If the Earth stopped spinning immediatly, is there enough momentum be thrown into space at escape velocity? |
- If the Earth stopped spinning immediatly, is there enough momentum be thrown into space at escape velocity?
- How powerful are satellite signals?
- Why does the F-104 have such small wings?
- Is it possible to know if a molecule is harmful or not by only looking at its structure?
- When you are knocked unconscious are you in the same state as when you fall asleep?
- What sort of distance do we find between binary stars?
- Why don't we sneeze in our sleep?
- Do images taken by Hubble Telescope have the same colors that we see?
- Can we increase the speed of light (greater than its speed in the vacuum) by moving the medium through which it is traversing?
- If you start with 0.5, then add 0.25, then 0.125 and keep adding half of the number you just added, will you ever get to 1?
- Has Earth ever had irregular seasons?
- How does Plan B work on the molecular level? Can it prevent the implantation of an already fertilized blastula?
- Is all Earth's calcium-carbonate reserves produced by living organisms or is there "inorganic chalk"?
- How did STI’s originate?
- Two stars are on a collision path and predicted to explode into a red nova in 2022. Can we say that they've collided since they are 1,843 light years from Earth? How do we talk about events that have happened, but also haven't?
- Gut bacteria is a key part of human digestion. Where do newborn babies get their first gut bacteria from?
- What happens when two tones are played at the same time? Are there waves combined, or are they seperate?
- Are all Eukaryotes capable of developing cancer? (ignoring single celled organisms)
- Is it possible that the color of playing cards affects a players actions in poker?
- Why does plasma create light, when it is just a superheated gas?
- How do we have pictures of our galaxy?
- Why do some animals (like most big cats) kill their prey before feeding on them while others (like Wild Dogs,Baboons) do not mind eating their prey alive?
- Does the earth have weight?
| Posted: 06 Sep 2018 11:57 PM PDT |
| How powerful are satellite signals? Posted: 07 Sep 2018 04:57 AM PDT Satellite signals(ex: TV signals, GPS signals) are beamed from the space and can cover a HUGE area, like a whole country. Since signal intensity goes down as the covered area spread, how powerful are satellite signals to cover such a vast area? [link] [comments]  |
| Why does the F-104 have such small wings? Posted: 06 Sep 2018 11:20 AM PDT Is there any advantage to small wings like the F-104 has? What makes it such a used interceptor? [link] [comments]  |
| Is it possible to know if a molecule is harmful or not by only looking at its structure? Posted: 07 Sep 2018 12:52 AM PDT |
| When you are knocked unconscious are you in the same state as when you fall asleep? Posted: 07 Sep 2018 07:11 AM PDT If you are knocked out, choked out, or faint, do you effectively fall asleep or is that state of unconscious in some way different from sleep? I was pondering this as I could not fall asleep and wondered if you could induce regular sleep through oxygen deprivation or something. Not something I would seriously consider trying, but something I was curious about. [link] [comments]  |
| What sort of distance do we find between binary stars? Posted: 07 Sep 2018 01:18 AM PDT Are they like the sun and Jupiter with room for planets between them or are they spaced more like the sun and Neptune? I can't imagine binaries with planets simply because the orbits would become eccentric and then they would either end up in the star or launched into space. [link] [comments]  |
| Why don't we sneeze in our sleep? Posted: 06 Sep 2018 04:19 PM PDT |
| Do images taken by Hubble Telescope have the same colors that we see? Posted: 06 Sep 2018 08:12 PM PDT IIRC, I read somewhere that the images taken by Hubble Telescope are just black and white. The astronomers or technicians then analyze those images and digitally assign colors to each element according to what spectrum we know it emits. Is that true? And if we are in space now, can we see the universe as colorful as we see in images? Why or why not? [link] [comments]  |
| Posted: 06 Sep 2018 10:55 PM PDT I was recently trying to grasp the idea of special relativity, the notion of aether and Michelson-Morley experiment and I am wondering that if it would be possible to break the rule of constancy of light speed by a fast moving medium. I know that a moving medium affects the perceived speed of the wave by a stationary observer. Assuming light to be a wave (don't know if the duality comes into play here?) and passing it through a medium (say glass for example) and moving the medium say at a speed 'v' with respect to a stationary observer. Now as the medium is moving with respect to the observer with speed 'v' wouldn't he observe the speed of light to be as 'c+v' (assuming the direction of the velocity of moving medium is same as that of the propagating light wave)? I am assuming here that 'c' is the speed of light in glass (less than what it is in vacuum). But if 'v' is large enough we may cross the speed of light in vacuum? Its just that I can't seem to figure out why this won't work out, any insight as to where I may be going wrong would greatly help me! [link] [comments]  |
| Posted: 07 Sep 2018 04:09 AM PDT |
| Has Earth ever had irregular seasons? Posted: 06 Sep 2018 07:10 PM PDT |
| Posted: 07 Sep 2018 07:26 AM PDT I am aware that the primary mechanism by which Plan B works is through preventing fertilization in the first place, mainly by preventing ovulation. However, I have read that in the even that the egg *is* fertilized, Plan B can prevent it from implanting in the uterus. I am curious by what mechanism the drug actually works to prevent fertilization, or, if that does not work, prevent implantation. Also, I am aware that many fertilized eggs fail to implant naturally, so I assume that by "preventing it from implanting" sources mean that they increase the likelihood that implantation will fail to occur. How much more likely is it with taking Plan B than without? [link] [comments]  |
| Posted: 07 Sep 2018 06:04 AM PDT To my knowledge, all chalk depots of the world is residue from microorganisms that formed shells around them. The question is important in the search for extraterrestrial life, because Earth's chalk reserves binds massive amounts of CO2, which prevents the planet from looking like Venus, which is a runaway greenhouse disaster. If both calcium-carbonate, and - obviously - fossil carbon is a product of living organisms, then there appears to be no natural processes that diminishes CO2 levels on an otherwise Earth-like planet. Carbon control would have to be a result of life, never the other way around. [link] [comments]  |
| Posted: 06 Sep 2018 09:37 PM PDT I saw a post about it and I'm wondering how the first infection was transmitted? Obviously you can get a disease or infection without sex but if so, why are they dubbed sexually transmitted infections and why aren't people getting them without sex now outside of the occasional toilet seat etc? [link] [comments]  |
| Posted: 06 Sep 2018 05:20 PM PDT |
| Posted: 06 Sep 2018 03:24 PM PDT Do they have gut bacteria in the womb? Does it come through the breastmilk from mom? Does it come from bacterial contamination in their first solid food? Is is typical for fathers/siblings/other people commonly around a baby to transfer their gut bacteria to the baby? [link] [comments]  |
| Posted: 06 Sep 2018 05:32 PM PDT For example, if a speaker were to play an A and a C, would there physically be two waves at 440 and at 523.25, or would it just be one wave encoding a minor third from A? [link] [comments]  |
| Are all Eukaryotes capable of developing cancer? (ignoring single celled organisms) Posted: 06 Sep 2018 11:22 PM PDT |
| Is it possible that the color of playing cards affects a players actions in poker? Posted: 06 Sep 2018 09:05 PM PDT Like how red shirts make people look more sexual, or how room designers pick colors for certain activities. Interest was piqued because I've got a fire red/white deck, and a moonlight blue/black deck and they are so far contrasted that I couldn't help but consider the question. [link] [comments]  |
| Why does plasma create light, when it is just a superheated gas? Posted: 06 Sep 2018 05:56 PM PDT I understand that most extremely hot things create light, and that plasma is just gas that gets so hot that atoms start to fall apart, but why do very hot things and exothermic reactions create light? [link] [comments]  |
| How do we have pictures of our galaxy? Posted: 06 Sep 2018 01:54 PM PDT How do we have pictures of our galaxy? We might not even have a picture of it as far as I know. I ask this question because I see a picture now and again of the Milky Way with an arrow pointing to our star. I know we can see other galaxies outside of our own but when you see a picture of our own galaxy, how is that possible? [link] [comments]  |
| Posted: 07 Sep 2018 12:19 AM PDT |
| Posted: 06 Sep 2018 11:22 PM PDT Does the earth weigh anything? If weight is determined by the gravity of our planet, all directed to the exact center of the core then what would give the earth itself, floating in space, any weight? I know you can calculate mass but conceptually how can the planet have weight with no reference to any gravitational pull? [link] [comments]  |
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