What causes this ring of fire from a Desert Eagle? *Link in description* (x-post r/woahdude) |
- What causes this ring of fire from a Desert Eagle? *Link in description* (x-post r/woahdude)
- How can you melt metal with magnets?
- Could you swing on a swing set on the moon?
- Why does a shock wave distort light?
- What would Earth be like if it rotated on the ecliptic?
- Isn't it not technically correct to say there are four fundamental forces anymore?
- What causes the repulsive force between atoms?
- Food pairings, how do they work? Why do some foostuffs have comlementary flavors which call out for one another, while others don't? Is it purely cultural or is there a physiological underpinning to this?
- Is it possible to imagine a modified space to get pi = 3?
- Why are plants mostly green and solar panels mostly black?
- Why do we grunt while performing strenuous tasks?
- With pegasus approaching the milkyway; How does that effect Gravity Time Dilation on earth now? Is time Speeding up even minutely?
- I have difficulty wrapping my head around the idea of a 3 dimensional solar system. What is above or below Earth?
- Is there anything that prohibits a planet from orbiting the sun in the opposite direction of the suns rotation?
- Why can't an electron's velocity and position be found at the same time (Heisenberg's Uncertainty Principle)?
- What exactly are mental images? How exactly can you see or hear whatever you want in your head at will without taking hallucinogenics?
- Why does the logarithmic integral li(x) approximately model the prime counting function pi(x)?
- Is time on GPS satellites corrected because of the lesser gravity or because the speed they're moving?
- [Mathematics] Can you have a non-natural number for a number base?
- How does the wavelength of light change after passing through different colored water?
| What causes this ring of fire from a Desert Eagle? *Link in description* (x-post r/woahdude) Posted: 14 Nov 2015 05:47 AM PST |
| How can you melt metal with magnets? Posted: 13 Nov 2015 11:53 AM PST I stumbled across this video https://www.youtube.com/watch?v=8i2OVqWo9s0 How does this work? I have absolutely no idea. [link] [145 comments]  |
| Could you swing on a swing set on the moon? Posted: 13 Nov 2015 01:51 PM PST With or without someone pushing you? inspiration: was listening to Frank Sinatra Fly me to the moon [link] [162 comments]  |
| Why does a shock wave distort light? Posted: 14 Nov 2015 12:28 AM PST You can see a shock wave clearly in an example like this but why? It is very similar to the way light is distored as it enters a new medium. However, it's still the same medium, does it have something to do with the density of that medium around the wave as it propagates through the air? [link] [4 comments]  |
| What would Earth be like if it rotated on the ecliptic? Posted: 13 Nov 2015 07:06 PM PST |
| Isn't it not technically correct to say there are four fundamental forces anymore? Posted: 14 Nov 2015 12:02 AM PST It seems like there's 6 to me. As far as I know, each boson (group) mediates one force:
However, it seems that there are two other groups, the Higgs Boson (the mass interaction? Not sure what to call it), and the X and Y bosons (proton decay, iirc). So are these forces just like the others? If not, why, and if so, why do we still seem to stick to those four as the fundamental forces? [link] [6 comments]  |
| What causes the repulsive force between atoms? Posted: 13 Nov 2015 01:25 PM PST As a chemistry undergraduate, I have recently learned about the forces between atoms in solids. I understand that there is an attractive (Coulombic) and a repulsive force. The combination of the two leads to a distance between atoms at which the energy is minimized. The cause of the repulsive force was said to be the overlap of atomic orbitals, which is forbidden by the exclusion principle. However, I thought that the overlap of two atomic orbitals leads to the formation of two molecular orbitals (one bonding and one anti-bonding). I also thought that the orbitals/wavefunctions of the electrons don't have a finite size, but spread out with decreasing amplitude/probability of finding the electron. This does not agree with what I was taught about the replusive force. So, what is the nature of the repulsive force? [link] [20 comments]  |
| Posted: 13 Nov 2015 09:19 AM PST Examples of pairings: Maple pie with milk, smoked meat or hot dogs with mustard, strawberries and cream counter examples: mustard and strawberries, pickles and cream It's the same food and there is nothing wrong with it, yet in one combination it is exquisite and in another disguting to most. [link] [16 comments]  |
| Is it possible to imagine a modified space to get pi = 3? Posted: 13 Nov 2015 10:29 PM PST Gravity changes the shape of the space, we know that there are some geometries where the sum of the angles in the triangle is different from 180 degrees. Could be possible to imagine a warping of space where the ratio between circumference and diameter of a circle is exactly 3 and not 3.14...? In that case we could postulate that PI is equal to 3, and the fact that in our universe PI is not 3 could be lead to the conclusion that our reality is not the ultimate reality... it's a signature. Like the "totem" in Inception... a rational being could know that this Universe is not the ultimate universe because PI is not rational. The dimensions are warped in a way to make it irrational. Like Pythagoras we could postulate that a "perfect" universe is one where irrationals do not exist... and this is a imperfect simulation of that one. [link] [5 comments]  |
| Why are plants mostly green and solar panels mostly black? Posted: 14 Nov 2015 06:13 AM PST |
| Why do we grunt while performing strenuous tasks? Posted: 13 Nov 2015 07:40 PM PST I've had this question floating around in my head today and a Web search doesn't reveal much. [link] [2 comments]  |
| Posted: 13 Nov 2015 08:37 PM PST It seems minuscule but, what is the magnitude? https://en.wikipedia.org/wiki/Gravitational_time_dilation http://www.space.com/2125-shock-galaxies-caught-colliding.html I have another question. Since gravity is not absolute on earth but, changes based on z position relative to the center of the earth; is there a minuscule time dilation for every point on Earth? (Assuming no two points on earth have the same z position) [link] [1 comment]  |
| Posted: 13 Nov 2015 07:29 PM PST I always picture space as a 2 dimensional object where everything is lined up left to right and we can only travel "east to west". What is above or below earth? Could we fly vertically from Earth and escape the solar system? It blows my mind. [link] [5 comments]  |
| Posted: 13 Nov 2015 06:40 PM PST |
| Posted: 13 Nov 2015 06:11 PM PST I get the concept of an electron cloud and probability of position based on that, and get that an electron behaves as a wave and particle, but can't seem to grasp the principle. Thanks [link] [11 comments]  |
| Posted: 13 Nov 2015 08:01 AM PST |
| Why does the logarithmic integral li(x) approximately model the prime counting function pi(x)? Posted: 13 Nov 2015 01:45 PM PST The integral of 1/ln(x), the reciprocal of the power a constant e has to be raised to to get x, seems totally unrelated to the frequency of prime numbers, and yet the difference between the prime counting function and the logarithmic integral remains less than 10000 even when x is larger than 1010. What is the connection between the two "functions" (function being used loosely here), or between the function and the concept of prime numbers? [link] [2 comments]  |
| Posted: 13 Nov 2015 02:19 PM PST Also, is their time slower relative to earth (because how fast they move) or faster (because less gravity)? Sorry if I'm asking this whole thing wrong :/ [link] [2 comments]  |
| [Mathematics] Can you have a non-natural number for a number base? Posted: 13 Nov 2015 12:41 PM PST Like, is it possible to have numbers in, I dunno, base 5.7? Base pi? Base e? I'm pretty sure a negative base would still break things... [link] [2 comments]  |
| How does the wavelength of light change after passing through different colored water? Posted: 13 Nov 2015 11:24 PM PST If I added different food coloring to different samples of water (red, blue, green, yellow) and shone the same light source through each of them, the absorption spectrum and wavelength of the light in the water would be different for each sample, is this correct? I know this is a physics question, but in context it is for a biology investigation. I am attempting to model the effect of different wavelengths of light on photosynthesis. The plant (Elodea) would be submerged in these waters of different color/wavelengths. [link] [3 comments]  |
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