this post was submitted on 02 Dec 2024
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Science Memes

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[–] [email protected] 1 points 13 minutes ago

Maybe it desintegrated and thus vanished from the consecutive frame?

Atomic blasts are kind of powerful versus an iron lid.

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

Man. I haven't seen an ifunny logo in so long. Are people still on it?

[–] [email protected] -4 points 2 hours ago (1 children)
[–] [email protected] 1 points 8 minutes ago

Don't use gpt to fact check.

[–] [email protected] 11 points 11 hours ago (2 children)
[–] [email protected] 12 points 11 hours ago (1 children)
[–] [email protected] 3 points 11 hours ago

Definitely easier to read thx

[–] [email protected] 1 points 11 hours ago* (last edited 11 hours ago)

ifunny.c😀

[–] [email protected] 6 points 13 hours ago (1 children)

The Parker Solar Probe moves 120 miles per second as it passes around the Sun. That's nearly half a million miles per hour!

https://en.wikipedia.org/wiki/Parker_Solar_Probe

[–] [email protected] 3 points 6 hours ago

Parker Solar Probe: 191 km per second.

Nuclear Manhole Cover: 55 km per second

Voyager 1: 17 km per second

Voyager 2: 15 km per second

[–] [email protected] 22 points 21 hours ago* (last edited 21 hours ago) (1 children)

Nope, it would just have bursted due to thermal schock and pressure. Escape velocity, what are you dreaming, is the lid made of tungsten?

[–] [email protected] 8 points 15 hours ago* (last edited 15 hours ago)

This is the origin apparently.

RRB: "My calculations are irrelevant on this point. They are only valid in speaking of the shock reflection." Ogle: "How fast did it go?" RRB: "Those numbers are meaningless. I have only a vacuum above the cap. No air, no gravity, no real material strengths in the iron cap. Effectively the cap is just loose, traveling through meaningless space." Ogle: And how fast is it going?" This last question was more of a shout. Bill liked to have a direct answer to each one of his questions. RRB: "Six times the escape velocity from the earth."

[–] [email protected] 14 points 21 hours ago

Surprised no one has posted this but Kyle hill made a video on it

[–] [email protected] 7 points 19 hours ago

How to solve the Three Body Problem.

[–] [email protected] 60 points 1 day ago (7 children)

Ummm, not sure where they got these numbers from but Earth's escape velocity is not 7000mph and escaping the sun's gravitational pull (leaving the solar system from Earth) is not 30,000mph. Respectively the numbers are approximately 25,000mph and 94,000mph. You're welcome.

[–] [email protected] 3 points 12 hours ago (1 children)

That's 11.2 km/s and 42.1 km/s.

Also, even if the manhole cover was going at above 12 km/s the trajectory has to be right for that to result in orbit. Most paths it would take would result in it going up and then coming back down again. Similarly, if somehow it did manage more than 50 km/s and wasn't destroyed in the atmosphere, it might have the velocity to escape the sun's gravity, but probably wouldn't be on the right path to do it. Most likely it would fall into the sun.

So, assuming the 125,000 mph (55 km/s) velocity is correct, the most likely outcome is that it was a reverse-meteor, something that burned up going up through the atmosphere, not down. And even if it did have enough speed to get out of the atmosphere, and there was enough of it left, it most likely fell right back down through the atmosphere somewhere else, either burning up on re-entry or hitting the ground (or the water) somewhere else.

[–] [email protected] 2 points 3 hours ago (1 children)

Ignoring that it burned up and ignoring losses due to drag if it somehow didn't. Isn't the point of escape velocity that it explicitly won't come back down.iar least not on earth. Your trajectory won't matter as you have enough velocity to escape the gravity of earth and will orbit the sun. Further if you managed the solar system escape velocity you will end up orbiting the galactic core. Trajectory doesn't matter if you have escape velocity. Correct trajectory just minimizes the delta v needed to reach that escape velocity.

At least that's all my recollection.

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

Escape velocity means you could stay in orbit. It doesn't guarantee anything if you launch at the wrong angle.

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

Gotta love Tumblr. Just massive amounts of disinformation and bullshit all the time.

[–] [email protected] 2 points 17 hours ago (1 children)

I like how they are implying the speed of light is only 500000mph (as opposed to 671,000,000 mph or 1,080,000,000kph)

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[–] [email protected] 7 points 21 hours ago* (last edited 13 hours ago)

Most likely it just evaporated, or disintegrated or something, but I think its pretty unlikely it survived that absolutely bonkers acceleration.

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