this post was submitted on 19 Nov 2024
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[–] [email protected] 22 points 1 day ago

Those men are just very good friends.

[–] [email protected] 86 points 1 day ago* (last edited 1 day ago) (5 children)

I know this is a joke but if anyone is wondering it's because they build those things to go towards the air, otherwise they would be going away from the air and it would be hard to breath. Earth is going away from the air too but luckily it has trees attached to itself that make more air and leave it behind, that's where wind comes from.

[–] [email protected] 20 points 1 day ago (1 children)

Who are you, who are you so wise in the ways of science?

[–] [email protected] 4 points 1 day ago (1 children)
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[–] [email protected] 7 points 1 day ago

i'm taking a meteorology class and can confirm that this is how wind works.

[–] [email protected] 20 points 1 day ago (1 children)
[–] Texas_Hangover 12 points 1 day ago

Calvin's Dad over here.

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

Im sure going against the force of gravity vs gravity pull to the earth has a lot to do with it too.

[–] agamemnonymous 3 points 1 day ago
[–] [email protected] 35 points 1 day ago (1 children)

I'm appalled at the amount of people in this comments section who failed elementary grade school level of physics and also somehow failed to notice this is the shitpost community

[–] [email protected] 2 points 23 hours ago* (last edited 23 hours ago)

It's not...

Maybe it was supposed to be, but it's just a regular meme sub

[–] [email protected] 118 points 1 day ago (2 children)
[–] [email protected] 15 points 1 day ago

Yes, now out with your deeply ingrained racist ideologies or I'm gonna sic gran on you.

[–] [email protected] 81 points 1 day ago (6 children)

1675 + 10km/h

1675 + 100km/h

1675km/h

Turns out that 1675km/h is the magic number, anything above that is dangerous

[–] Habahnow 40 points 1 day ago (3 children)

I'm a leading scientist on speed, and this is the answer.

[–] [email protected] 28 points 1 day ago (2 children)

They let scientists do drugs?

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

Who do you think invents the drugs?

[–] [email protected] 4 points 1 day ago* (last edited 1 day ago)

Can confirm. Heisenberg invented meth, saw a documentary about it.

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

I remember learning that before the invention of the locomotive, people thought that 30mph was some kind of barrier that the human body could not survive.

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[–] [email protected] 41 points 1 day ago (1 children)
[–] [email protected] 50 points 1 day ago (8 children)

Not quite. When you're rotating, you are constantly accelerating in a tangent direction to the diameter. So the poster is right that we should be feeling a force shooting us away from the center of earth.

Except the force of gravity cancels out the centripetal force and then some.

So [force of gravity] - [centripetal force of Earth's rotation] = 9.8m/s^2

[–] [email protected] 24 points 1 day ago (6 children)

The difference is about 0.5%. A mass weighing 100kg at the north pole would only weigh 99.5kg at the equator. Most of the difference is the centerfugal force of the earth's rotation.

I've not checked the numbers, but apparently it's detectable in Olympic sports. More height records get broken at equatorial latitudes that higher ones.

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[–] [email protected] 19 points 1 day ago (1 children)

If you want to just pick the fastest velocity we can measure and we're currently moving at thanks to dark energy the Milky Way galaxy is moving away from other distant galaxies faster than the speed of light.

[–] [email protected] 5 points 1 day ago (1 children)
[–] [email protected] 1 points 21 hours ago

I thought so too but it ended up just being an encumbrance of vapors

[–] [email protected] 17 points 1 day ago (6 children)

Man, it'd be so funny if the entire atmosphere just straight up locked in place. Heck, forget rotation, have it keep it's X/Y/Z in the universe static and just straight up disappear as our solar system moves on.

[–] [email protected] 11 points 1 day ago (1 children)

Xkcd kinda did a video on it except the earth is the one that stopped. It's pretty much exactly the same result though

https://m.youtube.com/watch?v=gp5G1QG6cXc

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

Ik this is a joke but if anyone is wondering it's because units of linear motion (km/h, mph, etc.) do not accurately describe rotation. Rotational units like rpm are much better as linear units give a misleadingly large (though technically correct) number.

[–] [email protected] 21 points 1 day ago (1 children)

If anyone is wondering it's actually because of frame of reference. The first two images have speeds in relation to the rotation of earth, the last imagine uses a different frame of reference. If you put the last image in the same frame of reference as the first two images the number there would be 0km/h, because it would be moving in relation to itself.

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

It's actually because the thing that makes you make those faces is the acceleration, not the speed.

All three reference frames shown are accelerated, non inertial frames. But the first two have "fictitious" centrifugal accelerations somewhere around 0.5-2.5 g. The third frame has a detectable centrifugal acceleration, but it's like 0.003 g or something, and can be lumped in with gravity for many types of problems.

[–] beastlykings 11 points 1 day ago

It's actually because of wind resistance, the air is moving the same speed as the ground when the earth turns so you don't feel it.

(don't @ me I'm just following what I recognized to be a humorous pattern of technically correct "well actually"s)

[–] [email protected] 13 points 1 day ago (2 children)

Maybe my math is wrong but: The Earth's radius is about 6,371 kilometers. With this large radius and a 24-hour rotation period, the centripetal acceleration at the equator is only about 0.034 m/s². This is tiny compared to Earth's gravitational acceleration of 9.8 m/s². So the centripetal effect is only about 0.3% of gravity's effect.

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[–] [email protected] 12 points 1 day ago

That's cause earth isn't actually rotating at all. The entire universe rotates around earth.

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

Wait, so if I drive fast enough I get a nice picnic meal?!?!

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

Maybe, if there are nice picnic meals in Heaven.

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