Recent comments in /f/explainlikeimfive

Doctor_Expendable t1_j6feyru wrote

There is a lot that goes into it. There's an entire branch of science called hydrogeology that is quite complex. There is a lot of high level math involved in being able to accurately predict groundwater flow.

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deadmanbehindthemask t1_j6fe62f wrote

Our well is 900' deep. At least in this area, the driller said it wouldn't really matter where on the property he drilled (and it is a pretty big property). I get the impression that around here the geology that would dictate where/how deep the water is is on a much larger scale than property boundaries.

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evil_burrito t1_j6fb0o3 wrote

They didn't (and don't) just dig randomly. You're more likely to find water at a lower spot on the terrain than a higher spot. The type and amount of growth is a tipoff, too. Plants like blackberries love water and are a good indicator of an available source, for example.

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KitsuneRisu t1_j6fa2o7 wrote

Unfortunately your question is based on a faulty understanding.

As far as we know, scientifically, the 4th spatial dimension has NOT been proven to exist. The thought experiment that you describe is based on a supposition / assumption of what it would be like IF a 4th spatial dimension DOES exist, but is not itself proof of the dimension existing.

In fact, that very thought experiment answers your question - a 2 dimensional being cannot percieve a 3 dimensional shape more than 'slices of it' as it passes through their lives. A 3D being will similarly not be able to percieve a 4D object except for 'slices of it' as it passes through time in our plane of existance. We cannot see something that we cannot see.

However, why has the 4th Dimension not yet been proven? Well, if it does exist, tl;dr then we would be able to see these 'slices' occuring. Scientists have noted that in tests and particle tests, no matter from our world 'leaks' into any other dimension.

For a much longer but much more detailed explanation, you can read up here:

https://www.forbes.com/sites/startswithabang/2021/06/04/ask-ethan-does-our-universe-have-more-than-3-spatial-dimensions/

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dutchbob11 t1_j6f9t84 wrote

look at the shadow your hand makes on the wall:

that's a 2-dimensional representation of your hand

as seen by a 3-D person

now look at your hand directly:

that's the 3-dimensional shadow of your hand

as a 4-D person would see it

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TheUncannyFoxhound t1_j6f9fgu wrote

Well, classically the fourth dimension is time (height, depth, width, and time would be how you plot where something is in space and time). Which you can't see time, so there's that.

But on the general nature of perception, you can only see within a narrow bandwidth of light, and there are colors outside your perception (like ultraviolet and infrared as a very immediately outside the band examples). You can't see radio waves, radiation, etc. The same is true for each other sense you have. Thus, it's "possible" an entire world that we can't perceive exists.

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Ratnix t1_j6f91og wrote

And just what do you think is going to happen to weather patterns when you start removing and building new mountains?

All you're going to do is move the location of the weather somewhere else. And that will effect the weather all across the world.

You might be able to make a small local change, but you could screw up the weather for a much larger area.

That's all assuming it was even something that humans could do in the first place.

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shinysnake727 t1_j6f8s87 wrote

A fourth dimension doesn’t exist in the way you’re imagining it.

Forward and back is 1 dimensional like a line, adding left and right make it 2 dimensional, and adding up and down makes it 3 dimensional. There isn’t another spatial dimension like another direction you can go. Any direction you can go is a combination of forward, back, left, right, up, and down

Many consider time to be the fourth dimension and you obviously can’t “see” time like you can see and wrap your head around the 3 spatial dimensions.

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