Why can the Golden Ratio be found all over nature?

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• Why can the Golden Ratio be found all over nature?
• What causes the stinging sensation when you get soap in the eyes?
• Why do Uranus's rings and moons orbit 90 degrees to the sun too?
• Would a sand timer still work the same if the sand grains were boulder-sized and the timer was proportionally larger?
• This BB exits a bubble as soon as the bubble is completely popped. Is there a reason behind this, or just a coincidence?
• When light is slowed by something such as travelling through a medium like water, how does it speed back up when it exits? Wouldn't it require some external energy in order to speed back up?
• Do people who have lost limbs need to eat less?
• Why is a mylar blanket (first-aid blanket) effective against hypothermia/heat loss?
• Since the Earth moves in an ellipse around the sun. How significant is the centrifugal force?
• What are the physics behind an electron microscope that allow it to work?
• How do primatogolists/anthropologists/zoologists like Jane Goodall interact safely with aggressive chimps?
• Why don't the protons in the nucleus of an atom don't repel each other since they have a positive charge?
• How does a revolver cannon align the chamber with the barrel, and yet spin at a high rate? Won't there be potentially fatal issues with alignment?
• What did chemists use before magnetic stir bars?
• When I hear a jet engine, what's actually making the various sounds?
• Why is Xenon so much more reactive than the other noble gasses?
• If the expansion of the universe is supported by cosmic microwave background radiation, how can the universe be expanding exponentially?
• If octopi are entirely soft-bodied all the way through; where do their muscles anchor that they can still pull and push with their arms?
• If I release the gas pedal on a car while moving, only braking on the gears, would the car use any fuel?
• [Astronomy]Is it possible to have an orbit around the earth and the moon?
• Is it necessary for all theories of physics to have an axiomatic mathematical system to build upon?

Why can the Golden Ratio be found all over nature? Posted: 26 Mar 2016 07:26 AM PDT I've been looking into the golden ratio( fibonacci sequence) and I'm curious why it shows up in nature in many different places. Why does a geometric ratio play such importance that it withstood evolution? Edit: Thanks reddit for collectively taking my Front Page V-card. What are some applications of the golden ratio not related to biology and nature? Some people stated that the golden ratio in design it is a good starting point, i've used it for its convergence properties. Any others? submitted by /u/xalltime [link] [comments]

What causes the stinging sensation when you get soap in the eyes? Posted: 26 Mar 2016 09:04 PM PDT I'm curious about the mechanism - how do detergent molecules (or other components of soap) trigger a pain response? And in the case of baby shampoo and similar substances, how do they avoid triggering this response? submitted by /u/superhelical [link] [comments]

Why do Uranus's rings and moons orbit 90 degrees to the sun too? Posted: 26 Mar 2016 07:08 AM PDT submitted by /u/Davidhasahead [link] [comments]

Would a sand timer still work the same if the sand grains were boulder-sized and the timer was proportionally larger? Posted: 26 Mar 2016 05:51 PM PDT submitted by /u/rroach [link] [comments]

This BB exits a bubble as soon as the bubble is completely popped. Is there a reason behind this, or just a coincidence? Posted: 26 Mar 2016 11:35 PM PDT I saw this gif on another sub. Couldn't help but notice that the BB pellet exits the bubble as soon as it is fully popped. Is this just a coincidence, or something more? submitted by /u/Choppedporks01 [link] [comments]

When light is slowed by something such as travelling through a medium like water, how does it speed back up when it exits? Wouldn't it require some external energy in order to speed back up? Posted: 26 Mar 2016 02:13 PM PDT submitted by /u/kris860 [link] [comments]

Do people who have lost limbs need to eat less? Posted: 26 Mar 2016 11:35 AM PDT Assume a person is sedentary before and after their loss of limb. I would assume that they need to eat much less after, because there is less total body mass that they have to maintain. If this is true: How much less do they need, calorie-wise? If you lose both legs (let's call it ~20% of your total body mass) - do you need to take in ~20% less calories? Long-term - do their bodies "know" they need less food, or do they still feel the impulse to eat the same amount as before? Do nutritional needs change after a limb loss? (As a lower percentage of your body is muscle tissue, and a higher percentage is organs) If this isn't true: Why? submitted by /u/Dog_Knees [link] [comments]

Why is a mylar blanket (first-aid blanket) effective against hypothermia/heat loss? Posted: 26 Mar 2016 03:07 PM PDT How can something so thin and flimsy be so good at keeping heat where it is? submitted by /u/mutt1917 [link] [comments]

Since the Earth moves in an ellipse around the sun. How significant is the centrifugal force? Posted: 26 Mar 2016 10:48 PM PDT submitted by /u/whatsmyPW [link] [comments]

What are the physics behind an electron microscope that allow it to work? Posted: 26 Mar 2016 02:08 PM PDT I know that it uses a beam of electrons that somehow allow it to compile an image. And since the wavelength of electrons is much shorter than visible light the microscope will have a higher resolving power and be able to see more detail. But I'm wondering what the actual physics are at work, and how the microscope compiles them together. This is my first post so I'm sorry if it is unclear! Fell free to ask for clarification if I wasn't! submitted by /u/Jewberry_pie [link] [comments]

How do primatogolists/anthropologists/zoologists like Jane Goodall interact safely with aggressive chimps? Posted: 26 Mar 2016 03:20 AM PDT submitted by /u/GaoFooShwai [link] [comments]

Why don't the protons in the nucleus of an atom don't repel each other since they have a positive charge? Posted: 26 Mar 2016 01:10 PM PDT submitted by /u/TheMastr21 [link] [comments]

How does a revolver cannon align the chamber with the barrel, and yet spin at a high rate? Won't there be potentially fatal issues with alignment? Posted: 26 Mar 2016 04:08 AM PDT Hi! I'm very curious about firearms and mechanisms, even though I'm not an engineer, and I'd really appreciate any help with my understanding how these things work. In a Gatling gun, each barrel has its own chamber, so you don't have to worry about making sure the cartridge is aligned with the barrel before firing it- the entire assembly is being rotated. In a revolver handgun, the cylinder stops moving before each cartridge is fired, which means you could design a mechanism to lock and align each chamber with the barrel, avoiding alignment problems. However, in a revolver cannon, I see problems with either approach. If you stop the cylinder and lock it before firing each cartridge, you run into the problem of accelerating and stopping a pretty heavy cylinder repeatedly (in the order of thousands of rounds a minute), which I imagine puts immense strain on the locking mechanism, and wastes a lot of energy in applying such high opposite accelerations. On the other hand, if you keep the cylinder spinning continuously, won't misalignment be a very big risk or problem? A misfire would wreck the entire mechanism and possibly kill your crew. Also, would the momentum of the round cause asymmetrical strain on the barrel, since relative to the barrel, the round is moving to the side while it's being fired? Thanks for reading through all this! submitted by /u/whythecynic [link] [comments]

What did chemists use before magnetic stir bars? Posted: 26 Mar 2016 02:27 AM PDT I always wondered if there was some old device used to stir solutions that took a while to dissolve into complete solution. Or did the chemist just have to sit there stirring manually until the job was done? submitted by /u/AltrdFate [link] [comments]

When I hear a jet engine, what's actually making the various sounds? Posted: 26 Mar 2016 03:28 AM PDT submitted by /u/BedWedOrBehead [link] [comments]

Why is Xenon so much more reactive than the other noble gasses? Posted: 26 Mar 2016 03:22 AM PDT submitted by /u/fofbacon [link] [comments]

If the expansion of the universe is supported by cosmic microwave background radiation, how can the universe be expanding exponentially? Posted: 26 Mar 2016 04:57 AM PDT I've been told that background radiation supports the expansion of the universe, but if the universe is expanding exponentially, how can the linear volume-temperature relation hold true? Sorry for the poorly worded question, I'm still trying to work it out in my head. submitted by /u/DJ_Enchilada [link] [comments]

If octopi are entirely soft-bodied all the way through; where do their muscles anchor that they can still pull and push with their arms? Posted: 25 Mar 2016 09:32 PM PDT submitted by /u/Suck_A_Turd [link] [comments]

If I release the gas pedal on a car while moving, only braking on the gears, would the car use any fuel? Posted: 26 Mar 2016 01:39 AM PDT If I press down the clutch as well I understand it will, because the engine consume some fuel to keep it idle, but if it is braking on the gears wouldn't it be the wheels that kept the engine running? On newer cars with a real-time fuel consumtion display it would show 0.0 liters/100 km, but is this because the newer cars "know" it doesn't need fuel, or would it apply to older cars as well? Sorry if the question was badly phrased, english is not my main language. submitted by /u/Brainix112 [link] [comments]

[Astronomy]Is it possible to have an orbit around the earth and the moon? Posted: 26 Mar 2016 08:19 AM PDT submitted by /u/Sharukh77 [link] [comments]

Is it necessary for all theories of physics to have an axiomatic mathematical system to build upon? Posted: 26 Mar 2016 11:43 AM PDT I wonder wether some kind of Gödels incompletness theorems apply also to systems of physics. submitted by /u/paschep [link] [comments]

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If water has a boiling point of ~100 degrees C, why does it evaporate at room temperature?

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• If water has a boiling point of ~100 degrees C, why does it evaporate at room temperature?
• Would single stage rockets be achievable on Mars?
• Theoretically, how many bits of information make up our universe?
• Why are electrical monopoles possible but magnetic and gravitational ones aren't?
• Can the spot of a laser pointer move faster than light?
• if fusion in stars that go supernovae stops at iron, from where did we get heavier elements here on earth??
• If I randomly 'observe' a photon (I sometimes do, sometimes not) and then run a double slit experiment will I be able to determine if the photon has been observed or not by whether it forms an interference pattern?
• Does the effectiveness of evaporative cooling decrease as the surrounding temperature increases?
• Now that we can detect gravitational waves, will there be events we can observe through both gravity and regular astronomy?

If water has a boiling point of ~100 degrees C, why does it evaporate at room temperature? Posted: 25 Mar 2016 09:10 AM PDT submitted by /u/mrgreencannabis [link] [comments]

Would single stage rockets be achievable on Mars? Posted: 25 Mar 2016 08:36 PM PDT With its decreased gravity would single stage rockets that go from the Martian surface to Martian orbit or even interplanetary space be achievable with already existing technology? submitted by /u/READERmii [link] [comments]

Theoretically, how many bits of information make up our universe? Posted: 25 Mar 2016 07:28 PM PDT I was wondering about this in relation to a simulation. If there was a simulation on the scale of our universe, something as complex and as large, in terms of actual bits, how many would this simulation have/need? I dont know if this is the proper way to put this question, but hopefully someone understand. Is this is even possible to estimate? Thanks! submitted by /u/Read_or_bleed [link] [comments]

Why are electrical monopoles possible but magnetic and gravitational ones aren't? Posted: 25 Mar 2016 08:44 AM PDT Specifically, in simple terms, what is it about the mathematics of the Maxwell equations that says a positive or negative charge can exist but a magnetic one can't? Is there similar maths that says why gravitational monopoles don't exist? submitted by /u/thecuriousscientist [link] [comments]

Can the spot of a laser pointer move faster than light? Posted: 26 Mar 2016 06:58 AM PDT Assuming I am standing far enough from a very long wall and have a strong laser pointer, I can make the dot of the laser pointer move fairly quickly. Is there anything stopping me from moving the dot faster than the speed of light? submitted by /u/PrimeMower [link] [comments]

if fusion in stars that go supernovae stops at iron, from where did we get heavier elements here on earth?? Posted: 25 Mar 2016 01:03 PM PDT I mean really heavier elements like uranium.. submitted by /u/Moon_ire [link] [comments]

If I randomly 'observe' a photon (I sometimes do, sometimes not) and then run a double slit experiment will I be able to determine if the photon has been observed or not by whether it forms an interference pattern? Posted: 25 Mar 2016 08:46 AM PDT I am quite new to quantum mechanics and this bit just baffles me and I feel that I am misunderstanding this concept in the double slit experiment. Any help would be appreciated! :) submitted by /u/pokuit [link] [comments]

Does the effectiveness of evaporative cooling decrease as the surrounding temperature increases? Posted: 25 Mar 2016 07:07 PM PDT I understand that when we sweat, the sweat evaporating off of our skin cools us down. However, if the surrounding temperature increases, wouldn't the water take less energy from your skin, and more from the hot air around you? Wouldn't that make it take less energy and cool you down less? submitted by /u/Amvizzy [link] [comments]

Now that we can detect gravitational waves, will there be events we can observe through both gravity and regular astronomy? Posted: 25 Mar 2016 11:55 AM PDT submitted by /u/someone_entirely_new [link] [comments]

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Have "Oort Clouds" been observed or measured around other stars?

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• Have "Oort Clouds" been observed or measured around other stars?
• Can generalized anxiety spread throughout a group of individuals?
• Do Tachyons Exist?
• If subatomic particles make up everything, yet take up no space. How can everything around me take up space?
• Why do you need vitamin D to metabolise calcium and other minerals?
• Does the legality of virtual child pornography affect the number of incidences of sex offending against children?
• Can ants recognize each other on an individual basis using pheromones?
• How can TV networks and radio stations tell how many viewers/listeners they have at a given moment?
• Can rainfall amplify sky noise? (Jet noise more specifically)
• What symmetries exist in a hydrogen atom?
• Why can a complex number be used in Physics?
• Why is dicarbon monoxide not triangular?
• Is a 'flying saucer' (as far as we know) an aeronautically valid way to fly?
• How far removed from a nucleus can an electron be before we can say it is no longer associated with that nucleus?
• Supposing that wealth is redistributed, would inflation still occur even though no wealth is added and why?
• Why does venous constriction cause an increase in venous return when it is increasing resistance which should decrease flow?
• Is quantum entanglement "communication" with the particles in separate Faraday cages possible?
• How can caffeine be calorie free but still give me energy?
• Given enough time how deep could a river erode?
• Could we ever truly know if Pi was a rational number?
• Will plasma overtake the LHC? If so, what's the advantage of spending $13.25B to find the higgs boson early?
• What is the mathematical proof of the lift equation used to determine the lift produced by an aerofoil?

Have "Oort Clouds" been observed or measured around other stars? Posted: 24 Mar 2016 07:15 PM PDT submitted by /u/random-tucsonan [link] [comments]

Can generalized anxiety spread throughout a group of individuals? Posted: 24 Mar 2016 09:17 PM PDT What brought up the question/ the parameters. My friends and I were all together tonight (4 of us). We were doing what we usually do, sitting around playing poker and listening to music, when everyone myself included got the urge to leave, so we go on a walk. I can tell one of my friends is getting distressed, so I suggest we get something to eat. While there I got the very eerie and intense feeling that someone was watching me. My one friend just seems outright depressed at this point. At the end if the night one if the other friends tells me that something just did not feel right at all that night, unrelated to my or the other friend's situation, as we didn't mention it to him. So, I was wondering if it was merely a coincidence, it if there is some psychological reason this may have happened. I would be intrigued to know. Thanks in advance submitted by /u/NuclearFunTime [link] [comments]

Do Tachyons Exist? Posted: 24 Mar 2016 06:50 PM PDT submitted by /u/padseeyou [link] [comments]

If subatomic particles make up everything, yet take up no space. How can everything around me take up space? Posted: 24 Mar 2016 08:38 AM PDT submitted by /u/Shuckle1 [link] [comments]

Why do you need vitamin D to metabolise calcium and other minerals? Posted: 24 Mar 2016 08:45 PM PDT I've heard one of the best ways to die slowly is to deprive yourself of sunlight for a long time. You end up with low testosterone, thinning hair, weight (fat) gain, increased risk of osteoporosis, heart problems, poor sleep from abnormal circadian rhythm, increased risk of diabetes, no libido, depression…it's horrible. Why is this? edit: May have been better to under Biology submitted by /u/Xemnas81 [link] [comments]

Does the legality of virtual child pornography affect the number of incidences of sex offending against children? Posted: 24 Mar 2016 07:14 PM PDT I know virtual child pornography is a very touchy subject. In certain areas in the world, like the UK and Canada, it is completely illegal. Australia apparently goes further by banning pornography of women with small breasts. In other areas like the US (Ashcroft vs Free Speech Coalition) and Japan, it is legal, or at the very least in a legal grey area. Is there any causation between the legality of it and the number of incidences of offenses? I've heard people theorize that having it legal will increase the number of offences, or decrease the number of offenses, but what are the actual statistics? submitted by /u/SitOnMyFaceTatsumaki [link] [comments]

Can ants recognize each other on an individual basis using pheromones? Posted: 24 Mar 2016 08:11 PM PDT submitted by /u/aroused_lobster [link] [comments]

How can TV networks and radio stations tell how many viewers/listeners they have at a given moment? Posted: 24 Mar 2016 07:24 PM PDT submitted by /u/Holden_Caulfiend [link] [comments]

Can rainfall amplify sky noise? (Jet noise more specifically) Posted: 24 Mar 2016 07:58 PM PDT Raining in Ohio now. Hearing jets noticeably louder than on clear nights. Not near low or varied flight paths. Wondering if pressure or downward movement of rain is somehow at play. submitted by /u/S_words4_500 [link] [comments]

What symmetries exist in a hydrogen atom? Posted: 24 Mar 2016 11:17 PM PDT Another thread earlier today brought up the planetary model of a hydrogen atom, which would have an axis about which an electron is orbiting at some radius. Does the solution to the Dirac equation for a universe with a hydrogen atom have a similarly privileged axis? A set of such axes? [link] [comments]

Why can a complex number be used in Physics? Posted: 24 Mar 2016 08:11 AM PDT I'm currently trying to understand how to use complex numbers and with that how to calculate with i. I think I now understand the basic math behind it, but I'm still confused how a number, that in some kind of way doesn't exist, is able to describe something like Oscillation in Physics. Or to better describe my question: Why do we need something imaginary to describe a progress that happens in the "real" world? Edit: Thanks everyone for helping and answering. Special thanks to /u/functor7 :) submitted by /u/Waffenbeer [link] [comments]

Why is dicarbon monoxide not triangular? Posted: 24 Mar 2016 04:14 PM PDT Looking at the diagram of dicarbon monoxide, it would seem that two triple-bonded carbons each with a single bond to the oxygen molecule in a triangle would be a more equilibrated structure. Why then does it form a straight molecule? submitted by /u/iorgfeflkd [link] [comments]

Is a 'flying saucer' (as far as we know) an aeronautically valid way to fly? Posted: 24 Mar 2016 09:10 PM PDT A flying saucer like this? submitted by /u/Type_ya_name_here [link] [comments]

How far removed from a nucleus can an electron be before we can say it is no longer associated with that nucleus? Posted: 24 Mar 2016 04:34 PM PDT Earlier there was a post about electrons occurring probabilistically around a nucleus. One poster shared an image of an electron's position around this nucleus. My question is, could an electron be meters or kilometers away from a nucleus and still be considered part of that atom? What defines how far it might go? submitted by /u/Frogmarsh [link] [comments]

Supposing that wealth is redistributed, would inflation still occur even though no wealth is added and why? Posted: 24 Mar 2016 08:08 PM PDT submitted by /u/answerthedamquestion [link] [comments]

Why does venous constriction cause an increase in venous return when it is increasing resistance which should decrease flow? Posted: 24 Mar 2016 04:30 PM PDT So flow=delta pressure/resistance. vasoconstriction increases resistance so flow should decrease. But i keep reading that vasoconstriction increases end diastolic volume. Is there a difference between vasoconstriction and decreasing venous compliance? Is this the point that I am missing? Thanks, any help is appreciated. submitted by /u/gorightthroughformsu [link] [comments]

Is quantum entanglement "communication" with the particles in separate Faraday cages possible? Posted: 24 Mar 2016 01:45 PM PDT Disclaimer: I know very little about either Faraday cages or entanglement. Here's the scenario, you have to entangled particles in separate rooms, but the rooms themselves are Faraday cages. When you change the spin on one particle, will the other know or will it be blocked by the Faraday cage? submitted by /u/Riverhawk99 [link] [comments]

How can caffeine be calorie free but still give me energy? Posted: 24 Mar 2016 11:12 AM PDT A calorie is a unit of energy, and caffeine gives me energy, so how can it be calorie free? submitted by /u/LetsMeetInMyVan [link] [comments]

Given enough time how deep could a river erode? Posted: 24 Mar 2016 11:29 AM PDT *additionally given an infinite amount of time could all land mass on the planet be eroded? submitted by /u/Andrewmoo [link] [comments]

Could we ever truly know if Pi was a rational number? Posted: 24 Mar 2016 06:49 PM PDT Even if we measure Pi to repeat all of its digits say 10 times, would we then be able to say that it was a rational number? Because since, to the best of our knowledge, Pi has an infinite number of digits arranged in an infinite number of ways, at some point in the infinitely long chain of digits, Pi will repeat itself 10 times. So even if we found that Pi did repeat itself eventually, how could we know that after those repetitions it didn't then carry on being non-repeating? submitted by /u/Hoccapocca [link] [comments]

Will plasma overtake the LHC? If so, what's the advantage of spending $13.25B to find the higgs boson early? Posted: 24 Mar 2016 01:37 PM PDT Why didn't we just wait until particle accelerators are 1/10 the cost? What do we actually gain in the long run? submitted by /u/StratonFerit [link] [comments]

What is the mathematical proof of the lift equation used to determine the lift produced by an aerofoil? Posted: 24 Mar 2016 11:58 AM PDT The lift equation is L=Cl A 1/2 ρ v2 I understand why lift is produced by an aerofoil, I was wondering the proof behind it. I originally thought that Bernoulli's equation 1/2 ρ v2 = K-P However the closest I have got to is A 1/2 ρ v2 =K-P Is there a way to derive the lift equation without calculus? Or if there isn't, how would you prove the equation? submitted by /u/please-dont-hurt-me [link] [comments]

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