Science!! Fucking magnets, how do they work?

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Cad

scientia potentia est
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No. If we did not understand it at all we wouldn't know the constant of gravity on Earth and would not be capable of putting satellites in orbit or any number of less complex tasks.
Understanding its practical effects and understanding how it works are different things. Even in Roman times they were able to accurately aim projectiles based on calculating gravity's effect, even though they had no idea what gravity even is.
 

ZyyzYzzy

RIP USA
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Understanding its practical effects and understanding how it works are different things. Even in Roman times they were able to accurately aim projectiles based on calculating gravity's effect, even though they had no idea what gravity even is.
You used only "understand".
 

Alexzander

Golden Knight of the Realm
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Understanding its practical effects and understanding how it works are different things. Even in Roman times they were able to accurately aim projectiles based on calculating gravity's effect, even though they had no idea what gravity even is.
Relativity has been proven correct in enough applications that it's reasonable to claim we understand the big picture of how gravity works. Admittedly we still have to work out the details though.
 

iannis

Musty Nester
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Oh right. Escape velocity. Vodka is even worse at science than I am.
Even worse.

Light will always move by the shortest possible path between two points. The shortest possible path is not always a straight line, in fact it is often some sort of curve or arc or squiggle when you consider a large enough context. But in the case of black holes the path is actually a circle/closed loop.

And that just doesn't make any fucking sense. But that's never been a counter argument to anything.
 

Cad

scientia potentia est
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Relativity has been proven correct in enough applications that it's reasonable to claim we understand the big picture of how gravity works. Admittedly we still have to work out the details though.
I won't disagree that relativity is by far the most correct model of gravitation we have so far.

The devil is in those details though.
 

Ambiturner

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Even worse.

Light will always move by the shortest possible path between two points. The shortest possible path is not always a straight line, in fact it is often some sort of curve or arc or squiggle when you consider a large enough context. But in the case of black holes the path is actually a circle/closed loop.
Not sure exactly what you're getting at, but light always travels in a straight line from the light's perspective.
 

iannis

Musty Nester
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I thought that's what I said.

DID I FUCKING STUTTER?

To be fair maybe I didn't. But yes, exactly. I guess that's where the relativity comes in. Relative to where you happen to be standing, that line might not look straight. But that shit's straight. Unfuck your eyes.

Edit: That might sound like a philosophical parlor trick, but it's an important perceptual shift. More important because it would seem that it happens to be true. Even if it was just a clever lie, it would be a useful lie.
 

Cad

scientia potentia est
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I guess what I want to see from an understanding of gravitation is not just a model or set of equations that can predict behaviors, but I want to know the how and why gravity works. Accurately predicting its effects is just the start.
 

Alexzander

Golden Knight of the Realm
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Relativity breaks down on the galactic and sub atomic scales
Right, hence the details that need to be worked out.

The general model of gravity being the effect felt by spacetime being warped by mass still seems to hold true in the big picture. Uniting that with quantum mechanics is big prize in the realm of physics. I think that most of us reading this thread have the gist of that.

My general point is we do appear to understand some things about gravity. It does not seem that we completely fail to understand the causes of it.
 

ZyyzYzzy

RIP USA
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Relativity and our equations do break down on those scales. Calculated vs observed velocities of stars on outer edges of galaxies is one example.
 

iannis

Musty Nester
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Including the lecture is a real white thing of them to do.

Gonna listen to it cause it kinda sounds like hokum. I imagine that it makes sense, but it does sorta sound like semantic hokum.

Edit: I've only listened to 20 minutes of it, but the guy is like Sheldon Cooper IRL. So awkward. And his laugh... oh lord, his laugh. I've never heard one like it. But his lecture is obviously tailored to be accessible to laypeople. Unfortunately he uses a lot of words to say very little, and what he's saying of substance is hinging on assumptions which he brushes over but treats are provable fact so I have to assume that I'm just not educated enough to honestly understand his argument. 60-70 minutes seems to be theactualmeat of the discussion. My takeaway was: The past is both deterministic and predetermined, if other states exist they are inaccessible to us.

And people say quantum theory is counter intuitive. That's the most intuitive thing in the fucking world.
biggrin.png
 

Deathwing

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Seriously?

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Darn, the image hotlinking won't work. My car engine looks higher tech than that thing, and all it does is combust gasoline.