Recent comments in /f/explainlikeimfive

Chromotron t1_j6mjqvg wrote

> If the universe as a whole(including outside of the observable universe) then it wasn't a single point, infinite was always infinite and will always be infinite.

This misconception is weirdly common and contradicts basic topology:

If every bubble of, say, 10^10 ly, was once a single point, then the entire universe was once a single point.

Proof: assume x,y are any two points. Connect them by a path of finite (but potentially extremely large, even by universe standards) length. Overlay that path with finitely many of those 10^10 ly bubbles, such that they overlap, forming a "chain". Let A, B be two neighboring overlapping bubbles. Then once all points of A were the same point a, and all of B were once the same point b. But now look at any point p in their intersection: p was once both a and b, thus a=b! Doing this iteratively with the chain of bubbles, we arrive at the conclusion that any two points were once the same! [ ]

And indeed, the infinite(!) 3D (or 4D) space is contractible, it can be contracted into a single point in finite time. Even at locally finite & bounded speed.

Anyway, there are quite a few models of the Big Bang where the universe was always infinite, just with also infinite density at the beginning. The Big Bang needs not necessarily be a single point in the usual sense.

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Pocok5 t1_j6mjprs wrote

  1. Lower power consumption from the CPU and GPU as they don't need to prepare and render that many frames

  2. Lower power consumption from the LCD panel - it takes power to flip the little crystals from transparent to opaque, and generally the faster you want something to work, the more power you need to pump in it, though I think that last part is only relevant if the screen also switches to a slower response time.

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WeirdGamerAidan OP t1_j6miuo3 wrote

When it happens, as soon as I load up the game cpu usage skyrockets to 100 and gpu stays low, and the game runs at like 1 fps. Happens the most with Roblox and Superliminal. I usually have to reload those games several times before it works properly.

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agate_ t1_j6mi3f9 wrote

In the US, towns get their authority from their charter, which is approved by the state legislature when they are formed. The charter will describe and authorize a town police department; the local police get their authority from that.

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The_A4_Paper t1_j6mhu2d wrote

If the universe is infinite then it wasn't a single point, when physicists talk about a "Single point" they usually refer to the "Observable universe" which is finite. in fact when they talk about the "Universe" they usually just mean the observable part.

If the universe as a whole(including outside of the observable universe) then it wasn't a single point, infinite was always infinite and will always be infinite.

The leading idea is that there's no single point but every point in the universe is the center of big bang, a finite volume of space comes from a point and every point expands into a finite volume the size of the observable universe.

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mostlygray t1_j6mhn9g wrote

Ideally the water is coming from a free-flowing aquifer. You dig down a few hundred feet. Sometimes the water is sitting on top of the rock. Sometimes it's below. Sometimes it's in a mix of gravel. It could be 100 feet down, it could be 1,000 feet down. It depends on where the water is.

If the water is from an artesian well, it could be coming from a thousand miles away through the bedrock from the mountains. It could be refilled from rain water that leaks down through the water table. It could be from underground streams.

Unless the water is very shallow, there shouldn't be any bacterial contamination. You test the water to see that it's safe to drink. You're looking for bacteria, heavy metals, pesticide runoff, that sort of thing.

My parents well is about 400 feet down. Through the bedrock. The water is from an underground stream and comes up through the cracks in the rock and keeps the field next door always wet, even in a dry year. The water is high in iron but doesn't have heavy metal contamination to speak off. The copper/nickle is closer to the surface in the clay. The clay is full of iron too. At about 6 feet down, the clay has enough iron in it that a magnet sticks to it. Below that, it's a neutral gray clay that goes down to pea gravel, then bedrock. You can get water out of the gravel, but the refill time would be ridiculous so you pull from below it.

All that clay and rock acts like a filter to keep contaminates out of your drinking water.

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Chromotron t1_j6mhn7u wrote

I have no idea why people down-voted you, this is a perfectly legitimate and pretty good question; some here are just jerks...

Yes, but rarely. And mostly at the end when the star is at its hottest in the center. I don't have numbers on how often it actually happens, but it definitely does.

At the most extreme end in particular, when a star goes supernova (not all do) it collapses so hard to its center that this creates extreme pressure and releases absurd amounts of energy. This fuses iron and all the other stuff beyond all limits; the energy is almost irrelevant, we are talking about hundreds of Earth masses(!!!) as pure energy. This is one of the two processes that creates the elements beyond iron in the amounts we find them (the other option are collisions of neutron stars).

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