Why is it that when you turn on a fluorescent light, it flickers before becoming a stable light source? |
- Why is it that when you turn on a fluorescent light, it flickers before becoming a stable light source?
- Nuclear power plants, how long could they run by themselves after an epidemic that cripples humanity?
- Why is plasma considered the fourth state of matter when it is just gas that has been ionised?
- How is our liver able to regenerate itself, when our other organs cannot?
- Like a Faraday cage for electricity, can we build something for magnetism? If not, why?
- [Biology] In molecular biology, is there an alternative way of separating DNA fragments other than gel electrophoresis?
- Cause of matter's solid nature - Coulomb force or degeneracy pressure?
- How far back, and to what degree of accuracy, can models of the continents of the earth be run?
- When I’m underwater wearing my swimming goggles, they improve my eyesight as if they were glasses. They don’t do this when I’m above water. Why does this happen?
- Why can we not hear what our actual voice sounds like?
- How does frozen food ever go bad?
- What happened to make LEDs so cheap recently?
- If humans can harvest the tides for energy, and tides created from the gravitational push and pull of the moon, but gravity is not inherently energy, then where does the extra energy come from?
- How are old nukes disposed of?
- If temperature is a measurement of the vibration of molecules, then how does the vacuum of space have a temperature?
- Is it logically possible for humans not to have had a mitochondrial Eve?
- As photons have momentum, is light from the sun slowly pushing all the planets away?
- How is heavy water (deuterium oxide) used when making a nuclear weapon and why ?
- Why does encrypting data take much longer than decrypting, if they're both inverse functions of each other?
- Why colonize Mars before the Moon?
- Why does a little salt make ice in a cooler lower its temperature and even refreeze slightly, rather than just melt?
- [Physics] Do I gain mass when i am higher up?
| Posted: 14 Oct 2017 09:01 PM PDT |
| Posted: 15 Oct 2017 07:42 AM PDT We always see these apocalypse shows where the small groups of survivors are trying to carve out a little piece of the earth to survive on, but what about those nuclear power plants that are now without their maintenance crews? How long could they last without people manning them? [link] [comments]  |
| Why is plasma considered the fourth state of matter when it is just gas that has been ionised? Posted: 15 Oct 2017 07:31 AM PDT I mean, what makes it a different type of matter from gas. Also, is plasma the same thing that you get when you atomise an element and then make it undergo either electron affinities or removal of electrons? [link] [comments]  |
| How is our liver able to regenerate itself, when our other organs cannot? Posted: 14 Oct 2017 07:33 PM PDT |
| Like a Faraday cage for electricity, can we build something for magnetism? If not, why? Posted: 15 Oct 2017 07:39 AM PDT Idea is to prevent a magnetic field from affecting an object when placed inside this "magnetic cage". [link] [comments]  |
| Posted: 15 Oct 2017 07:24 AM PDT Cloning DNA in plasmids would be much faster if we didn´t have to use this archaic technology. IMHO, gel electrophoresis, western blots, manual hemocytometer cell counts (and other archaic lab techniques) only survive in the lab because of the high amount of cheap labor (postdocs) available ....but that´s another discussion.... [link] [comments]  |
| Cause of matter's solid nature - Coulomb force or degeneracy pressure? Posted: 15 Oct 2017 07:18 AM PDT I was taught in undergrad that it is the coulomb force that gives matter its solid nature. When you bring macroscopic objects with mass real close together charges repel each other. Charges repelling each other are what happen when we "touch" objects together. But I have seen some claim that it is in fact degeneracy pressure that causes mass to be solid. (I have seen it cited on wikipedia, but can't find it now.) I guess this implies there simply isn't any quantum state that allows the two objects to interleave with each other. The exclusion principle excludes this. I'm confused by this claim because I know that degenerate matter is a "thing", that is - it is distinguished from normal matter. So my first question is in the post title - The solid nature of matter. Does that come from coulomb force or degeneracy? My follow up question - It seems like it may be degeneracy. In this case what distinguishes degenerate matter from regular matter? [link] [comments]  |
| How far back, and to what degree of accuracy, can models of the continents of the earth be run? Posted: 15 Oct 2017 07:00 AM PDT How far back could we 'run the reel' so to speak on how the continents were arranged and what the Earth's surface would have looked like? Are there any events that could take place(naturally) that could effect our predictions, for example a massive natural disaster that altered to course or changed the direction a tectonic plate was moving. [link] [comments]  |
| Posted: 14 Oct 2017 10:43 AM PDT I am nearsighted, so when I take my glasses off and put on my swimming goggles above water the world, predictably, becomes blurry. But under the water the goggles act almost like my glasses, and I'm curious why they do this. I think it has something to do with the refractive index of water/the goggles but I'm not really sure. Thanks! [link] [comments]  |
| Why can we not hear what our actual voice sounds like? Posted: 14 Oct 2017 03:35 PM PDT |
| How does frozen food ever go bad? Posted: 14 Oct 2017 06:08 PM PDT |
| What happened to make LEDs so cheap recently? Posted: 14 Oct 2017 08:49 PM PDT |
| Posted: 14 Oct 2017 12:49 PM PDT In other words, how is kinetic energy created from the gravitational interactions of two objects? Is this not where the energy is actually coming from? Article for reference [link] [comments]  |
| How are old nukes disposed of? Posted: 14 Oct 2017 07:50 PM PDT |
| Posted: 14 Oct 2017 10:57 AM PDT |
| Is it logically possible for humans not to have had a mitochondrial Eve? Posted: 14 Oct 2017 02:28 PM PDT Is a mitochondrial eve a logical necessity for humans given how mitochondria work in the context of human (or mamalial?) (or any) evolution? [link] [comments]  |
| As photons have momentum, is light from the sun slowly pushing all the planets away? Posted: 14 Oct 2017 12:31 PM PDT |
| How is heavy water (deuterium oxide) used when making a nuclear weapon and why ? Posted: 15 Oct 2017 12:46 AM PDT |
| Posted: 14 Oct 2017 06:19 PM PDT For example, it took me around 10-11 hours to fully encrypt my 1TB drive, but it only takes milliseconds to access that data once the password is provided. [link] [comments]  |
| Why colonize Mars before the Moon? Posted: 14 Oct 2017 08:22 PM PDT Just a few thoughts I have had for a while. I've been watching and reading a lot of content on human colonization and the majority of the time it focuses on Mars. Even in the news nowadays it all talks about Mars colonization but what about the Moon? I am no where near a specialist in this field at all but this is what I think. The Moon is closer to the Earth than any other celestial body, it has microgravity, very very very thin atmosphere. To me it would just make more sense to colonize the moon first. Or at least have some type of port to make bigger ships since it will be easier due to the microgravity. Again it's closer to proximity to the Earth so we can shuttle the needed resources back and forth, not to mention we can actually test our capabilities to colonize another body before we put all chips into such a far target. I understand Mars is the target of many peoples dreams but it just seems safer to do it one step at a time. Again I know humans are explorers, risk takers and the bunch but the Moon first just seems as a better step forward in terms of colonization. Just a few thoughts here, I'd like to hear other thoughts on the subject. [link] [comments]  |
| Posted: 14 Oct 2017 11:36 AM PDT Learned this trick from a cook when our fridge died. We filled tubs with ice and sprinkled some salt on the top. Not only did the ambient temperature of the inside of the fridge drop, but there was even ice reforming at the top, despite salt lowering the freezing point. He tried to explain, but I was hoping for a more succinct and eloquent explanation. He said it had something to do with the salt being a heat sink. [link] [comments]  |
| [Physics] Do I gain mass when i am higher up? Posted: 14 Oct 2017 11:36 AM PDT I of course remember learning that you gain potential energy as you rise in the air, equivalent to E=mgh. But since E=mc2, would you gain the slightest bit of mass by at the same time? Follow up question if yes, how would that mass be stored? Is it just stored as energy? [link] [comments]  |
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