this post was submitted on 05 Aug 2023
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Memes

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[–] [email protected] 67 points 1 year ago (3 children)

Learning what fire actually is, like what the flames are literally made of, blew my freaking mind years ago.

Fire is literally just gas (and fine solid particulates suspended therein) that contains so much thermal energy that its black body radiosity has reached into the visual spectrum.

There are some types of flames that are NOT bright enough to be visible under ambient lighting conditions and can only be seen in environments that are very dark!

Pure ethanol, for instance, combusts dark enough that you can't see the flames in daylight conditions, or even under strong artificial lighting.

[–] [email protected] 42 points 1 year ago (3 children)

Methanol fires in racing are scary. No flame, no smoke, just burning you.

[–] [email protected] 8 points 1 year ago (1 children)

I had an RC car as a kid with a small combustion engine that used methanol. When I and my friend realised that methanol burns without a flame we got so excited. It brought a new dimension to our army men shenanigans. That and discovering home made napalm.

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

Oh man, the homemade napalm comment really hits home for me. How did you use to make it? My friend always said that it was by melting polystyrene foam in petrol (no heat needed, it simply melts on contact).

[–] [email protected] 1 points 1 year ago

Yeah we used styrofoam and melted it into this weird goo that sticks everywhere. Was dope.

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

New fear aquired

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

I saw that in a documentary recently. Absolutely terrifying.

https://youtu.be/JribVbv6CV4

[–] [email protected] 2 points 1 year ago

Here is an alternative Piped link(s): https://piped.video/JribVbv6CV4

Piped is a privacy-respecting open-source alternative frontend to YouTube.

I'm open-source, check me out at GitHub.

[–] [email protected] 13 points 1 year ago* (last edited 1 year ago) (2 children)

that its black body radiosity has reached into the visual spectrum

Ehm wut.

[–] [email protected] 17 points 1 year ago (1 children)

It gets so hot that it glows. Like how a filament in an incandescent light bulb glows when enough electricity is put through it.

[–] [email protected] 1 points 1 year ago

Thanks for ELI5

[–] DanVctr 14 points 1 year ago (1 children)
[–] [email protected] 3 points 1 year ago

Hot, like how Keke Palmer expresses thermal energy.

[–] [email protected] 6 points 1 year ago (1 children)

I've heard propane is a clean burning gas, I tell you hwat.

[–] [email protected] 1 points 1 year ago (1 children)

"That boy ain't right!"

/)

[–] [email protected] 46 points 1 year ago (1 children)

For the love of all that is holy stop cropping out the artist's watermarks

it is literally more effort to crop out the watermark

[–] [email protected] 14 points 1 year ago

It isnt cropped out is it? There's still some on there at least.

[–] [email protected] 38 points 1 year ago
[–] [email protected] 37 points 1 year ago

Wikipedia rabbit holes at 3 am 🔥

[–] [email protected] 24 points 1 year ago

Me up until 3am, thinking I should go to bed

1:30h documentary on roman concrete later, I'm still thinking I should go to bed

[–] [email protected] 20 points 1 year ago (2 children)
  • Me with the Technology Connections and Legal Eagle YouTube channels lately.
[–] bufordt 10 points 1 year ago

Why did I just spend an hour learning how they recorded audio on VHS?

[–] [email protected] 6 points 1 year ago (2 children)

Technology Connections is the shit! The episode on hurricane lanterns is great and has a stupid joke in there that comes so far out of left field it killed me: https://youtu.be/tURHTuKHBZs

[–] [email protected] 2 points 1 year ago

Here is an alternative Piped link(s): https://piped.video/tURHTuKHBZs

Piped is a privacy-respecting open-source alternative frontend to YouTube.

I'm open-source, check me out at GitHub.

[–] threelonmusketeers 2 points 1 year ago* (last edited 1 year ago)

Is that the one where he says

spoiler textDietz nuts
with a straight face?

[–] [email protected] 10 points 1 year ago (1 children)

Ha, I too had important research to do last night

[–] [email protected] 15 points 1 year ago* (last edited 1 year ago)

We're not talking about that kind of research ( ͡° ͜ʖ ͡°)

[–] [email protected] 8 points 1 year ago

To be fair, it is important to know what is fire.

[–] [email protected] 7 points 1 year ago

*fire is the rapid oxidization of fuel resulting in heat and light.

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

We only research the important things at night

[–] [email protected] 3 points 1 year ago

A few minutes past 3, so he did indeed stay up long.

[–] [email protected] 1 points 1 year ago (1 children)

Here's something I find interesting.

Firstly, the definition from Wikipedia: Fire is the rapid oxidation of a material (the fuel) in the exothermic chemical process of combustion, releasing heat, light, and various reaction products.

For all you bad cooks out there, the reason you can't burn water when you're cooking is because water is already fully oxidized. Water is also often one of those reaction products the definition talks about.

I other words, you can't burn water because it's already burnt.

[–] [email protected] 2 points 1 year ago

Also, in order to have fire you need heat, and water is wonderful at absolving and dissipating heat.

[–] [email protected] -5 points 1 year ago (1 children)

As a physicist, I find I get less confident in my ability to answer questions like this each day.

[–] [email protected] 6 points 1 year ago (1 children)

Probably doesn't help that every consecutive year of physics education is like "anyway everything we taught you last year is a simplification that's technically wrong. Here's how it really works now that you know enough math to understand the next level"

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