First, neutrons hitting the nucleus of most atoms will either do very little or will actually use up energy. Only "fissile" materials will generate more energy, such as some forms of uranium and plutonium.

When an explosive chain reaction happens, two things cause it to end quickly:

1. The fissile atom's nucleus changes when it releases energy. The atom becomes a different element. The elements that result are non-fissile. As a result, the fissile material is used up, leaving no fuel for the chain reaction.
2. In order to have enough neutrons hit other atoms in the fissile core, that core has to be pretty dense. When the explosion happens, the fissile material spreads out in a cloud of superhot plasma. This plasma is not dense enough to maintain fission.

Because farming equipment requires more torque than horsepower. This torque is usually provided from diesel engines and special gear ratios.

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Remember when USB started rolling out around the time of Win95 OSR2.1?

Seems like a perfect ELI5 answer! Well done

It's more like, there is neither without the other. You can't move in space without moving in time, and vice versa.

So, my slightly-headache-inducing answer: if the universe is infinite in size, then the ring is traveling through space-time just like we are. If space is finite, then the ring just hasn't reached the 'boundary' of whatever spacetime object we're contained in (what happens when it gets there is a question I'll happily leave to philosophers and quantum physicists).

In either case, there must be space for the ring to occupy while it travels, which necessitates the existence of time outside the ring.

You don't understand because this entire concept is wildly far beyond anything humans were ever meant to understand. Maybe the only satisfying answer to this kind of question is coming to peace with the fact that we'll likely never have a satisfying answer.

The CMB is not a ring, it is everywhere and can be seen in every direction. It fills the whole universe like water fills the whole ocean. The CMB comes from the time of the early universe, when the universe more dense and every part of space was filled with hot glowing matter. As the universe expanded the matter cooled off and stopped glowing but the light from that glow continues to spread in all directions.

Chatgp wrote this? Sure smells like it.

The speed of light only applies to matter and energy. Space is free to expand at any speed, it does not have any limit (that we know of). Yes there are galaxies beyond the cosmic horizon that are still coming into view. Although since galaxies are hundreds of thousands of light years across, it therefore would take that much time for one to come into view. We don't know how big the universe is but we do know it is at least several times bigger than the observable universe.

I think my comment may not have been clear enough. There was only 1 big bang. There isn't another universe expanding towards us. This is all talking about one universe.

Imagine that the universe is represented by the skin of a balloon (just the 2d skin, not the internal volume). Cover the balloon with dots and pick one to call Earth. As you blow the balloon up, all of the dots will get farther from the earth dot, but the change in distance will be smaller for the near dots than the already far dots. Now imagine there's a speed limit for moving between the dots. If the rate at which the distance to the far dots is increasing is faster than that speed limit, you can never get from the far dots to the Earth dot.

Thanks. Good news Cubert, that helps tremendously 😁. You're name is the bee knees btw. Whimmy wham wham wazzle

The thing is - from the perspective of the unverse as it is now, the Big Bang happened everywhere all at once. You are right where it happened - but then, so is absolutely everything else as well. And all of it was packed incredibly close together* at the time. There's no "expanding ring of light" - the light started from everywhere, heading off in all possible directions, and is still going, just moving between places that were all close together at the time. Some of the light started off in your living room, and is still heading outward; but plenty of light from other places is reaching us from every direction as well.

2D analogy. Imagine the surface of a balloon. It's an incredibly small balloon when it's not inflated, but it's also incredibly stretchy. Suddenly, it starts growing - and as it does, thanks to the marvels of thought experiments, as each point of the surface starts to stretch, lots of sparkly light goes shooting off from that point in all directions along the surface. But the whole balloon is stretching, so the light is coming from everywhere, going everywhere. A couple of hours later (or maybe 14 billion years) the balloon is still getting bigger, and its whole surface is still chock full of sparkly light heading in every direction. There's no "expanding ring" - the light started out everywhere, heading everywhere.

Put back in the context of the universe, that's what we see - the Cosmic Microwave Background. Light from all over the place, that just happens to be passing here right now.

*"Incredibly close together" is as far back as we can go. There's a point where everything is so close together that our current models of the way the universe works simply break down. What happens before that is, basically, currently unknowable.

>The material biconditional is the same as the equivalence sign.

Did you read https://math.stackexchange.com/q/2432462 posted above? It, and https://math.stackexchange.com/q/2649394, disagree with you?

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Oh, thank you. That makes it actually make more sense. I'm thinking as there was only 1 big bang. So our light wouldnt reach them, but that doesn't mean there's nothing. Like you said they're light wouldnt reach us either. So there isn't nothing just another universe expanding toward us. Theoretically of course. It was the concept of nothing that had my brain messed up.

You aren't the only thing that eats it. You are full of bacteria which CAN break down, but not in the same way your lactase does... it doesn't care that it spits out a bunch of byproduct gas. That gas causes inflammation in your gut and all the symptoms you are mentioning.

AFAIK, your choices, as far as "general impact resistance", are either in-mold or injected foam - basically, one-time-hit that doesn't do much for small hits but takes a hard hit well versus meant to the small hits regularly but doesn't do as well in a hard hit.

You toss both after a good hit, but the former is lighter and meant for those riding in ways that don't expect a fall but want protection in case of the worst, while the other is for skiers expecting to fall, like air or pipe skiers/snowboarders.

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>However, it is possible that there are areas of the universe where light has not yet reached us, and we cannot observe them yet.

Depending on the cosmological model you subscribe to, there are instead areas of the universe whose light will never reach us (assuming expansion continues), and we will never be able to observe. And areas where light from the past was able to reach us, but light emitted now will never be able to reach us.

For objects beyond a certain distance, the expansion rate of the universe is such that the distance between us and the object increases at a rate greater than the speed of light, meaning that photons emitted by that object will not reach us in finite time. (This does not mean anything is moving faster than the speed of light, to be clear.)

Someone said below it's different, it's an expansion which is (distance/time)/distance. Which would make everything kinda make sense but I'm awaiting a better explanation of that cause my brain can't grasp it. Is there time outside the ring, or if that explanation is true, there is not distance but only time?

It's one of the few immediately hittable features with a lasting sensory effect. I've never been punched in the tongue, but i imagine it would feel different from most other places.

I think it has to do with the fact that when you're hit in the nose, you experience all the other normal "getting hit" effects, but in combination with them, there's also the way it affects your smell perception and the way your brain processes non-smell signals as smells. There are a lot of nerve endings in that area the typical of which is interpreted as smells or nuances of smells, and after a hit they're firing due to swelling, damage, etc.

Yeah, what he was describing was what got me down the rabbit hole. We can never know if ours is the only big bang. Not that we can theoretically never know. We literally can never know.

I'd hazard a hypothesis and say it's because of the noses extra pressure sensitivity, when your nose is hit (the outward center of your sinuses, which connects either directly or indirectly every sensory organ in your head) the rapid pressure change is sensed along with the standard impact and pain. whats happening is two senses are being activated at once, versus being punched in the side of your face really only activates one type of sense, being "standard" pain, think of it like when you're eating and you can smell the food so the food is far more delicious. When you cannot smell the food you are eating, the flavor is much more mild and the experience is less rich because only one sense is being activated. when both are activated your brain combines the sensory information into one experience and makes it far more enjoyable, same with the nose being hit, two senses versus one being activated, so the experience is far stranger and almost has a third "dimension" to the pain.