy.world 1 points 2 days ago

Or expectations!

Or are you a doctor?

[–] icelimit@lemmy.ml 1 points 2 days ago (1 children)

So.. you're going to be a lawyer then?

[–] TankovayaDiviziya@lemmy.world 1 points 2 days ago (1 children)

I already work on STEM, without the E, but a little bit of M.

[–] icelimit@lemmy.ml 0 points 2 days ago (1 children)

How are you doing m without being m?

[–] TankovayaDiviziya@lemmy.world 1 points 2 days ago

It's mandatory to use calculators in my field to make calculations, so that has been saving me.