this post was submitted on 10 Jul 2025
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Science Memes

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163
Planck units (fedia.io)
submitted 1 day ago by [email protected] to c/[email protected]
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[–] [email protected] 9 points 18 hours ago (1 children)

In my heart, these are the definitions of Planck units.

[–] [email protected] 1 points 19 minutes ago

Quick, someone make a heavier Honda Accord and destroy the universe!

[–] [email protected] 16 points 21 hours ago

[–] [email protected] 10 points 1 day ago

I for one like to keep things simple and just express everything directly in units of the number of periods of the radiation emitted by the ground state hyperfine levels of Cesium-133.

[–] [email protected] 41 points 1 day ago (1 children)

I'm having a Planck IQ moment trying to decypher the four lines of distilled aneurysm with which you just presented me

[–] [email protected] 8 points 17 hours ago

Yeah it's missing the text, "...then the Planck X would be..." for the first two.

[–] [email protected] 57 points 1 day ago (2 children)

Need an explanation? The smallest possible black hole is called a Planck particle. It should have a mass of a Planck mass, a size of an Planck length, should evaporate in a Planck time, releasing a Planck energy.

[–] [email protected] 5 points 18 hours ago* (last edited 10 hours ago)

By the way, the evaporation of a Planck particule should generate a power of P = Planck energy / Planck time = 3.629 × 10^52 W --> 36.29 million million million million million million million Gigawatts. More than enough to power a time machine.

[–] [email protected] 23 points 1 day ago

Ooookay. I feel like I've heard Planck length/time used in other (perhaps wrong) contexts. So the mass and energy seemed wildly large by comparison.

[–] [email protected] 9 points 1 day ago (1 children)

is the energy equivalent to what’s stored in the gasoline? or does the car factor in too?

[–] [email protected] 22 points 1 day ago

10^9 Joules is roughly the chemical energy of a full tank of gasoline. The mass-energy of the car (or even just gas itself) would be many, many orders of magnitude higher.

[–] [email protected] 49 points 1 day ago (1 children)

Plank length: usually 10ft for 2x4s. Though, you can get them cut to length.

[–] [email protected] 4 points 1 day ago

You can what? You mean I can put down this bread knife and just have my house built for me? I think I'll keep my sense of pride and accomplishment, sucker...

[–] [email protected] 35 points 1 day ago (1 children)

Aneurysm post

[–] [email protected] 4 points 1 day ago

Aneurysm posting is my middle name :3

[–] [email protected] 16 points 1 day ago

Wat.