What's the difference in infrastructure needed to provide 3G/4G/5G signals?

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• What's the difference in infrastructure needed to provide 3G/4G/5G signals?
• When you spin yourself in an office chair and pull your legs in you spin faster. What is this called? Besides fun.
• How can we tell how far a star is?
• Solutions to the equation a^a = b^b?
• [OPTIC] Why does every measurement of a system that contains coupling/transmission is approximated through a lorentzian function?
• Is there a certain amount of "real estate" at the a given Lagrangian point? Could we potentially put too many stations, observatories, or other spacecraft there and run out of room?
• Is it possible to use quantum entanglement to exchange encryption keys?
• Why do all the planets orbit in the same direction?
• Ribosome inputs and outputs?
• (Chemistry) Why soil is considered as organic as well as inorganic natural resource ??
• [Physics] Are we absolutely sure that what we know about classical mechanics applies on Mars?
• What is Invariant Space-time Interval and what ramifications does it have on our understanding of space-time?
• What caused the first cell to split?
• Is there a difference between how the human body processes added sugars vs naturally occuring sugars?
• I have a coin that I suspect flips heads 50.1% of the time, how many flips do I need to distinguish it from a coin that flips heads 50% of the time?
• What is "Nuclear Pasta" ?
• Why doesn't gravity work on small scales?
• Where do microscopic and macroscopic overlap?
• What makes Carbon 14 (and other atoms) unstable?
• What exactly is a psu efficiency rating and what does it measure?
• What is the force acting between gas molecules that keeps them away from each other? (or) Why is air pressure so very homogenous? Why aren't gasses more... sloshy?
• Why does a liquid being poured out of a bottle not flow smoothly?
• Can an object collapse in on itself if it's thin enough?

What's the difference in infrastructure needed to provide 3G/4G/5G signals? Posted: 01 Nov 2016 08:48 PM PDT I was wondering what's the difference between the antennas or cell towers needed to provide 3G/4G/5G. Does it need a totally new antenna? Maybe more cell towers? Does it need just a minor change on each? Or does it need nothing at all in terms of infrastructure? Thank you! submitted by /u/juanb95 [link] [comments]

When you spin yourself in an office chair and pull your legs in you spin faster. What is this called? Besides fun. Posted: 01 Nov 2016 08:33 PM PDT submitted by /u/Tragicanomaly [link] [comments]

How can we tell how far a star is? Posted: 02 Nov 2016 12:17 AM PDT Hi,I know about redshift, though I can't understand how we can tell how much that light has redshifted if we don't know its original state. In other words, we can observe only the light that travelled that long way to us, and due to doppler effect it has shifted a bit. I read the defition of redshift, and it says it happenens when the frequence of light is lower than when it was emitted. But we don't actually know what its original frequence was, right? I know this may sound a stupid question to you, but I can't realize it by myself. submitted by /u/teoreds [link] [comments]

Solutions to the equation a^a = b^b? Posted: 01 Nov 2016 08:58 PM PDT After seeing the thread about the possible solutions to ab = ba, I was wondering what will happen if we were to look for the solutions to aa = bb where a =/= b. One possible solution is when a = 1/2 and b = 1/4. Intuitively, the possible solutions for a and b should be in the interval (0,1) since if a > b > 1, then aa > bb. By considering the function y = xx, it can be shown that it achieves a global minimum at 1/e and that the graph concaves up for every x in its domain. So, in the interval (0, 1), there ought to be infinite solutions as horizontal straight lines can be drawn to cut the graph of y twice in this interval. (Please do correct me if this reasoning is wrong.) So, the thing is, is it possible to obtain all possible pairs of (a, b) that are solutions to aa = bb ? submitted by /u/XiaoFatty [link] [comments]

[OPTIC] Why does every measurement of a system that contains coupling/transmission is approximated through a lorentzian function? Posted: 02 Nov 2016 04:22 AM PDT I often read that something in the field of optic gets measured and then gets least-square fitted by a lorentzian functionl. I think it was always with coupling/transmission etc. hence the question, since I didn't find any source and everything that I found just stated that they did it. submitted by /u/SEND_ME_ICECREAM [link] [comments]

Is there a certain amount of "real estate" at the a given Lagrangian point? Could we potentially put too many stations, observatories, or other spacecraft there and run out of room? Posted: 01 Nov 2016 10:22 AM PDT submitted by /u/Nemothewhale87 [link] [comments]

Is it possible to use quantum entanglement to exchange encryption keys? Posted: 01 Nov 2016 08:10 PM PDT I know that you can't choose the state of entangled particles so you can't send a message with them other than random noise, but that got me thinking--random noise is a good encryption key, right? So if we got say 256 pairs of entangled particles, both parties could know the key they're using for a symmetric encryption scheme without anyone else possibly finding out: it would probably be the most secure key exchange method physically possible. Are there any holes in my logic or would this work? (Of course I know you still couldn't send faster than light messages this way) submitted by /u/smikims [link] [comments]

Why do all the planets orbit in the same direction? Posted: 02 Nov 2016 06:12 AM PDT submitted by /u/JDIVII [link] [comments]

Ribosome inputs and outputs? Posted: 01 Nov 2016 08:35 AM PDT In protein synthesis triplets of RNA are being consumed/evaluated at the ribosome to direct amino acids selection I want to know if the process is destructive to the RNA strand or not or both are possible submitted by /u/diogenes_shadow [link] [comments]

(Chemistry) Why soil is considered as organic as well as inorganic natural resource ?? Posted: 01 Nov 2016 11:21 PM PDT Which is basically called mixed resources but can't understand why? submitted by /u/learner892 [link] [comments]

[Physics] Are we absolutely sure that what we know about classical mechanics applies on Mars? Posted: 01 Nov 2016 07:33 PM PDT Kind of a random thing I started thinking about today doing my physics homework... I'm not sure if "classical mechanics" is the right term, but I basically mean the stuff you learn in your calculus based physics sequence (Kinematics/Rotational, Energy, Work, etc). Can you basically just replace the constants we use like g and start solving problems the same way? What about other branches of science? Thanks! submitted by /u/BeastftMiddleEast [link] [comments]

What is Invariant Space-time Interval and what ramifications does it have on our understanding of space-time? Posted: 01 Nov 2016 08:16 PM PDT I'm finding it hard to find any sources regarding this topic that I understand. Could anyone please provide a succinct explanation? Thanks. submitted by /u/CeraMixx [link] [comments]

What caused the first cell to split? Posted: 01 Nov 2016 09:44 PM PDT Pretty straight forward question... What caused the first cell that developed, to split or "reproduce", for a lack of a better term. Thank you. submitted by /u/Nope__Nope__Nope [link] [comments]

Is there a difference between how the human body processes added sugars vs naturally occuring sugars? Posted: 01 Nov 2016 07:00 AM PDT If there is a difference, is there a way to tell how those different sugars act on the human body, so basically which are healthy and which aren't and in what dosage? Would you suggest avoiding added sugars? However, none of the experts who spoke to WebMD advocated that people try to purge all added sugars from their diets. By itself, sugar is not a risky food, says Rae-Ellen W. Kavey, MD, MPH, a pediatrics professor at the University of Rochester School of Medicine and Dentistry. "The focus should be on a healthful approach," she says, "not people rushing to one side or the other." Article on WebMD submitted by /u/BodyFlyer [link] [comments]

I have a coin that I suspect flips heads 50.1% of the time, how many flips do I need to distinguish it from a coin that flips heads 50% of the time? Posted: 01 Nov 2016 04:00 PM PDT This is entirely hypothetical. I'm interested in understanding the statistical analysis involved, especially assigning confidence intervals. submitted by /u/glacierburrito [link] [comments]

What is "Nuclear Pasta" ? Posted: 02 Nov 2016 12:24 AM PDT submitted by /u/Kubrick_Fan [link] [comments]

Why doesn't gravity work on small scales? Posted: 01 Nov 2016 01:42 PM PDT Basically why aren't marbles around my house orbiting my body? Why aren't I "sucked" towards a large building when I walk by? I hope my question makes sense submitted by /u/ThePioneer99 [link] [comments]

Where do microscopic and macroscopic overlap? Posted: 01 Nov 2016 02:35 PM PDT There's clearly a difference between the two, but I was wondering if there's a known scale at which we see quantum effects begin to approximate classical terms submitted by /u/backflip7 [link] [comments]

What makes Carbon 14 (and other atoms) unstable? Posted: 01 Nov 2016 04:50 PM PDT I read that the reason atoms with high mass are unstable is because the strong nuclear force's range is too short to hold the protons and neutrons together. If this is the case then why is Carbon 14 unstable even though I think it's mass is too small for this effect to happen. So what causes it to be unstable? submitted by /u/BigJuicyMoistWetSlop [link] [comments]

What exactly is a psu efficiency rating and what does it measure? Posted: 01 Nov 2016 03:37 PM PDT Is it the loss of power when converting from receptical ac to dc, or is it something else? submitted by /u/Antfere [link] [comments]

What is the force acting between gas molecules that keeps them away from each other? (or) Why is air pressure so very homogenous? Why aren't gasses more... sloshy? Posted: 02 Nov 2016 01:39 AM PDT I recall from science classes in school that gas molecules are far less dense than solids/liquids, and that they're all flying around very quickly, but what is it about gas molecules that causes them to keep a certain average distance from each-other so effectively? My intuition constantly wants to see them act in the sloshy way that water vapor does, but clearly that is not the case; air pressure seems astonishingly uniform. I intuitively almost expect to suffocate if there is somehow not enough air in my little corner of the room. To give another example, if my window is open in my bedroom, my door is much easier to close, because apparently when the window is closed, it is very difficult to increase the air pressure in my room, even momentarily by a very small amount. Another mind-boggling example is sound waves even being possible: a tiny compression and rarefaction can be faithfully reproduced over great distances at 20kHz. That's amazing. Why are all the molecules so regularly spaced even as they fly around? If I turn on a speaker, why don't they just scatter willy-nilly? (And, it occurs to me, is that what would happen if I turned on a speaker at the top of earth's atmosphere?) submitted by /u/jakisan-FF [link] [comments]

Why does a liquid being poured out of a bottle not flow smoothly? Posted: 01 Nov 2016 03:03 PM PDT submitted by /u/TheeMagicPeanut [link] [comments]

Can an object collapse in on itself if it's thin enough? Posted: 01 Nov 2016 11:59 AM PDT If there were to be, say, a very thin piece of paper floating in an empty universe, would the gravitational force cause it to collapse in on itself, or would it remain still forever? submitted by /u/JamesonTheCanadian [link] [comments]

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What causes the patterns to appear in this maple syrup?

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• What causes the patterns to appear in this maple syrup?
• How and why acceleration of charged particles produce photons?
• [Physics] Is entropy quantifiable, and if so, what unit(s) is it expressed in?
• Is there a name for a set of equivalent sums of squares, a^2 + b^2 = c^2 + d^2?
• I am sitting in a boat in a lake of superfluid helium. Can I use oars to propel myself? What about propeller? Also, am I in danger of sinking?
• Is it possible for a planetary system to form without a star? If so, is it possible to detect them with our current technology?
• [Physics] Why did Madame Wu use Cobalt-60 in the parity symmetry violation experiment?
• Are there more electrons or protons in the universe (or are they equal)?
• Why does smog stay local rather than dissipate throughout the rest of the atmosphere?
• [Mathematics] Is there a mathematical proof for a relationship between n! and n^nth?
• How does an RNA 'know' which DNA strand to copy during transcription?
• If radio waves are a type of propagating wave and there are many going through the space around us, why do they not interfere constructively/destructively and distort radio signals received?
• Does an extremely fast orbital period have any practical repercussions for activity on the planet's surface?
• What physical/chemical property of a material decides if it will make a good superconductor?

What causes the patterns to appear in this maple syrup? Posted: 31 Oct 2016 09:03 AM PDT https://gfycat.com/DiligentHardKingfisher I've tried searching for maple syrup ripples/waves/evaporation/pattern but haven't found anything explaining this. I'm guessing it has to do with some of the water from the syrup evaporating, but not sure why it seems to dance around like this. submitted by /u/AmateurSunsmith [link] [comments]

How and why acceleration of charged particles produce photons? Posted: 31 Oct 2016 08:35 PM PDT Hi Sciencefolks, Given that acceleration of charged particles produce photons, and vice versa (how antenna and radios work), there are two parts of my question. How does it happen? Lets say an electron travelling at 1000 eV (initially went through a potential of 1000 V) stops in 10 seconds. How many photons will be emitted due to this deceleration, and of what wavelength? Assuming the electron is stopped by a wall of 1000 Volts. Why do charged particles acceleration produce photons? (This may be a teleological question, and may not have a physical answer, let me know if this is true.) Thanks in advance. submitted by /u/zurvanyazdi [link] [comments]

[Physics] Is entropy quantifiable, and if so, what unit(s) is it expressed in? Posted: 01 Nov 2016 07:55 AM PDT submitted by /u/echisholm [link] [comments]

Is there a name for a set of equivalent sums of squares, a^2 + b^2 = c^2 + d^2? Posted: 31 Oct 2016 05:43 PM PDT The numbers would take the form of: a2 + b2 = c2 + d2 I was playing with some numbers and found that squares of 11 generate this pattern often: 112 + 22 = 102 + 52 112 + 32 = 72 + 92 112 + 72 = 132 + 12 112 + 82 = 132 + 42 112 + 102 = 142 + 52 112 + 122 = 162 + 32 112 + 132 = 172 + 12 112 + 162 = 192 + 42 112 + 172 = 192 + 72 112 + 182 = 212 + 22 112 + 232 = 252 + 52 = 172 + 192 112 + 242 = 162 + 212 112 + 272 = 292 + 32 = 152 + 252 112 + 282 = 292 + 82 112 + 292 = 312 + 12 I'm guessing that these are similar to Pythagorean numbers and that there are an infinite number of them. Just the frequency it appears with 11 seemed interesting. submitted by /u/okayisrelative [link] [comments]

I am sitting in a boat in a lake of superfluid helium. Can I use oars to propel myself? What about propeller? Also, am I in danger of sinking? Posted: 31 Oct 2016 10:47 AM PDT submitted by /u/eterevsky [link] [comments]

Is it possible for a planetary system to form without a star? If so, is it possible to detect them with our current technology? Posted: 31 Oct 2016 05:31 PM PDT A different way to phrase the second question: Can we find planets without a star nearby to provide some sort of light to detect it with? submitted by /u/therealquestionss [link] [comments]

[Physics] Why did Madame Wu use Cobalt-60 in the parity symmetry violation experiment? Posted: 31 Oct 2016 08:44 PM PDT Why, of all elements (and isotopes), was Cobalt-60 used and are there other elements that could have been used? submitted by /u/BeeTris [link] [comments]

Are there more electrons or protons in the universe (or are they equal)? Posted: 31 Oct 2016 01:09 PM PDT submitted by /u/iLikePIeTM [link] [comments]

Why does smog stay local rather than dissipate throughout the rest of the atmosphere? Posted: 31 Oct 2016 03:12 PM PDT submitted by /u/Newcomer2the [link] [comments]

[Mathematics] Is there a mathematical proof for a relationship between n! and n^nth? Posted: 01 Nov 2016 02:12 AM PDT I was thinking about the two options, and how nnth should always be larger than n! for n>1, but I was unsure if the growth would fit into a simple equation. For instance, ( n!,nn . 2,4 . 6,27 . 24,256). Would I be right in guessing the first step of finding that relationship would involve dividing both by n? submitted by /u/HangsOutWithDave [link] [comments]

How does an RNA 'know' which DNA strand to copy during transcription? Posted: 31 Oct 2016 03:55 PM PDT Since RNA is single stranded, and each base codon codes for an amino acid, what DNA strand is copied greatly influences the protein being formed. If both strands had the chance of being copied then you could have two proteins being coded by one gene. Proteins which could have vastly different functions. Is my understanding correct? Bonus question: Also, since you have two copies of each gene along each chromosome? what determines which chromosome is copied? submitted by /u/AnthropomorphicPoppy [link] [comments]

If radio waves are a type of propagating wave and there are many going through the space around us, why do they not interfere constructively/destructively and distort radio signals received? Posted: 31 Oct 2016 12:23 PM PDT submitted by /u/Dr-Taco [link] [comments]

Does an extremely fast orbital period have any practical repercussions for activity on the planet's surface? Posted: 31 Oct 2016 10:14 AM PDT This question is inspired by this recently discovered planetary system. One planet has an orbital period of 27,000 years, and the other has an orbital period of just 11 hours! An 11-hour year seems incredibly fast. My question is whether such an immense speed affects what happens on the planet's surface. I'm wondering particularly about whether meteors are likely to hit it any harder, on average, than a planet that's orbiting more slowly. And a second (probably easier) question: would there be noticeable centrifugal forces on a planet orbiting it's sun that fast? Would this cause tidal forces, deformations, etc? submitted by /u/meltingintoice [link] [comments]

What physical/chemical property of a material decides if it will make a good superconductor? Posted: 31 Oct 2016 12:37 PM PDT For example I know certain ceramics make better superconductors (i.e. they exhibit the effect at higher temperatures) than any metals. Why is that? What property of a material decides whether it will undergo the Meissner effect? submitted by /u/wanker75 [link] [comments]

You are subscribed to email updates from AskScience: Got Questions? Get Answers.. To stop receiving these emails, you may unsubscribe now.	Email delivery powered by Google
Google Inc., 1600 Amphitheatre Parkway, Mountain View, CA 94043, United States

How many numbers a & b exist such that a^b = b^a? How many rational numbers? Integers? Or is there a way to prove that there is an infinite amount?

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• How many numbers a & b exist such that a^b = b^a? How many rational numbers? Integers? Or is there a way to prove that there is an infinite amount?
• If the Alps were created 50 million years ago from Africa and Southern Europe colliding, and raising what used to be a sea bed between them. Couldnt we search mountains for fossils earlier than the majority we find ?
• Has anyone computed the number of unique length "n" string of numbers in the "m"th decimal approximation of pi?
• How are rates of mountain growth calculated?
• After working as a dishwasher for a couple of weeks, my hands could handle a lot more / hotter water. How does the human body adapt to direct contact with heat?
• Genetics: During genetic drift, as alleles are lost, which increases? Homozygosity or Heterozygosity?
• Why does the iron in our food not react with acid and form hydrogen gas? If it does , how does it affect the body ?
• Are satellites engineered differently for specific planetary orbits?
• What is the oldest known case of Bi Polar Disorder, specifically manic episodes?
• How does General Relativity predict specifically the existence of Gravitational Waves?
• When you light a propane torch, why does the fire not also ignite the gas inside the canister?
• How are we able to store data in diamonds?
• Hoew much can we really tell about interbreeding of species just by looking at their DNA?
• Light Speed — Can we trust the measurements?
• Why do high temperatures denature enyzmes, but low temperatures do not?
• Why is the European Extremely Large Telescope projected to be operational for 10 years? Why even establish a limit before its even built?
• Conceptually, how does quantized energy resolve the UV Catastrophe?

How many numbers a & b exist such that a^b = b^a? How many rational numbers? Integers? Or is there a way to prove that there is an infinite amount? Posted: 30 Oct 2016 11:10 AM PDT ab = ba I'd assume there are a infinite amount of numbers and maybe even rational numbers. I'm more interested in integers. From what I've seen, it works when b = a (aka aa = aa), but that's a trivial solution. The only non trivial solution I found was 24 = 42. submitted by /u/StormStooper [link] [comments]

If the Alps were created 50 million years ago from Africa and Southern Europe colliding, and raising what used to be a sea bed between them. Couldnt we search mountains for fossils earlier than the majority we find ? Posted: 30 Oct 2016 08:21 PM PDT The title explains it all could we search mountains for amazingly ancient fossils given the nature of their creation? Thank you in advance submitted by /u/LambentGoku [link] [comments]

Has anyone computed the number of unique length "n" string of numbers in the "m"th decimal approximation of pi? Posted: 31 Oct 2016 07:36 AM PDT It is not known whether it is possible to find an arbitrary sequence within the decimal expansion of pi, or for that matter, some other transcendental answer (where the answer isn't trivially "no" like the Liouville constant). However, have people done any work to see if all strings below a certain length are present, and how the percentage of these strings that are present increases as you increase the number of digits in the decimal expansion of pi? I noticed in this site: http://www.angio.net/pi/piquery that has pi calculation to 200 million places and the probability a string of length "n" is present seems to drop by about a factor of 10 each time, essentially consistent with sampling from a random string. Essentially I want to know what work has been done, either analytically or numerically, to see if the expansion of pi behaves the same as a random string for the purposes of sampling. submitted by /u/somedave [link] [comments]

How are rates of mountain growth calculated? Posted: 30 Oct 2016 08:33 PM PDT submitted by /u/BigDrew42 [link] [comments]

After working as a dishwasher for a couple of weeks, my hands could handle a lot more / hotter water. How does the human body adapt to direct contact with heat? Posted: 30 Oct 2016 03:15 AM PDT submitted by /u/onzichtbaar [link] [comments]

Genetics: During genetic drift, as alleles are lost, which increases? Homozygosity or Heterozygosity? Posted: 30 Oct 2016 07:38 PM PDT I'm analyzing a paper for a piece of university coursework and one of the questions is asking me to identify an "important typographical error" in the main text of the introduction. My friends are struggling, but one of them things they have found it. But I'm not so sure. The sentence reads as follows: "As alleles are lost, homozygosity necessarily increases" Is this correct? Or is 'heterozygosity' meant to be in place of 'homozygosity? Or perhaps 'decreases' in place of 'increases'? Any ideas? Link to paper: http://www.d.umn.edu/~jetterso/Ecological%20Genetics/documents/NewmanandPilson1997Effectivepopulationsize.pdf Sentence can be found at the top of the second column, first page of introductory text. EDIT: Solved, Thanks submitted by /u/ZaneT_ [link] [comments]

Why does the iron in our food not react with acid and form hydrogen gas? If it does , how does it affect the body ? Posted: 31 Oct 2016 03:08 AM PDT submitted by /u/thexynapse [link] [comments]

Are satellites engineered differently for specific planetary orbits? Posted: 30 Oct 2016 04:38 AM PDT I'm currently doing an assignment on Mars colonisation and launching a GPS satellite system there. Would we have to engineer these satellites differently to make them orbit Mars in a way that could be used for GPS? I'm having trouble on finding any information about making different satellites for different planets, maybe I'm just bad at google, but if someone could provide some information (and hopefully sources?) it'd be greatly appreciated. submitted by /u/J3ST_eR [link] [comments]

What is the oldest known case of Bi Polar Disorder, specifically manic episodes? Posted: 31 Oct 2016 12:24 AM PDT How did people finally realize that it was a mental disorder and not (witchcraft or demons), and, what would happen to a person with an untreated manic episode in the wild. Is there any documentation in history of people following someone with it in history. Also, would it reverse, or get worse, or death if untreated? submitted by /u/Aguy00 [link] [comments]

How does General Relativity predict specifically the existence of Gravitational Waves? Posted: 30 Oct 2016 12:23 PM PDT All I can find is the simple claim that GR shows gravity propagating at finite speed, like any wave. I can't find any descriptive information beyond that. How do these waves form exactly? I've been browsing some of the LIGO recaps and seen claims that the system ejected 3 solar masses in the form of GW radiation. How does the theory of GR predict such radiation? There's also some claims where they relate GW propagation to accelerating bodies, but I can't find further information at all. Also something about "chirps" in the LIGO data being somehow important, which I'm reading more about now. Can anybody give some input to the relationship between GW's and the predictions of GR? submitted by /u/The_Sodomeister [link] [comments]

When you light a propane torch, why does the fire not also ignite the gas inside the canister? Posted: 30 Oct 2016 03:18 AM PDT Probably sounds like a stupid question to many but I'm struggling to imagine the science behind it. If you had a watering can full of petrol and lit the sprinkles of petrol coming out of the nozzle, you'd rightfully expect to have the can explode in flames. If you sealed the can, would that be any different? What about if you sealed the can and pressurised it? Does the pressure have to be high enough that the speed of fuel coming out of the nozzle is higher than the speed that the fire can move towards the fuel source? submitted by /u/randomusername1198 [link] [comments]

How are we able to store data in diamonds? Posted: 30 Oct 2016 02:22 AM PDT In reference to this post: https://www.reddit.com/r/worldnews/comments/5a4u4w/its_well_known_that_diamonds_are_extremely/ This is not the first time I've read about this but I never looked into it. What is the scientific logic behind being able to store data in diamonds? submitted by /u/ajs427 [link] [comments]

Hoew much can we really tell about interbreeding of species just by looking at their DNA? Posted: 30 Oct 2016 03:58 AM PDT Hi everyone, I just read this article called "Aboriginal Australians, Pacific Islanders carry DNA of unknown human species, research analysis suggests" which popped up in r/all. In this article they for example state: They found Europeans and Chinese people carry about 2.8 per cent of Neanderthal DNA. My question is how come the percentage is so low? Neanderthales and homo sapiens evolved from a common ancestor. Shouldn't we carry around 98%+ of the same DNA?(We and chimps have around 99% of DNA in common) Another question that popped up is whether having something genetically in common really means we did interbeed with the ancestor of this species. We can have proteins in common just because we evolutionary needed it to eveolve the same way(I have alcohol dehydrogenase in humans and fruitflies in mind). So in general how much can we really tell about interbreeding of species just by looking at their DNA? Thanks for all your answers in advance submitted by /u/g0lmix [link] [comments]

Light Speed — Can we trust the measurements? Posted: 30 Oct 2016 08:10 AM PDT I presume we use atomic clocks to time the speed of light, but how can we be certain that this is an accurate method of measurement if they themselves are make use of these "electromagnetic waves" to time periods of time. Doesn't that falls into a circular reasoning thing? Making use of something that travels at the speed of light to measure the speed of light? submitted by /u/heedme [link] [comments]

Why do high temperatures denature enyzmes, but low temperatures do not? Posted: 30 Oct 2016 06:18 AM PDT submitted by /u/CamBamBoomSlam [link] [comments]

Why is the European Extremely Large Telescope projected to be operational for 10 years? Why even establish a limit before its even built? Posted: 30 Oct 2016 02:35 AM PDT So apparently the E-ELT will be operational from 2024 until 2034. Are they already planning on building a new one ready for 2034? submitted by /u/launcher87 [link] [comments]

Conceptually, how does quantized energy resolve the UV Catastrophe? Posted: 29 Oct 2016 08:00 PM PDT I understand the mathematics of why it works out like this, but can't wrap my head around it conceptually. Rayleigh Jean's law implies that a black body will radiate infinitely intense light for arbitrarily small values of the wave length: Intensity p(f) = (8πkTf2 )/c3 approaches infinity as wavelength approaches 0. This obviously isn't true because we aren't all getting burnt to a crisp. And, as I mathematically understand it, introducing discrete energy values E = nhf results in the proper equation: p(f) = (8πhf3 /c3 )(1/ehf/kt -1) so that intensity approaches 0 for smaller wavelengths, and peak intensity is at the center of the distribution just as observed in actual black bodies. Physically, though, what is going on that causes this? What I'm thinking is that, because the energy values are discrete, it's a less common occurrence for the oscillators to emit shorter wavelength photons because that represents an electron's long fall from higher energy levels to lower ones, and it's just more common for it to fall through less energy levels. Is this explanation anywhere close to what's going on? And, let's for a second imagine that the UV Catastrophe was true, and the universe is classical in this regard. What is the inverse of my question? What causes there to be seemingly infinite energy in the black body lacking quantization despite not having an infinite temperature? Also, how exactly did Planck derive the quantum intensity equation once he assumed quantized energy: p(f) = (8πhf3 /c3 )(1/ehf/kt -1) ? submitted by /u/cosekantphi [link] [comments]

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