Is there a spot where the big bang happened? do we know where it is? Is it the center of the universe? If you go there, is there a net force of zero acting on you in all directions ( gravity) |
- Is there a spot where the big bang happened? do we know where it is? Is it the center of the universe? If you go there, is there a net force of zero acting on you in all directions ( gravity)
- If we can see 13.2 billion light years away with the Ultra Deep Field, does that mean that the universe was that big 13.2 billion years ago?
- The quasar quasar PKS1353-341 is 46 billion times brighter than the sun. What does that mean for the surrounding galaxies?
- Why does a seemingly-small global temperature change, say a couple degrees cause so many changes and why is it so catastrophic?
- Do chimpanzees have unique fingerprints just like humans? If they do, do they also form patterns of swirls, loops or arches?
- Supposing a primordial Black hole of one Earth mass fell into the Earth, about how much time would it take to absorb our planet?
- Why is the color in rain filled clouds so dark?
- How are music instruments sounds affected by a different gravity on another planet?
- Why exactly is speed of light speed limit?
- If glass has no regular crystalline structure, why does tempered glass tend to break into rectangles instead of completely randomly shaped pieces?
- Is it possible to distill in room temperature, just slowly?
- Why is magnetism seen in elements like Iron - but not elements like Carbon or Silicon?
- How aerodynamic are hatchbacks?
- How does unpolarized light work? If unpolarized light is a collection of waves of random polarization and phase, distributed randomly, wouldn’t the electric field at any point add up to zero?
- What is the highest electrical resistance possible?
- Can we expect a decisive answer about the existence of a ninth planet any time soon? Or is progress difficult and slow?
- Do vegans have different gut bacteria?
- What thermal quantity do we sense?
- For how long has animal psychopathology been a field of study?
- Why does the shape of the moon change depending on where you are on the Earth?
- In quantum theory, how do particles get entangled?
- Does keeping a spring compressed cause it to become looser? (This question coming from Nerf, but applies in many contexts)
| Posted: 15 Aug 2018 12:30 PM PDT EDIT: Wow thanks for all of the answers and the support, this is my most popular post yet and first time on trending page of this sub! (i'm new to reddit) [link] [comments]  |
| Posted: 16 Aug 2018 12:28 AM PDT So first let me say I am so excited to find this page, I've been looking for something like this for a long time. So the universe started x number of years ago (13.6 billion?) and so that is the limit of what we would be able to see. Ultra deep field I believe saw up to around 13.2? Billion light years away (essentially 13.2 billion years into the past). And I believe it would have been the same story if it was pointed at a completely different part of the sky. And also would be the same if someone way out there had one pointing at us. Which would make not only everywhere the center, but everywhere also the edge (of the observable universe). So my question/confusion comes in, because doesn't that mean that the universe was that big that long ago? Or even more, what if (theoretically) you leap frogged the telescopes, and we saw 13 billion light years away (13 billion years into the past) and then put a telescope there pointing in the same direction, and so on? I feel like I'm making an incorrect assumption somewhere. [link] [comments]  |
| Posted: 16 Aug 2018 02:53 AM PDT A very bright quasar was found to be obscuring hundreds of galaxies. Quoting from the article:
What does this mean in practice? How far away would you have to be for the light not to be unbearable? [link] [comments]  |
| Posted: 15 Aug 2018 03:28 PM PDT |
| Posted: 15 Aug 2018 08:12 PM PDT Basically just wondering if a chimpanzee could use TouchID on a smartphone. [link] [comments]  |
| Posted: 15 Aug 2018 08:16 PM PDT Pretty much what it says. Supposing there is such a thing, I suppose it would be very small and have a very limited surface to interact with Earth while it sort of orbits around the center of mass in the core. [link] [comments]  |
| Why is the color in rain filled clouds so dark? Posted: 15 Aug 2018 11:38 PM PDT I spent a weird amount of time the other day observing the color of rain filled clouds, and so I was wondering, why are rainy clouds dark grey, when in fact it's conformed of water droplets which are transparent. I thought maybe it had to do with the temperature of the water, but hot water is just less clear than cold water, not darker in any way; so, why are those clouds so dark? Is it because of the way it refracts light? I would really love an answer to this question because it truly does intrigue me deeply. [link] [comments]  |
| How are music instruments sounds affected by a different gravity on another planet? Posted: 16 Aug 2018 01:37 AM PDT |
| Why exactly is speed of light speed limit? Posted: 15 Aug 2018 10:41 AM PDT For so long I have been trying to find explanation to why speed of light is speed limit. The answers that I get are: "Because time stops" or "You would need infinite energy to reach speed limit" or "You can only reach 99.99% of speed of light", other explanations that are formula-a-like contain constants like Planck length or vacuum permittivity which again contain c. I have been stuck in this loop for a long time and I would be very grateful if someone could explain why speed of light is maximum speed limit give me some directions to some videos for graphical explanation or some literature with some formulas that I could plug in numbers. [link] [comments]  |
| Posted: 15 Aug 2018 10:00 PM PDT |
| Is it possible to distill in room temperature, just slowly? Posted: 16 Aug 2018 01:22 AM PDT For instance, you put alcohol in room temperature 'boiler' and then just run the thing through condenser. Wouldn't the alcohol just vaporize making the distillation happen only slowly? [link] [comments]  |
| Why is magnetism seen in elements like Iron - but not elements like Carbon or Silicon? Posted: 15 Aug 2018 08:36 PM PDT I've read that magnetism in elements like iron - is caused by lone electrons in orbitals that spin in 1 direction and that magnetism is merely the cumulative effect of these electrical charges moving through space with 1 spin. But according to Hund's rule, the electron configuration of many elements with 4 valence electrons such as Carbon or Silicon also have their outer orbitals filled with electrons spinning in only 1 direction. So why are elements like Iron magnetic but not elements like Carbon or Silicon? [link] [comments]  |
| How aerodynamic are hatchbacks? Posted: 16 Aug 2018 12:05 AM PDT How do hatchbacks compare with sedans when it comes to induced drag? Which is more aerodynamic, and why? [link] [comments]  |
| Posted: 15 Aug 2018 07:32 PM PDT |
| What is the highest electrical resistance possible? Posted: 15 Aug 2018 02:46 PM PDT Most questions answer this in terms of conductive material such as aluminum vs. rubber etc. What about air? What about a vacuum? I recently bought Corona Dope for an electric fence project that was shorting out, and I was wondering wtf that stuff is made of that it stopped the shorts between two contacts that were arcing in just air. Is this material more resistive than air? [link] [comments]  |
| Posted: 15 Aug 2018 11:23 PM PDT |
| Do vegans have different gut bacteria? Posted: 15 Aug 2018 05:16 PM PDT I know that animals like horses and cows have different bacteria in their GI tracts due to only eating plants and no meat, which is why their manure can be used as fertilizer. If humans eat a strictly vegan diet long enough, do their GI tracts adjust the bacteria in the same way? [link] [comments]  |
| What thermal quantity do we sense? Posted: 15 Aug 2018 07:00 PM PDT Obviously we can distinguish between hot or cold, but what exact physical quantity do our bodies "measure" or sense? For example, temperature, thermal capacity, heat flux, heat rate, etc. I don't think we sense temperature, because a metal at room temperature will feel colder than a nonmetal at room temperature. What thermal quantity do we sense when we touch things? [link] [comments]  |
| For how long has animal psychopathology been a field of study? Posted: 16 Aug 2018 01:33 AM PDT I would assume that ''strange behaviour in animals'' has been studied for quite a while, but not as psychopathologies. I tried to do some googling and the earliest book I could find is ''Origins of Madness: Psychopathology in animal life(1979)'' by J.D. Keehn, but I'm not sure if this is the earliest instance of it. Sorry, I'm not sure if this falls under biology or psychology. [link] [comments]  |
| Why does the shape of the moon change depending on where you are on the Earth? Posted: 15 Aug 2018 01:36 PM PDT For example, I live in England and the moon waxes and wanes in a lateral, sideways motion day to day (so the crescent is shaped in a C). However, I'm currently on the equator and it waxes and wanes upwards and downwards (so the crescent is shaped like a U). I can't quite figure it out. [link] [comments]  |
| In quantum theory, how do particles get entangled? Posted: 15 Aug 2018 01:15 PM PDT I'm trying to understand entanglement, and there are a lot of articles about it, but I have yet to find one that explains how to entangle particles or photons in the first place. To simplify the question, would it be possible to explain how to entangle two electrons, and some of the implications of this. No complex maths, please (I only did physics to A level some years ago). [link] [comments]  |
| Posted: 15 Aug 2018 06:08 PM PDT Let me explain the context from which my question is coming, but ultimately, it is a general question. In Nerf, some blasters use magazines to feed darts. The magazine has a spring, which pushes the darts upward so they can be fed. Some people say leaving the magazines loaded is a bad idea because keeping the spring compressed will cause it to degrade performance. Some say that doesn't happen, or that wouldn't happen in a period of time that relates to play. Similarly, some blasters are spring powered. Again, some people say to not leave the blasters primed where the spring is in a compressed position. Some say it doesn't matter. There seems to be conflicting information in google searches. Some say compression causes deformation, some talk about fatigue limits, elastic regions, and so on. It seems that a lot of people are trying to apply their common sense, but it's not clear whether it works in this case for practical applications. So, does keeping a spring compressed cause it to lose decompression power? [link] [comments]  |
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