this post was submitted on 07 Oct 2023
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Science Memes

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[–] JockerBlack@lemmy.ml 0 points 11 months ago* (last edited 11 months ago) (1 children)

If you don't get it:

It takes the same amount of energy to increase the temperature of water by ~70°C (room temp=30°C and boiling point = 100°C) as it takes to send that cup of water 30 000 meters into the air. (If I did the math right)

[–] funnystuff97@lemmy.world 0 points 11 months ago* (last edited 11 months ago) (1 children)

My math: Boiling a cup (0.24 kg) of water from 25°C to 70°C ~45kJ (0.24kg×45°C×4182J/kg°C) Raising 0.24 kg of water up a height 30,000 m ~ 71kJ (0.24kg × 9.8m/s^2 × 30,000 m)

So my math says raising the temp of a cup of water from room temp would be equivalent to raising it about 19 km high.

Edit: I'm a moron who can't read, boiling water from 25 to 100 °C takes:

0.24 kg × 75 °C × 4182 J/kg°C ~ 75kJ

[–] JockerBlack@lemmy.ml 0 points 11 months ago* (last edited 11 months ago) (1 children)
[–] funnystuff97@lemmy.world 0 points 11 months ago (1 children)

God I'm stupid. I misread what you wrote as raising water to 70°, not raising water by 70°, without even thinking that that's not how you make tea. Fixed my math, and the numbers now check out.

[–] onion@feddit.de 0 points 11 months ago

Actshually, that is how you make green tea