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Saturday, August 5, 2017

Does smoke from a wildfire lower temperature in surrounding areas?

Does smoke from a wildfire lower temperature in surrounding areas?


Does smoke from a wildfire lower temperature in surrounding areas?

Posted: 04 Aug 2017 06:32 PM PDT

Living in British Columbia and with the current wildfires that are going on, does the smoke somewhat cool the area? On Wednesday and Thursday, the forecast predicted the temperature to be nearly 100F but felt like mid-high 80s instead. Where I live is currently engulfed from the smoke. Does this cool the earth by reflecting the heat rays back into the atmosphere/space?

submitted by /u/BALDWIN_ISNT_A_PED
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What are the effects of alcohol on human brain development on people ages 18-24?

Posted: 04 Aug 2017 09:18 PM PDT

As a college student, I watch a lot of binge drinking and I've gone to my share of parties too. I've heard a lot through school about how alcohol stunts development in young people. To what degree is this true, especially in the young adult age group where people are mostly done developing physically.

How much do different levels of drinking harm different age groups? (A few drinks every weekend vs once a month vs heavy regular binge drinking). I feel like there are a lot of biased answers on this topic so I'd love to see your sources!

submitted by /u/searchandrescuespoon
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Many fruit are green before ripening, is this colour due to chlorophyll? If it is are the unripe fruit involved in photosynthesis?

Posted: 05 Aug 2017 04:23 AM PDT

What's up with the Normal/Gaussian Distibution? What properties does it have that make it special? Does does one arrive at its probability density function?

Posted: 04 Aug 2017 05:04 PM PDT

Does splitting an atom expel radiation? If not where does the radiation from nuclear explosions come from?

Posted: 05 Aug 2017 03:21 AM PDT

Why were prehistoric animals so big, and after they went extinct, why did new animals not grow to such enormous sizes?

Posted: 04 Aug 2017 09:04 PM PDT

Why is it that the "first round" of animals on the planet were so large, but after they all went extinct, new animals did not evolve into such huge creatures?

submitted by /u/WannaD8MyFrog
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Why does fire change colour with certain chemicals inside it?

Posted: 04 Aug 2017 02:58 PM PDT

How does transmitting sound through radio waves work?

Posted: 05 Aug 2017 01:29 AM PDT

Could someone explain to me the physics of the waves when sound is transmitted and broadcast onto radio waves? How exactly do the two waves interact in such a way that the sound travels with the radio waves completely intact?

Also how do radio frequencies that are close to each other not interfere with each other?

submitted by /u/IWANNALIVEEEEE
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Is there such a thing as absolute electric potential?

Posted: 05 Aug 2017 06:37 AM PDT

let's say I have three metal plates, let's call them A B C, and a voltage source.

I put A and B very very close to each other, and I use the voltage source to charge them like a capacitor, let's say A is positive.

Then I remove the source and separate the plates.

What are the potential differences between A and B and C?

C's potential is 'unchanged' from its ground state. Is there some absolute potential (let's say zero?) that I can assign to it? Does this mean the B is negatively charged in some absolute sense?

At this point I have a slightly positive A and a slightly negative B... Do their chemistries change because the number of electrons available has changed?

submitted by /u/7Geordi
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Why do I only hear bass and low tones outside of clubs and shows?

Posted: 04 Aug 2017 04:27 PM PDT

I'm super curious as to why it seems like no treble or high pitches can make it through to the outside, and why the music sounds so muffled.

submitted by /u/vondage
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Why is water compressible?

Posted: 05 Aug 2017 04:13 AM PDT

The general assumption is that water is incompressible. However, many sources (and many questions/answers here) say that in fact it is compressible, but only very slightly

What I didn't see explained yet is: Why is water compressible at all? What part of water is able to "take less space" under high pressure?

submitted by /u/WGP_Senshi
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What impact do coffins and embalming have on the earth instead of decomposition?

Posted: 04 Aug 2017 10:09 AM PDT

According to the ecology global network, 55.3 million people die every year. I haven't found any numbers regarding coffins, but I am imagine that many people use some method of embalming or preservation when they die. I also have to imagine that a body decaying naturally in the earth has much more nutritional, beneficial properties for the earth than a body sealed in a box or one that is embalmed.

I might be asking this question in the wrong manner, if so I apologize. My primary interest in this question regarded the current state of the earth. Whether or not global warming or just about anything can or could be altered by this coffin phenomena.

submitted by /u/winnercakesall
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How come when I am driving fast, stationary objects make a woosh sound as I pass by them?

Posted: 04 Aug 2017 02:17 PM PDT

What is the evidence that I.Q tests measure intelligence?

Posted: 04 Aug 2017 07:40 AM PDT

How do we know that the Universe's law or constants never change?

Posted: 04 Aug 2017 12:04 PM PDT

If all we know is from comparing the universe against itself, how can we actually know that our various discoveries on how the universe operate can't ever change? It goes against human instinct for sure, but has science actually proven that the universe isn't able to change itself?

And since theories that the universe might be a computer simulation are becoming popular I feel this question is becoming even more relevant. In that case anyone outside the simulation could change the constants (for example, alter the speed of light slightly) at any time.

But even outside easy-to-imagine ways in which the universe could have its constants changed, has science ever backed up the nearly-universal assumption that these constants couldn't change?

submitted by /u/lacertasomnium
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How do the antibodies in a blood donors blood behave in the blood recipients body?

Posted: 04 Aug 2017 02:51 PM PDT

So obviously blood type is selected against the antibody response of a recipient using the ABO+/- system, therefore the donor must be screened for antigens that could induce an antibody response in the recipient. My question is what about the antibodies present in the donor blood? My intuition is that isolation from its origin lymphatic system blocks the antibodies from initiating any significant response as the recipients immune system could possibly be unresponse to the foreign antibodies. With that being said, certainly some free floating donor antibodies must react with the antigens in the recipient when receiving the blood. Does this simply occur in a negligible quantity without the lymphatic memory response to proliferate the defense?

An example being an AB recipient receiving O blood ought to trigger a double rejection by the donor bloods limited antibodies to the recipients system, similar to if an O recipient received AB donor blood.

submitted by /u/robindawilliams
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How high up the atmosphere can Carbon Dioxide go?

Posted: 04 Aug 2017 03:39 PM PDT

School Books taught me that Carbon Dioxide create a barrier of some form that keeps heat from leaving the planet. So which part of the Atmosphere does this "barrier" take form?

Also, can Carbon Dioxide get blasted off from earth by the sun?

submitted by /u/AoiMizune
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What's the efficacy of antidepressants when compared to placebos in clinical studies?

Posted: 04 Aug 2017 06:27 AM PDT

When they measure the distance between objects like planets and suns, at what point do they start the measurement?

Posted: 04 Aug 2017 06:45 AM PDT

Do they start at the center of the planet and how do they handle elliptical orbits?

submitted by /u/_an_average_guy_
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What is the difference (if any) between looking at the solar eclipse and just looking at the sun?

Posted: 04 Aug 2017 03:01 PM PDT

Everybody and their brother is freaking out about buying special eye protection for the solar eclipse. Is there something different about a solar eclipse that makes it especially damaging to peoples eyes? Why or why not?

submitted by /u/BigBeaver2
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How much do we know about the physical properties of different antimatter?

Posted: 04 Aug 2017 12:42 PM PDT

I was reading about anti-hydrogen. Presumably, you could have antimatter in the form of anti-x element. But, do we know whether the antimatter versions of the things would have the same kind of physical properties? I.e., is anti-hydrogen a gas? Would anti-copper be a metal? Is anti-copper possible? Do we know?

edit: Thanks!!!

submitted by /u/dillonsrule
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Why does using a propane tank make it get cold?

Posted: 04 Aug 2017 02:02 PM PDT

What would happen to a rocket if it launched straight up and didn't turn sideways?

Posted: 04 Aug 2017 08:22 PM PDT

I understand that rockets turn sideways a bit after they are above most of the atmosphere to gain orbital speed, but what if it didn't turn? I assume that the rocket can still get to space just from sheer thrust. If it kept going and stopped around the ISS orbit, would it just fall back or start to orbit?

submitted by /u/lordDAmaster
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Friday, August 4, 2017

Why does ice stick to metal spoons?

Why does ice stick to metal spoons?


Why does ice stick to metal spoons?

Posted: 04 Aug 2017 03:28 AM PDT

How does the Sun send out EM radiation across the spectrum? Doesn't every frequency require a different process to happen?

Posted: 03 Aug 2017 03:52 PM PDT

Do how come plane propellers don't torque planes out of balance?

Posted: 03 Aug 2017 08:11 PM PDT

Helicopters need a tail propeller to counteract the torque that is applied from the blades. But old biplanes are an example of a planes that only have one propeller so shouldn't the plane be off balanced by the torque applied to the propeller only in the opposite direction?

submitted by /u/theycallmefuckoff
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How does fire spread?

Posted: 03 Aug 2017 03:50 PM PDT

Does fire spread, or does the heat from the previous flame match the autoignition temperature and make more flames?

submitted by /u/BariumSodiumNa
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Why do worms come out of the ground onto the footpath when it's raining?

Posted: 03 Aug 2017 03:12 PM PDT

Whenever it rains, the footpaths in my neighbourhood are covered with hundreds of worms. Why do they come out of the dirt to lay on these hard wet surfaces?

submitted by /u/Algernon_Asimov
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With a seemingly MASSIVE amount of historical data on all sorts of inputs, what is still holding us back from extremely accurate weather modeling?

Posted: 03 Aug 2017 07:05 AM PDT

Dumb question, but if water is a bad conductor of electricity, then why do hair dryers and other bathroom appliances have warnings about not using them in water?

Posted: 03 Aug 2017 08:15 PM PDT

I learned from chemistry class two years ago that water isn't a good conductor of electricity due to its inability to create ions. With that in mind, where is the danger (besides the ones obviously depicted on warnings) in water making contact with bathroom appliances? Do the metal parts and wiring pose a bigger threat, perhaps?

(I'll delete this question if it's too rudimentary, but the thought of this popped into my head recently and I don't quite recall my chemistry too well)

submitted by /u/K4M1K4ZE
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How exactly are neutrinos and dark matter related?

Posted: 03 Aug 2017 06:41 PM PDT

Why do rockets fly upwards instead of sideways like a plane lifting off ?

Posted: 03 Aug 2017 01:47 PM PDT

What makes meth labs so dangerous?

Posted: 03 Aug 2017 05:16 PM PDT

It's widely known that meth labs are practically ticking time bombs, but what actually causes the explosion?

submitted by /u/biggestsnake
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What could be done to increase the phase velocity of axons?

Posted: 04 Aug 2017 03:13 AM PDT

Is there any credibility to the Solutrean hypothesis?

Posted: 03 Aug 2017 11:35 AM PDT

A lot of people distort the hypothesis of humans crossing the Atlantic Ocean through an ice bridge from Eurasia into North America with their own, contemporary political or social biases. Putting that aside, is there any credible evidence that shows whether the Solutrean people could have come to North America and become the Clovis people, or has that hypothesis been discredited?

submitted by /u/filipinonugget
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If space shuttles and other spacecraft need heat shields to make it through the friction of atmosphere re-entry, why don't you need special suits when skydiving?

Posted: 03 Aug 2017 09:14 PM PDT

I'm assuming it has to do with the size and speed/terminal velocity of the object, but I'd like more detail

submitted by /u/RyanTheTechie
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How do ponds and lakes form?

Posted: 03 Aug 2017 04:04 PM PDT

I kind of understand how lakes formed in the northern hemisphere by glaciers, but what about other ways they can form, and I just do not know how ponds form in the first place.

submitted by /u/Alkazei
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What protects astronauts from the acoustic shock of a rocket launch?

Posted: 03 Aug 2017 10:49 AM PDT

From what I understand, the safe distance from a rocket launch is usually over a mile away. So what protects the astronauts from the harsh vibrations?

submitted by /u/johnnyseal27
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If the sky is blue because it's a short wavelength, but rain bows have violet, why isn't the sky violet?

Posted: 03 Aug 2017 07:05 PM PDT

Is it possible for there to be a planet whose moon rotates around it perfectly to where you could only see the moon if you were on the other side of the planet?

Posted: 03 Aug 2017 05:51 PM PDT

I know that our moon rotates perfectly to where we can only see one side of it but I had never heard of a planet where the moon rotates fast enough to where you would have to trek across the planets surface to the other side in order to actually see it. Is it possible to have a planet/ moon interaction like this?

submitted by /u/Login__Failed
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Why is it that no matter how much liquid goes into a toilet, the water level always stays the same? (if it's not blocked of course)

Posted: 03 Aug 2017 07:28 AM PDT

How did plants pollinate on early earth?

Posted: 03 Aug 2017 04:15 AM PDT

This is kind of a two parter. How did plants pollinate during the dinosaur era of bees weren't around? And earlier than that; how did the first plants on land get pollinated?

submitted by /u/Apllejuice
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How damaging are submarine lights to deep sea animals' eyes?

Posted: 03 Aug 2017 03:52 PM PDT

Thursday, August 3, 2017

Why Do Certain Chemicals Cause Different Individuals To Experience Similar Complex Thoughts/Hallucinations? Where Is The Information Coming From?

Why Do Certain Chemicals Cause Different Individuals To Experience Similar Complex Thoughts/Hallucinations? Where Is The Information Coming From?


Why Do Certain Chemicals Cause Different Individuals To Experience Similar Complex Thoughts/Hallucinations? Where Is The Information Coming From?

Posted: 03 Aug 2017 12:20 AM PDT

So, I've come across 2 chemicals that regularly cause people to all have similar complex hallucinations.

  1. Tetraethyllead - when workers were exposed to hazardous concentrations of the chemical, they contracted lead poisoning, but all reported having a similar hallucinations of "being eaten alive by butterflies".

  2. DMT - many uses report seeing "machine elves" when they are hallucinating.

My question is: these aren't merely symptoms like stomach pain, or generalized hallucinations like seeing flashing colors, etc. These are complex thoughts. How is it that different people can all experience the same complex thoughts from a simple chemical? Clearly the information isn't being transmitted by the chemical itself... but it's almost more unlikely that the same information is present in everyone's brain waiting for the chemical to trigger it. Such would suggest that everyone has the same "I'm being eaten by butterflies" receptor in their brain, waiting to be activated by TEL.

Or is it just that these drugs all affect the brain in some simpler way and everyone just has the same predictable way of making sense of the hallucinogenic effects? But then what's there to differentiate one hallucinogen from another? Why does DMT cause people to hallucinate "machine elves", but other hallucinogens don't?

submitted by /u/Suozlx
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Does a multi-decade concentration of Radon gas lead to an accumulation of lead particles in an enclosed environment (basement)?

Posted: 03 Aug 2017 06:09 AM PDT

I was looking at the decay chain for Radon, and noticed that the first stable element in the chain is lead 210.

So if a basement, for example, has high Radon levels for, say 100 years, would that create a higher than normal concentration of lead in that enclosed environment?

submitted by /u/kickturkeyoutofnato
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How do we distinguish an evolutionary trait from a genetic anomaly?

Posted: 03 Aug 2017 05:41 AM PDT

Are bats leaving a cave able to distinguish their individual "chirps" from one another or does the accumulation of all the "chirps" create a sonic map for all the bats?

Posted: 02 Aug 2017 06:49 PM PDT

Can we have twin planets like we have twin stars?

Posted: 03 Aug 2017 03:34 AM PDT

How would they circle eachother and their respective star(s)?

submitted by /u/Moshkown
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Is there a specific reason why the genus Echinops is so popular with various pollinating insects?

Posted: 03 Aug 2017 12:45 AM PDT

The Echinops Genus

Picture with, bees, bumblebees, wasp and a fly.

submitted by /u/MC_Kloppedie
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Whats happening when bread goes stale?

Posted: 03 Aug 2017 04:59 AM PDT

What would a finite positively curved universe mean for the twin paradox?

Posted: 02 Aug 2017 05:54 PM PDT

So my understanding of the twin paradox is that there are two twins, A and B, A stays on earth and B goes off on a spaceship at 99% the speed of light. From A's perspective, B is travelling at 0.99C, and so clocks on B's spaceship are running slowly, meaning B ages less. But from B's perspective, A is travelling at 0.99C in the opposite direction, meaning B sees these effects happening to A instead. From both reference frames, the other twin is ageing slower, and so the paradox asks: who has aged less when the twins are reunited.

The solution to this paradox is that B has to accelerate in order to turn around and come back home. This acceleration means that B is no longer in an inertial reference frame, and so this solves the paradox.

BUT. In a positively curved universe, you would not need to turn around and accelerate to come back home. If you travel in one direction for long enough, you would end up back where you started, the same way an ant walking around the surface of a sphere in one direction would end up back where it started. Who would be older and younger when twin B arrives back at earth?

submitted by /u/Kelan_
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I where do they electrons in circuits come from? Are they in the metal or not bound to anything?

Posted: 03 Aug 2017 03:07 AM PDT

How have continents survived plate tectonics for this long?

Posted: 02 Aug 2017 08:59 PM PDT

If plate tectonics "recycles" the Earth's crust by subsuming and melting down plates, and then generating new material elsewhere, how the heck have the continents/plates as we know them survived so long?

I remember seeing a map of Pangaea breaking up (something like this: pic) and being amazed that basically every recognizable landmass on Earth just basically slides around from one place to another, nothing lost, nothing gained.

I dug around a bit on Wikipedia for other supercontinents. The 1.59 billion year old "Columbia" has much, much less recognizable land (pic#/media/File:Paleoglobe_NO_1590_mya-vector-colors.svg)) but still, there are many parts that still exist on Earth.

What am I missing here? How do parts like Greenland, West Africa, and Antarctica move north, south, east, and west all over the freaking globe for 1.59 billion years without being recycled?

submitted by /u/wankbollox
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Why does it take energy to make things colder if this process is removing energy?

Posted: 02 Aug 2017 04:46 PM PDT

Theoretically could this energy be harvested rather than just absorbed into a chemical reaction?

submitted by /u/pud_
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[Biology] Do all nautiluses have the same number of tentacles on their face?

Posted: 02 Aug 2017 07:45 PM PDT

is the number different by age or gender?

submitted by /u/sucrerey
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Why does baking soda expire?

Posted: 02 Aug 2017 08:22 PM PDT

Why does Pi go on forever?

Posted: 02 Aug 2017 06:51 AM PDT

How long is the actual process of supernova explosion?

Posted: 02 Aug 2017 09:03 AM PDT

So we have the well known Betelgeuse star which is getting close to a supernova stage. My question is, how fast is the actual process? I know that it is probably a bad question since the actual explosion takes only a few moments but I want to know for example how long will it take from the actual explosion (visible from earth) to it expanding over let's say 1 degree in the sky?

submitted by /u/RudaBaron
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Do all currently-living things share a single common ancestor?

Posted: 02 Aug 2017 09:41 PM PDT

I know that generally all life is thought to have a Last Universal Common Ancestor, but was that most likely a single individual? Or is it more likely that early primordial life arose via multiple events, and therefore no matter how far you go back there are currently-living organisms that never shared an ancestor?

EDIT: added a word

submitted by /u/Trent_A
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How is it that you can compress TBs of data into small easy to move zip files? Shouldn't the data take up the same amount of memory all the time?

Posted: 02 Aug 2017 10:45 AM PDT

I don't get how you can make data take up less space even though it is the same amount of information.

submitted by /u/CustomVox
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How did Venus acquire its dense atmosphere?

Posted: 02 Aug 2017 11:18 AM PDT

How did Venus' atmosphere get so dense and volatile?

submitted by /u/READERmii
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Why do out of tune instruments that play together create those weird pulses?

Posted: 02 Aug 2017 01:02 PM PDT

How and why does entropy change during adiabatic magnetisation and subsequent demagnetisation?

Posted: 02 Aug 2017 12:05 PM PDT

I am an A-level student trying to do some wider reading and came across the magnetocaloric effect. I was reading this article and got confused in the first paragraph where is is stated:

the isothermal compression of a gas (we apply pressure and the entropy decreases) is analogous to the isothermal magnetisation of a paramagnet or a soft ferromagnet (we apply H and the magnetic entropy decreases), while the subsequent adiabatic expansion of a gas (we lower pressure at constant entropy and temperature decreases) is equivalent to adiabatic demagnetisation (we remove H, the total entropy remains constant and temperature decreases since the magnetic entropy increases).

I suppose I was mostly wondering why the temperature decreases instead of the total entropy during demagnetisation but was also wondering how to conserve entropy in both the adiabatic expansion of a gas as well as in demagnetisation. Thanks in advance.

P.S: Any good recommendations on places to start on becoming familiar with thermodynamics (so I don't have to pester you guys) at a level appropriate to me would be greatly appreciated.

submitted by /u/destroyerking492
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