If e=mc^2, does that mean that the sun is constantly losing mass through radiated energy? |
- If e=mc^2, does that mean that the sun is constantly losing mass through radiated energy?
- If elements above 83 (+43, 61) are all man made, is it strictly impossible for them to appear in nature?
- What are the physics behind Iron being the threshold of endothermic/exothermic nuclear fusion/fission?
- In most photos of galaxies there seems to be a bright central core. Is that just some giant star or a huge mass of them?
- If the speed of light varies according to the "medium" it travels trough, fastest being "vacuum", is it theoretically possible that it could be more than 299792458 m/s in some "theoretical exotic medium"?
- For an extinction event-sized meteorite (e.g. the one that caused the Chicxulub crater, ~10km), how long would the object be visible in the sky before impact?
- How does gene therapy/crispr affect every single cell in the body?
- Are roaches in human dwellings more, less, or just as common today as in the past?
- What is the estimated size of proto-Earth before it was impacted by Theia?
- In the 'empty universe' thought experiment, how long would it take for the two protons to collide?
- Does mass increase when temperature increase?
- So the sun has been 'burning' for billions of years and has a couple billion left, what is it that keeps all this fuel in one place for such a long time in such a stable formation? Why doesn't it all just explode or break itself apart or do something else in a small amount of time?
- Why, after it has been raining, is there nearly always very dense mist over forested areas?
- Is there a correlation between the quality of water people drink and the amount of kidney stone cases?
- What is the hilbert space of two interacting systems?
- How do railguns work?
- How representative is the composition of our solar system versus the composition of known exoplanets?
- How many trees would I have to plant to offset the carbon dioxide emissions of a 24 hour plane trip?
- If I had a pane of diamond thick enough, would the world appear to be moving slower as I looked through it?
| If e=mc^2, does that mean that the sun is constantly losing mass through radiated energy? Posted: 05 Sep 2016 01:01 PM PDT Assume that there is no ejected particles, just emitted radiation. Would such a body be losing mass? [link] [comments]  |
| Posted: 05 Sep 2016 02:17 PM PDT Watching some Scishow talk about the 'end' of the periodic table and wondering if it was impossible for these supermassive atoms to exist on their own (if, perhaps, for a fraction of a second) [link] [comments]  |
| Posted: 06 Sep 2016 03:34 AM PDT |
| Posted: 05 Sep 2016 12:13 PM PDT this is just some thing I have noticed looking at all the gorgeous images we have from the Hubel telescope. [link] [comments]  |
| Posted: 05 Sep 2016 07:49 PM PDT Apparently vacuum means "void of matter". But apparently, matter makes only about 5% of the Universe. What if we could have a "medium that is void of matter AND void of dark matter? Or since matter is just another incarnation of energy, what about "medium" void of matter, dark matter AND dark energy, let's call it "dark vacuum" (trademarked by u/asmj)? [link] [comments]  |
| Posted: 05 Sep 2016 08:32 AM PDT |
| How does gene therapy/crispr affect every single cell in the body? Posted: 05 Sep 2016 02:50 PM PDT Whether its by a viral vector or crispr, I understand how they alter DNA but I don't know how they manage to get delivered to every cell. If one cell is altered, does the genome of every cell change? What exactly happens? [link] [comments]  |
| Are roaches in human dwellings more, less, or just as common today as in the past? Posted: 05 Sep 2016 09:07 PM PDT |
| What is the estimated size of proto-Earth before it was impacted by Theia? Posted: 05 Sep 2016 04:56 PM PDT |
| In the 'empty universe' thought experiment, how long would it take for the two protons to collide? Posted: 05 Sep 2016 11:49 PM PDT I've seen on Reddit the view that two protons say 14 billion light years apart but in an otherwise completely empty universe would eventually collide through gravitational attraction. Is there a way to coherently calculate how long that would actually take? Let's say they're initially motionless relative to one another. Perhaps longer than things like spontaneous quantum tunnelling to occur (see https://en.m.wikipedia.org/wiki/Timeline_of_the_far_future - one of my favourite wiki articles) Doesn't the above imply that the gravitonal field of each extend for 14 billion light years (and therefore perhaps infinitely)? Is the effect somehow instantaneous or would it presumably be subject to the speed of light? I love this sort of stuff! [link] [comments]  |
| Does mass increase when temperature increase? Posted: 06 Sep 2016 02:35 AM PDT To heat water (ignoring mechanical forces and phases transitions), you have to give it energy: E = M Cp dT. But energy is also mass: E=mc². So does the mass of a body isolated from the outside gain mass when heated? I did the maths for 1000m3 of water, the supposed mass variation from 10°C to 90°C is 3.7 mg. I guess it is big enough to have been measured with something more stable than water. [link] [comments]  |
| Posted: 05 Sep 2016 04:43 PM PDT Is it just the gravity and balance of the whole system that keeps bringing the 'spare' hydrogen into the centre much like throwing logs on a fire? If the gravity is keeping all the hydrogen in a big ball, why doesn't it all react at once or very quickly? [link] [comments]  |
| Why, after it has been raining, is there nearly always very dense mist over forested areas? Posted: 06 Sep 2016 01:00 AM PDT There is quite a large forest near my house on some mountains, and whenever there is rain I can always see very thick mist/fog over the forest. Is this to do with transpiration or something else? [link] [comments]  |
| Posted: 05 Sep 2016 08:39 PM PDT I recently joined a research team at my university. We are studying the water quality in different parts of South Carolina and how/if it relates to the number of kidney stone cases. We are mainly concerned with the "hardness" of the water, or the amount of calcium and magnesium. I have seen studies online that have concluded that less calcium in a diet actually leads to more cases of kidney stones, which I was surprised by. Does anybody have an explanation for this, or have any insight to help us with our study? Thanks [link] [comments]  |
| What is the hilbert space of two interacting systems? Posted: 05 Sep 2016 09:44 AM PDT Is the hilbert space of a system which consists of two intertacting subsystems the tensor product of the hilbert spaces of each subsystem? I would think not, since the elements in such space represent all the possible combinations of states of both systems. Is it a subspace of such space? Is it something completely different? [link] [comments]  |
| Posted: 05 Sep 2016 12:26 PM PDT I know that railguns use magnetism and something called the Lorentz force to propel things but how exactly does that all happen? Does anyone have any papers on it? [link] [comments]  |
| Posted: 05 Sep 2016 12:46 PM PDT For instance, is a large gas giant like Jupiter representative of other gas giants? Are gas giants typically located towards the out portions of the solar system? Do rocky planets tend to have atmospheres like Venus and Earth or is Mars a more representative example? [link] [comments]  |
| How many trees would I have to plant to offset the carbon dioxide emissions of a 24 hour plane trip? Posted: 05 Sep 2016 09:14 AM PDT |
| Posted: 05 Sep 2016 08:55 PM PDT I recently learned about refractive indices and their correlation to the reduction of the speed of light through a specific medium in a vacuum. Through some quick research, I discovered that diamond has a refractive index of 2.42, and that puts the speed of light at 59% slower as it travels through the diamond. So as my question desires: would it be possible to view "real-time" through a pane of diamond and have it appear at a slower pace? How thick would that pane of diamond need to be and is there an equation to calculate it? Or would the pace of "real-time" still appear the same, only it reaches the other end of the diamond pane at a later time? [link] [comments]  |
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