- Uranus' axis is rotated onto its side, meaning it spins "up and down" instead of "side to side". Does this different rotation have a significant effect on the planet's climate? Could an earth-like planet with that sort of rotation sustain life if all other conditions were ideal?
- Will planting trees offset my cars carbon emissions?
- What determines how a drug is administered (e.g. orally, anally, injected)?
- Why does an oil/soap film look colored due to interference when everyday light is not coherent?
- Quarks can change flavours but can they change colour?
- Is there a limit to how long a radio wave can be? Would extremely long waves be of any use?
- What's the maximum height a fly or a mosquito can reach?
- Does the severity of an anaphylactic response increase with each exposure to an allergen?
- Why do our bones regenerate?
- Can I use two point sources to accurately simulate a bar magnet?
- If a photon is emitted and absorbed by high-level and low-level electrons respectively, is it stored in the electron and drawn out or does it just pop into existence? If it just pops into existence, where does that energy come from?
- Why does staring at a fixed point in a dark room create the illusion of blindness?
- Would we be able to differentiate between an engineered biological weapon and a natural super-virulent flu?
- Gravity on an ellipsoid?
- What is actually happening when helium affects the sound of our voice?
- Why do songs get stuck in our head?
- Why does faster than light travel equal time travel?
- Does putting alcohol into a fancy looking decanter necessarily make it taste better?
- How do different nuclear bombs fuse or fizz materials?
- In what cases would you want a leading vs. a lagging power factor and vice versa?
- Considering the relative nature of velocity, are momentum and inertia the same thing?
| Posted: 02 Nov 2017 10:08 PM PDT |
| Will planting trees offset my cars carbon emissions? Posted: 03 Nov 2017 04:22 AM PDT |
| What determines how a drug is administered (e.g. orally, anally, injected)? Posted: 02 Nov 2017 08:44 PM PDT |
| Why does an oil/soap film look colored due to interference when everyday light is not coherent? Posted: 03 Nov 2017 01:55 AM PDT |
| Quarks can change flavours but can they change colour? Posted: 02 Nov 2017 08:18 PM PDT I know that weak interactions can change quarks' flavour but now I'm wondering can the weak force or any force that is applied to it, can it change the quarks colour? Because in QCD it says that the total colour of a particle has to be white so all its quarks have to, once 'combined', equal white but could a force change one of the colours and therefore turn the whole particle from white to another colour and therefore break the particle apart? if that makes any sense? I hope someone understands me because I think I explained my reasoning poorly! Thanks a lot in advance! [link] [comments]  |
| Is there a limit to how long a radio wave can be? Would extremely long waves be of any use? Posted: 02 Nov 2017 06:54 PM PDT |
| What's the maximum height a fly or a mosquito can reach? Posted: 02 Nov 2017 02:33 PM PDT I mean flying of course! Is there a limit? How high is that? Why? [link] [comments]  |
| Does the severity of an anaphylactic response increase with each exposure to an allergen? Posted: 02 Nov 2017 06:17 PM PDT |
| Posted: 02 Nov 2017 04:35 PM PDT In the wild, animals don't have the option to set their bones back into place. So why have our bodies evolved to bother allocating energy into bone regeneration? [link] [comments]  |
| Can I use two point sources to accurately simulate a bar magnet? Posted: 02 Nov 2017 04:27 PM PDT I'm trying to write a magnetic simulator in a video game engine that lets magnets attract and repel each other in zero gravity. So far, in order to avoid integrating over the length of the magnets, I have the code written to represent bar magnets as two different 'monopoles' (a North and a South) at a fixed distance from each other. It's delightful to watch these pairs spin around, repel and attract each other, but I really am not sure if this is an accurate approximation of how this would really play out in space with bar magnets... Am I accurate as is? Or will I need to start over with full bar integration? [link] [comments]  |
| Posted: 03 Nov 2017 01:19 AM PDT I was reading a book by Kauffmann titled Discovering the Universe in which he states that high-level electrons create photons and low-level electrons absorb them. I was wondering if photons exist independently from electrons or if they are part of them, and if they are independent where does their energy come from? [link] [comments]  |
| Why does staring at a fixed point in a dark room create the illusion of blindness? Posted: 02 Nov 2017 07:20 PM PDT Staring at a fixed object in a mostly dark room will lead to the object fading out slowly in your field of view. Why does vision become impaired when the point of reference remains stagnant? Why does the autokinetic effect on the eyes work in well lit areas, but not as well in dark areas? [link] [comments]  |
| Posted: 02 Nov 2017 11:09 AM PDT Let's suppose some country uses modern gene editing techniques to engineer a new hyper-virulent, deadly flu virus. Would scientists be able to positively identify genetic engineering within the virus, or would it be indistinguishable from a naturally mutant virus? I realize that the flu isn't necessarily the best example of a biological weapon, but it might be able to "slip under the radar" more successfully than antibiotic resistant plague. [link] [comments]  |
| Posted: 02 Nov 2017 08:54 PM PDT Say you're walking around an elliptical planet. It's a magical planet, and isn't rotating, yet retains its elliptical shape. Give it a mass and mean radius equal to earth. Here are my questions, based on this diagram: 1) Which point has a stronger gravitational pull towards the center, point A or point B? Point A is closer to the center of mass, but B has more mass directly beneath it. Are the forces equal for this reason? Or does the inverse square law make point A the winner? 2) What is the magnitude and direction of point C's gravitational pull relative to point A and B? What would it be like to be standing on this point? 3) How do these questions change as the eccentricity of the ellipse increases/decreases? Thanks! [link] [comments]  |
| What is actually happening when helium affects the sound of our voice? Posted: 02 Nov 2017 06:56 PM PDT |
| Why do songs get stuck in our head? Posted: 02 Nov 2017 01:53 PM PDT |
| Why does faster than light travel equal time travel? Posted: 03 Nov 2017 02:54 AM PDT Hello! I'm an aspiring novelist currently writing a science fiction piece. I'm a stickler for scientific accuracy, thus when implementing FTL-travel in my story, I'm trying to wrap my head around everything to get stuff accurate. Now. I've read a whole bunch on the topic, and invariably, everyone says that FTL equals the possibility for time travel. I can parrot the explanations given to me, but that doesnt mean I understand WHY. In a way, I guess the title could be "Why isnt there any cosmological clock?" The way I've had it explained to me in the past is the following. If I'm writing a letter and send this letter using a faster-than-light mailman from Earth to Mars it would arrive at Mars before a person on Mars, using a superstronk telescope would be able to see me write this letter. Thus, it is explained, that if the person at Mars recieves the letter, writes a reply and sends it back to me using the same FTL-mailman, it would arrive at Earth before I started writing the first letter in the first place. The thing is.. I dont get why. Take the star Betelgeuse for example. We know its gonna go supernova within the next million years or so. For all we know, it already has, the light from said supernova just hasnt reached us yet. However, when we do recieve the light from Betelgeuse, we can say that the supernova happened 642 years ago (the distance between Betelgeuse and Sol is 642ly). The way I want to understand it, in an entirely hypothetical scenario, if the light from Betelgeuse had travelled at 3c, it would just have reached us 428 years faster, but we could still say that it happened 214 years ago. If we then had a ginormous mirror and reflected that light back, at the same speed it had, it would arrive at Betelgeuse 428 years after the supernova happened local time, or 214 years before light travelling at c would have reached us on Earth. But people have told me, using the mailmans example, this would somehow constitute time travel and the light would arrive at Betelgeuse before the supernova. Which makes no sense. Can you please explain to me what I'm not understanding? [link] [comments]  |
| Does putting alcohol into a fancy looking decanter necessarily make it taste better? Posted: 02 Nov 2017 02:18 PM PDT |
| How do different nuclear bombs fuse or fizz materials? Posted: 02 Nov 2017 09:38 PM PDT I know that hydrogen bombs fuse hydrogen into helium and that fission bombs start a chain reaction involving uranium, but how do these bombs trigger quickly enough to cause detonation? What is used to compress the hydrogen in hydrogen bombs, and what gets the uranium fission going so much faster than in a reactor? If anyone knows the principle behind a neutrino bomb, I am also interested in this. [link] [comments]  |
| In what cases would you want a leading vs. a lagging power factor and vice versa? Posted: 02 Nov 2017 09:37 PM PDT Started learning some power electronics and i'm trying to get a better grip on leading vs lagging currents/voltages and if it is ever desirable. In general I assume you can play around with capacitors and inductors to adjust the real power from a system but would there be a reason why you would want to purposely lag a voltage or current? [link] [comments]  |
| Considering the relative nature of velocity, are momentum and inertia the same thing? Posted: 02 Nov 2017 07:18 PM PDT As far as I understand, the difference between momentum and inertia is that momentum involves velocity, inertia doesn't. If the measure of an objects velocity can be altered depending on the frame of reference, it would make sense that it's influence on momentum could be neglected. To put it another way: we can change an objects measure of velocity to whatever value we want by changing the frame of reference we measure against. So, can't we just neglect whatever influence velocity has on momentum by simply changing the frame of reference to one that facilitates such a response? [link] [comments]  |
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