Is the sun soft or hard? |
- Is the sun soft or hard?
- Why are men who have had sex with other men not able to donate blood?
- How did the scientists, in the dawn of chemistry as we know it, knew when they found a new element? How were they sure it wasn't just another compound?
- Are earthquakes "connected"?
- Does the discovery of gravitational waves falsify quantum mechanics?
- What is the unit of measurement for gravitational waves?
- Are the electrons within an atom entangled?
- Can you use quantum entanglement to get around Heisenberg's uncertainty principle?
- Could enough rotational energy be imparted to a black hole to rip the singularity apart?
- How strong a gravity could humans adapt to?
- What exactly makes a bolide explode in the atmosphere?
- What are some "presentable" nuclear or quantum physics subjects?
- Is there any place in the universe, or could we make a place, where EM field doesn't exist ? Are we able to PURGE an EM-Field ?
- Is there any difference between mass granted by the Higg's mechanism versus mass granted by the Strong force?
- Is a square or a triangle shaped "tower" able to hold a heavier load?
- What factors determine the "voice" of a crowd in a stadium chanting a player's name?
- When a helium balloon contracts from the cold, does it loose lift power?
- Will an object greater mass hit the ground faster than lighter object if they're dropped in still air conditions (no wind etc) and are of the same shape and size?
- What's the mechanism of pH indicators? Why do they change color?
- During El Niño years do the trade winds over southern Atlantic also weakens?
- What are the physical/neural mechanisms for keeping track of time?
| Posted: 16 Apr 2016 06:45 AM PDT To give an example; if I was flying a spaceship (let's assume it can withstand the extreme conditions), and I wanted to enter the sun, would the ship just sail through or would it crash on the surface? [link] [comments]  |
| Why are men who have had sex with other men not able to donate blood? Posted: 17 Apr 2016 12:05 AM PDT I believe it is against regulation at least in the US. [link] [comments]  |
| Posted: 16 Apr 2016 07:55 PM PDT Taking boron as an example: it was discovered in 1808. How did Gay-Lussac and the other scientists who discovered it knew it was a completely new element? [link] [comments]  |
| Posted: 16 Apr 2016 09:13 PM PDT I've been noticing in the past couple of years that when a medium to large-scale earthquake happens in one part of the earth, another one follows within a week or two in another part of the earth. This makes me think that there is a connection between them... the most recent example being the 7-magnitude quake in Kyushuu, Japan and the 7.8 in Ecuador. If this is true, can someone explain? [link] [comments]  |
| Does the discovery of gravitational waves falsify quantum mechanics? Posted: 16 Apr 2016 09:18 PM PDT |
| What is the unit of measurement for gravitational waves? Posted: 16 Apr 2016 02:44 PM PDT Now that we have found einsteins gravitational waves; I am writing a bit of science fiction which is centered around space-fold/warp technology. I am curious, now that Einsteins gravitational waves have been proven; what is the unit of measurement by which they are measured? Also are these gravitational waves measurable in the electro-magnetic wave-length? I ask, because by this measure, wouldn't "warp" drives use wave-length to measure jumps? [link] [comments]  |
| Are the electrons within an atom entangled? Posted: 16 Apr 2016 01:32 PM PDT Because of Pauli's exclusion principle, two electrons within the same orbital cannot have the same spin, so, this means that by measuring the spin of one electron you automatically know the spin of the second electron. Are the electrons really entangled? Does the same math that is used to describe entanglement describe what's happening here? [link] [comments]  |
| Can you use quantum entanglement to get around Heisenberg's uncertainty principle? Posted: 16 Apr 2016 12:13 PM PDT Could you not measure the momentum of one entangled particle a and the position of the entangled particle b, then use the momentum of the entangled particle b as the momentum of entangled particle b? [link] [comments]  |
| Could enough rotational energy be imparted to a black hole to rip the singularity apart? Posted: 16 Apr 2016 08:11 AM PDT I was just thinking about centrifugal force and I was wondering if enough rotational energy could theoretically be added to a black hole to cause the singularity to be pulled apart and release the mass contained in the black hole. Is it theoretically possible? If not, what would prevent that from happening? [link] [comments]  |
| How strong a gravity could humans adapt to? Posted: 16 Apr 2016 10:18 AM PDT For a sustainable society everything else being equal what is the strongest gravity a human world can have? And what would a visit to Earth be like for the inhabitants of this hypothetical world? [link] [comments]  |
| What exactly makes a bolide explode in the atmosphere? Posted: 16 Apr 2016 12:02 PM PDT Been looking around Wikipedia for an answer to this, but it doesn't explicitly say it so I'm still not sure. Does the bolide contain something in its body that's explosive? Is it just that if it's hot enough, it cracks like wood in a fire? Or is it something pressure-related? EDIT: I scoured Wikipedia but forgot to do a basic Google search, which I did after I got the bot's message. So Today I Learned it's the air pressure that makes it shatter. Secondary question still applies though. As a secondary question, Wikipedia's list of meteor air bursts page has a chart that says the (average, I'm assuming) kinetic energy yield during an air burst, for an asteroid 20m in diameter, is 230 kt of TNT equivalent--but the Chelyabinsk meteor, with the same diameter, released double that at 500 kt. What makes the explosion vary like this? EDIT (same one as before): Also, on the meteorite thread from the FAQ, there was a question that got asked but I don't think got answered. Was it the air burst specifically that caused windows to shatter, or was it "just" the fact that it was making continuous sonic booms, strengthened by the fact that the meteor fell at an angle? [link] [comments]  |
| What are some "presentable" nuclear or quantum physics subjects? Posted: 17 Apr 2016 03:32 AM PDT Hello, We have to present a topic to the class in my Modern Physics class. It should be about nuclear physics or quantum physics, yet I am unable to find something interesting that we didn't already learn. "You will be giving a 16 minute seminar, with a maximum of 2 minutes for additional questions, during class time in May- June. Your presentation will be based on a topic from nuclear physics, or from medical physics, or from quantum physics and will be approved by your teacher beforehand." What are some interesting yet rather unknown topics that come to your mind? Thanks. [link] [comments]  |
| Posted: 16 Apr 2016 11:47 AM PDT |
| Posted: 16 Apr 2016 09:44 AM PDT Forgive my terminology, but as I understand it, the Higg's field creates mass for elementary particles, but the vast majority of mass we see is a result of the strong force holding together bundles of quarks and nucleons. How is it that these 2 seemingly different mechanisms result in something that on our scale look like exactly the same thing? Does mass created by the strong force interact with the Higg's field? Does mass created by the Higg's field interact with the curvature of spacetime? [link] [comments]  |
| Is a square or a triangle shaped "tower" able to hold a heavier load? Posted: 16 Apr 2016 12:42 PM PDT I have noticed that different cell towers (or similar type tower) are sometimes Triangular (3 support pillars) and some are square (4 support pillars). I got into a discussion with a friend as to what the difference was between the two were and if one design can hold more weight than the other. We each have theories on why one is better than the other, but can't find a definitive answer. So I guess my question is, which can hold a heavier load, a square base or a triangle shaped base? Edit: To be a little more specific,assume they both have the same build cost and amount of material put into it. [link] [comments]  |
| What factors determine the "voice" of a crowd in a stadium chanting a player's name? Posted: 16 Apr 2016 06:59 PM PDT I'm watching the Capitals VS Flyers game and the Caps goalie has done a great job tonight. In the final seconds, the crowd was cheering "HOLTBY! HOLTBY! HOLTBY!" and it occurred to me that it appeared to be a pretty deep voice. So does the shape of the stadium/dome affect the tone and pitch of the voice, or is it just an average of all the voices? [link] [comments]  |
| When a helium balloon contracts from the cold, does it loose lift power? Posted: 16 Apr 2016 06:58 PM PDT We have been sending off gas filled balloons attached to helium balloons, and we noticed that the helium balloons contracted and seemed to deflate in the cold. Since this space isn't being replaced with any other gas, does the balloon loose any power? [link] [comments]  |
| Posted: 16 Apr 2016 04:28 PM PDT E.g. Two exactly similar balls with absolutely same size and shape, volume and all other physical properties, except mass are dropped from, say, plane, but with no wind to affect them. Will the heavier ball reach the Earth a bit faster? [link] [comments]  |
| What's the mechanism of pH indicators? Why do they change color? Posted: 16 Apr 2016 05:31 PM PDT I understand that the molecule changes because a hydrogen ion is removed or added, changing resonance structures, but I don't see how resonance changes how light interacts with the molecule. From what I've seen, I've also noticed that more indicators are more red on the acid side, and more blue on the base side. I was wondering, is that just a coincidence or does it mean something? [link] [comments]  |
| During El Niño years do the trade winds over southern Atlantic also weakens? Posted: 16 Apr 2016 07:53 PM PDT I know that during El niño years the southern Pacific trade winds weakens. What about the southern Atlantic trade winds? Do they also weaken? [link] [comments]  |
| What are the physical/neural mechanisms for keeping track of time? Posted: 16 Apr 2016 07:03 PM PDT |
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