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Thursday, October 25, 2018

Do tall people have larger internal organs? If not, how do their bodies fill the extra space?

Do tall people have larger internal organs? If not, how do their bodies fill the extra space?

Do tall people have larger internal organs? If not, how do their bodies fill the extra space?

Posted: 24 Oct 2018 11:59 AM PDT

AskScience AMA Series: Hi! I am J.R. Skok. I am a planetary scientist with the SETI Institute and a Space entrepreneur. I am working with SETI and NASA to develop future missions to search for life on Mars, AMA!

Posted: 25 Oct 2018 04:00 AM PDT

Hi! I am J.R. Skok. I am a planetary scientist with the SETI Institute and a Space entrepreneur. I am working with SETI and NASA to develop future missions to search for life on Mars, map out the minerals and geologic history of that planet while leading expeditions to Mars analogs around the world, including Antarctica, Iceland, Hawaii and more. As a Space Entrepreneur, I founded the company, Made of Mars, to develop the technology and economics needed to build things from the materials we can find on Mars, the Moon and asteroids throughout the solar system and share that journey with you!

Proof: https://i.redd.it/vi9rdud0p0t11.jpg

I will be on at 10am PT (1 PM ET, 17 UT), AMA!

submitted by /u/AskScienceModerator
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If an electron goes around the nucleus in a "probability cloud" and that the electron disappears and reappears in existence, does it mean that the electron appears at infinite positions around the atom or does it just orbit the atom? Also why does the electron not fall into the nucleus?

Posted: 25 Oct 2018 03:09 AM PDT

Why are tyres so wide?

Posted: 25 Oct 2018 03:32 AM PDT

We all know the static friction equation, F≤μ⋅R where μ is the dimensionless Coefficient of Friction and R is the Reaction force of the Asphalt on the tyres.

Note how area does not feature. This makes sense because force R spread over a large area would have low pressure. This would cause less friction per area, but as there is more area to have the force, area cancels out exactly.

This leads me to my question. Racecars, sports cars and special cars like the Formula 1 Williams FW08B all have methods to increase wheel area on the floor, stating increased grip. What is the reason behind these decisions? Is it static friction or something else, like cornering?

Thanks - Oli.

submitted by /u/olisharris
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What is the speed of heat? What factors can impact it?

Posted: 25 Oct 2018 01:56 AM PDT

It occurred to me during this annual festival I attend, theres a giant stage with a DJ and pyro technics. It happens this time of year when its cool so just walking by, from a pretty far distance, you can feel the heat hit you as soon as they fire. They just do a short, like 1 second burst, every few minutes. But I can feel it almost instantly. So it makes me wonder, what is the actual speed of heat? We know the speed of sound and light, which this also creates, but how fast is the heat traveling from that flame to my face? How much does it depend on the type of heat? A fire vs in home heating. Thanks.

submitted by /u/profstarship
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Why do atoms in electron microscope images always look spherical, instead of p- or d-orbital shaped?

Posted: 24 Oct 2018 10:02 PM PDT

Why don't the microscope's imaging electrons interact or scatter off of the sample's electrons in p orbitals? Or d orbitals? Or any of those other interestingly shaped orbitals I was taught electrons can take? The images always show the atoms as relatively spherical blobs (s orbitals).

submitted by /u/Bellgard
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What was Planck's intuition behind the quantization assumption?

Posted: 25 Oct 2018 12:05 AM PDT

 First of All, I doubt there has ever been any new idea that did not involve intuition. However, most textbooks suggest that the quantization assumption (Energy can only be absorbed or radiated in form of a discrete quanta: E=hf , and the atomic oscillator can only vibrate by a given discrete quanta of energy) was just a mathematical trick, that Planck introduced to be able to drive his distribution law. Is this the only right way to think about it? If not, did Planck really have intuition behind quantization idea?
submitted by /u/karim-mohie
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How does the body eliminates fat tissue?

Posted: 24 Oct 2018 05:23 PM PDT

I have been changing my life style, eating habits and exercising more. And it made me wonder, how does my body eliminates the fat issue previously stored?

submitted by /u/RealGimba
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Why are the planetary orbits always presented as all being in the same plane? Are the 8 planets really all in the same plane? Are other planes of movement around the sun expected?

Posted: 24 Oct 2018 08:53 PM PDT

Can antiretroviral medicine be used to treat a broad spectrum of sexually transmitted (say HSV or HPV) infections, or is it used specifically to treat HIV?

Posted: 24 Oct 2018 06:56 PM PDT

Are there any cultures that don't tell their children known fictitious folk tales (Santa Clause, Easter Bunny, etc.)? If so, what are the positive/negative effects?

Posted: 24 Oct 2018 10:37 AM PDT

What are solar flares called when they're on a different star?

Posted: 24 Oct 2018 05:42 PM PDT

What are sunspots and solar flares called when they happen on a star other than the Sun? Both of these names seem specific to our Sun.

submitted by /u/ChesterDaMolester
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How would breaking of CPT symmetry collapse QFT and Theory of Relativity?

Posted: 24 Oct 2018 10:06 AM PDT

Veritasium in this video mentions the consequences if CPT symmetry breaking is discovered. If CPT is found to be broken by particle interactions, then we'd have to reconstruct QFT and relativity theories. Why? and what are the other assumptions for these theories?

submitted by /u/lordofdkimgs
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How exactly is "turbulence" one of the last unsolved problems in classic physics, and how is it related to the Navier-Stokes equations?

Posted: 24 Oct 2018 10:59 AM PDT

I have read that Feynman said that turbulent flow was "the most important problem still left in classical physics".

In what sense it is a "problem"? Does he mean that we cannot predict turbulence exactly in every situation, and therefore it is considered "unsolved"?

What would it mean for the problem of turbulence to be solved, that we can describe it perfectly mathematically? Or that we can predict the exact patterns of turbulence when any force of any kind is applied to any fluid?

Also, how does this relate to the idea of "smooth solutions" to the Naver Stokes equations?

submitted by /u/ChongoChongo
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Have there been any significant changes in political polling methodology since the 2016 election?

Posted: 24 Oct 2018 11:05 AM PDT

As I look at different political polling data for the current election I got wondering if there have been any significant changes in political polling methodology since the 2016 elections. The polling was so off target for the previous election I'm wondering the information I'm looking at now is equally unreliable.

Basically I'm asking what methodological changes have taken place, if any, since the last election? Do we know if the current set of data is more reliable? Also curious as to why the 2016 polling data was so off? Thanks.

submitted by /u/FuelModel3
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Why does wine taste better when it “breathes”?

Posted: 24 Oct 2018 10:08 AM PDT

Is someone trying to develop electric airplanes?

Posted: 24 Oct 2018 02:37 PM PDT

Planes flying around make up some of the carbon emissions that speed up climate change. Is anyone trying to design electric planes? What are the major issues with them that we need to solve before it could be possible? Is there even a point to try or would it cause some other possibly bigger problem?

submitted by /u/Jnsjknn
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What's the most fundamental way we can define temperature?

Posted: 24 Oct 2018 09:14 AM PDT

I had always approached temperature with the definition of being the root mean square of all the kinetic energy in a system, but my physics TA told me that this was actually a rather childish definition, and that a more accurate definition was that temperature was a sum of all the possible microstates of a system, or something like that, which to me sounded more like entropy than the temperature that I knew in real life. Fundamentally speaking, what is temperature?

submitted by /u/_Sunny--
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vào lúc No comments:

Wednesday, October 24, 2018

Do countries where people commonly wear face masks when sick have much fewer cases of flu or common colds than others?

Do countries where people commonly wear face masks when sick have much fewer cases of flu or common colds than others?

Do countries where people commonly wear face masks when sick have much fewer cases of flu or common colds than others?

Posted: 23 Oct 2018 08:19 PM PDT

How much energy is contained within a strike of lightning?

Posted: 23 Oct 2018 11:14 PM PDT

If there is little to no friction or gravity in outer space to slow an object down, how come a space shuttle has a maximum speed? (Apparently around 28,000 kilometers per hour). Why can’t a spaceship continue to build momentum to reach up to light-speed?

Posted: 23 Oct 2018 09:43 PM PDT

During the immune response immediately following a flu shot, are our bodies more susceptible to other bacterial or viral infections, such as the common cold?

Posted: 23 Oct 2018 08:08 PM PDT

Ask Anything Wednesday - Engineering, Mathematics, Computer Science

Posted: 24 Oct 2018 08:12 AM PDT

Welcome to our weekly feature, Ask Anything Wednesday - this week we are focusing on Engineering, Mathematics, Computer Science

Do you have a question within these topics you weren't sure was worth submitting? Is something a bit too speculative for a typical /r/AskScience post? No question is too big or small for AAW. In this thread you can ask any science-related question! Things like: "What would happen if...", "How will the future...", "If all the rules for 'X' were different...", "Why does my...".

Asking Questions:

Please post your question as a top-level response to this, and our team of panellists will be here to answer and discuss your questions.

The other topic areas will appear in future Ask Anything Wednesdays, so if you have other questions not covered by this weeks theme please either hold on to it until those topics come around, or go and post over in our sister subreddit /r/AskScienceDiscussion , where every day is Ask Anything Wednesday! Off-theme questions in this post will be removed to try and keep the thread a manageable size for both our readers and panellists.

Answering Questions:

Please only answer a posted question if you are an expert in the field. The full guidelines for posting responses in AskScience can be found here. In short, this is a moderated subreddit, and responses which do not meet our quality guidelines will be removed. Remember, peer reviewed sources are always appreciated, and anecdotes are absolutely not appropriate. In general if your answer begins with 'I think', or 'I've heard', then it's not suitable for /r/AskScience.

If you would like to become a member of the AskScience panel, please refer to the information provided here.

Past AskAnythingWednesday posts can be found here.

Ask away!

submitted by /u/AutoModerator
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How do inter-species animals know when they are playing?

Posted: 24 Oct 2018 07:49 AM PDT

I've seen a lot of aww videos and YouTube links of inter-species friends. Even some weird ones like the lioness that adopted a... gazelle?whatever it's prey is.
Anyways, I know or I've heard that dogs "sneeze" at each other when they are rough playing, as an indication to the other dog like "hey I'm JK".
But I'm wondering, how can they communicate when they aren't 2 dogs. Say a cat and a raven or a dog and a cheetah.

submitted by /u/Nghtmare-Moon
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With current and relatively futuristic technology, would it be possible to create a type of exercise equipment or something similar in your home to supply your house with all the energy it would need for the day or next couple days?

Posted: 23 Oct 2018 07:31 PM PDT

Would a near light speed electron that collided with a potential barrier have a higher chance of quantum tunneling due to the barrier being thinner in the electrons frame?

Posted: 23 Oct 2018 11:50 AM PDT

Im only 3 weeks into my special relativity module so I am still very confused on alot of the concepts. I asked my lecturer about this and he answered to the best of his knowledge. He also told me if I wanted to know more i should have a look at quantum field theory. I also understand that special relativity and quantum dont like to get along with each other.

submitted by /u/JakiroFunk
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Why is it that path difference due to reflection when light travels from a medium with low index of refraction (n) to a medium with a higher index of refraction is always exactly 180 degrees regardless of how much higher the 2nd n value is?

Posted: 23 Oct 2018 11:28 PM PDT

for example if light travels from air n=1.06 to water n=1.33 that phase difference due to reflection will be 180 degrees because the light got slower. if it goes from air to oil n=1.50 the phase difference is still 180 degrees even though it's going even slower than it was in the water.

Also why does it only change if it goes from low n to higher n? why not also from higher n to lower n?

submitted by /u/CptSnowcone
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Why in some systems mechanical energy is constant and in others momentum is conserved?

Posted: 24 Oct 2018 01:19 AM PDT

Why was the Black Sea historically a freshwater body?

Posted: 23 Oct 2018 01:53 PM PDT

This is a question that came up in an r/history thread (here), where the explanation for the ship's preservation given is that the Black Sea is essentially a freshwater body with a saltwater cap. I know that similar meromictic compositions occur in other water bodies with poor internal circulation (e.g. Lake Tanganyika), but this raises an interesting question:

Endorheic lakes should become saline over time -- as the only possible outlets for such lakes are evaporation and occasionally groundwater, they are always evaporation basins and concentrate salts and other impurities from the river systems feeding them within themselves.

Prior to the Mediterranean Sea breaching the Bosporus, the Black Sea was likewise endorheic: it had no natural outflow. Yet the primordial sea was apparently a freshwater body, as the water remains down there, trapped under the saltwater cap.

So what gives? What's the explanation for why the Holocene Black Sea was a freshwater endorheic lake?

P.S. Thanks for u/frank_mania suggesting I post this question here!

submitted by /u/hammersklavier
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Why are transition element complexes coloured?

Posted: 24 Oct 2018 12:05 AM PDT

From what I understand, the electrons in a lower energy state absorb certain wavelength of light falling in the visible region, and the complementary wavelength is what we see as the colour of the complex. The electrons transition to a higher energy state after absorbing said wavelength. But when the electrons jump back to the original energy state, do they not emit the same wavelength they absorbed initially? Why do we then see only the complementary wavelength and not the whole spectrum?

submitted by /u/Vesuvion
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How does the Nitrate cycle work in freshwater ponds?

Posted: 23 Oct 2018 06:00 PM PDT

I am doing an internship soon and I still don't fully understand how it works.

I was not sure if this question would belong in Earth science or Chemistry.

I also know that plants and certain animals play a role in it too ,but I don't know why they do.

submitted by /u/Emy_Lee09
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Does working out help protect bone structure's?

Posted: 23 Oct 2018 10:23 AM PDT

I have always wondered if for example working out and training your back muscle's, help to protect your spine against damage by for example lifting heavy object's with bad posture.

​

if so is this universal for all bone structures (knee's and neck come to mind) or just the spine?

submitted by /u/Ahqoviing
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[Biochemistry] How do small nonpolar molecules just 'dissolve' through the phospholipid bilayer like that?

Posted: 23 Oct 2018 09:04 PM PDT

So, phospholipid bilayers have a hydrophobic "tail" and a hydrophillic "head" which conveniently creates the phospholipid bilayer. That part and the fluidity associated with this makes perfect sense.

​

However, am I wrong to assume that the cytoplasm and the extracellular 'fluid' of a cell composes of mostly water? Because this raises a few questions.

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First, I understand that nonpolar molecules can 'dissolve' inbetween the tails of the phospholipid bilayers. That makes sense. However, nonpolar molecules are not water-soluable because water is a polar molecule. How is it, then, that they can merely 'diffuse' through the heads and into the water-containing cytoplasm? How do they even float around in the extracellular 'fluid' in the first place? Wouldn't small nonpolar molecules, like Carbon Dioxide, be repelled from the cytoplasm and would 'stay' dissolved between the hydrophobic interior of the phospholipid bilayer? Wouldn't they be repelled from entering the extracellular fluid in the first place?

submitted by /u/sbundlab
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Are personality traits genetic?

Posted: 23 Oct 2018 08:22 PM PDT

This might be a really stupid question but do we get at least some parts of our character/personality from our parents?

submitted by /u/Aurora_Rose77
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How can we determine the age of the universe if time is relative?

Posted: 23 Oct 2018 03:52 PM PDT

This has been bugging me. If time is relative to the observer, how can we know how old the universe is? Or any sort of celestial body for that matter? Is our gravity/velocity low enough that we experience time close to its "true" speed? Is there any place in the known universe that we experience time significantly slower than?

submitted by /u/JamesRRustled
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How do the electrodes of an EEG pick up electrical signals?

Posted: 23 Oct 2018 10:52 AM PDT

I get that it reads and amplifies electrical signals from the brain, and sorry if this question applies more to physics, but how do the electrodes pick up the signals in first place? Does the thick layer of bone between the electrodes and the brain not interfere with the signals?

submitted by /u/Protein-Shake
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What is the spectral resolution of a typical rainbow?

Posted: 23 Oct 2018 02:14 PM PDT

A spectrum's resolution is given by the quantity R = λ / Δλ, where λ is the wavelength (i.e., color) of light, and Δλ is the smallest difference in wavelengths that can be distinguished at λ. It's essentially a measure of how much light is spread into its component colors by something like a prism, or diffraction grating. As an astronomy grad student, I work with an astronomical spectrograph with R = ~150,000.

I'm curious: what is the spectral resolution of a typical natural rainbow?

submitted by /u/crazunggoy47
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Diseases can have different effects based on hormones. How would such diseases affect transgender people undergoing hormone replacement therapy?

Posted: 23 Oct 2018 12:16 PM PDT

As an extra question, if someone starts transitioning at a younger age, how would that effect which diseases they get compared to transitioning at an older age?

submitted by /u/zieleix
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Why pictures of Earth are perfect spheres?

Posted: 23 Oct 2018 08:22 AM PDT

Why do we insist on drawing and picturing the Earth as a perfect sphere but in reality it's an elliptical sphere?

submitted by /u/andeffect
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vào lúc No comments:

Tuesday, October 23, 2018

If fuel is not replaced in a nuclear reactor, what happens to the power output over time?

If fuel is not replaced in a nuclear reactor, what happens to the power output over time?

If fuel is not replaced in a nuclear reactor, what happens to the power output over time?

Posted: 23 Oct 2018 03:09 AM PDT

Assuming the cooling pumps continue running and the fuel rods are all just allowed to reach a point of being "spent", what happens if they aren't replaced? My understanding is that spent fuel is more radioactive, but does it produce a different amount of power than newer fuel rods? I'd imagine that spent means the power output is slowly tapering off but when I read that the fuel is more radioactive, that also seems to suggest that it may put out more power.

submitted by /u/willscuba4food
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Men and Women have different warning signs for a heart attack, why is that?

Posted: 23 Oct 2018 07:07 AM PDT

This image provided by u/vivaenmiriana in a thread about life saving facts points out different warning signs. What things might cause this difference in warning signs?

submitted by /u/meanblazinlolz
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Why is the set of real numbers between 0 and 1 uncountable, but not the set of all integers?

Posted: 22 Oct 2018 08:54 PM PDT

The answer that I have found elsewhere is that the integers can be listed as such

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13...

and that the same cannot be done for the real numbers between 0 and 1. I don't see why this is true because I can list them as follows.

0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 0.01, 0.11, 0.21, 0.31...

Notice that there I have constructed the second list by taking the mirror image of the first list about the decimal point, so there is definitely a 1 to 1 mapping of integers to real numbers between 0 and 1.

The other reason usually given is that if you take a set which is assumed to contain all the real numbers between 0 and 1 then you can create a new number by making the first digit different than the first digit of the first number, the second digit different than the second digit of the second number and so on.

But you can also do this with the integers! Just create a new integer and make different than the first number in the ones place, different than the second number in the 10's place and so on.

Please help me see where I am wrong above.

submitted by /u/Hepheastus
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How have the researchers in this alcohol and dementia study accounted for sociodemographic and health related characteristics?

Posted: 23 Oct 2018 07:45 AM PDT

https://www.bmj.com/content/362/bmj.k2927

"We accounted for several sociodemographic and health related characteristics in the analysis, but residual confounding cannot be excluded as an explanation for the higher risk of dementia among abstainers. Indeed, this group is particular in that it is composed mainly of women from the lower socioeconomic group with higher prevalence of cardiometabolic risk factors and disease at baseline, a pattern that has also been observed in other studies"

Figure 2's caption mentions Cox regression analysis

I suppose I am asking for a simplified explanation. I only have a high school education in maths and statistics. I want to understand whether the higher incidence of dementia in abstainers than light drinkers is due to alcohol in low amounts having some sort of protective effect against dementia or if it's not actually the case and just appears this way due to other factors.

I've seen the rule against homework questions and I can tell you this is definitely not homework. It is a rather uneducated person trying to get his head around science for the sake of his long term health. I know there will be more important factors in protecting myself from dementia than the likely small dementia difference between abstinence and light drinking but surely all protecting factors are important. Dementia is bad.

submitted by /u/grate1438
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How do electric potentials work around the heart in EKG??

Posted: 23 Oct 2018 06:58 AM PDT

Hi everyone. Medical student here who recently started studying EKG. If anyone could help me figure out why is it that every depolarization or repolarization wave ends up as an isoelectric line at the end??

Let me take the P wave as an example. As far as I understood from high school physics once atrial depolarization is finished the entire atria is depolarized while the the entire ventricle is in a polarized state which in turn would lead to a potential difference between the 2 areas of the heart which in turn would lead me to believe that the electrodes would pick up this difference(Let's use lead 2 for example). Yet the ECG shows a 0 difference voltage and thus an isoelectric line. I've been scratching my head for daaays trying to figure this out. Help me.... PLEASE.

submitted by /u/ayazasker
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If everything in outer space is moving away from everything else and constantly expanding, how can 2 galaxies collide?

Posted: 22 Oct 2018 02:18 PM PDT

How/when did we learn that there was no oxygen in space?

Posted: 22 Oct 2018 10:46 AM PDT

Why has nobody come close to Tesla's inventions that were created up to 100 years ago?

Posted: 22 Oct 2018 03:49 PM PDT

Wireless energy in the late 1800s, an oscillator that could cause earthquakes, which was no more than a few feet long and wide. His free energy, his flying saucer designs. Still owning the record for largest man made lightening bolt etc.? Was he that smart?

submitted by /u/Bulbasaur_King
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Why is a pendulums period constant.. until it isn't?

Posted: 22 Oct 2018 07:32 PM PDT

One of the labs I did years ago in highschool involved the measuring of a pendulums period. We all know that a pendulum has a period which is constant regardless of its amplitude. You hold a weight on a string off its axis and it will swing from period to period, and take exactly the same amount of time to move end to end, regardless of the energy put into the system, until you hold the weight a little bit too high, and it swings a little bit too far, and no longer keeps accurate time from end to end. What is happening that causes this phenomenon? I asked my physics teacher decades ago, but he said it was a bit too complicated to answer in class at that point, and I never got back to the question. This has been bothering me for years now, and if anyone can explain it, and explain the math behind the concept, I would be so grateful. Thank you!

submitted by /u/spoonguy123
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How does a quantum particle decohere into the environment if the environment is quantum too?

Posted: 22 Oct 2018 09:32 PM PDT

My philosophy professor said we are not affected by quantum uncertainty at "our level" 30 orders of magnitude above the planck length and therefore the observer dependent states don't have bearing on free will. This is due to decoherence. I'm struggling to understand how this is the case.

submitted by /u/Africanus1990
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Why does decay happen as a first order reaction?

Posted: 22 Oct 2018 04:17 PM PDT

I understand how to calculate half life. I am just wondering why the rate of the reaction changes over time?

submitted by /u/jimmyth3xplod3r
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How "strong" of a vacuum can you make by pulling a piston out of a cylinder?

Posted: 22 Oct 2018 11:48 PM PDT

Asking for my dad - he sent the following explanation of his question, and I couldn't really answer: "Suppose you have a piston at the bottom of a cylinder, which has no opening at the bottom. When you draw the piston out, a vacuum is created.

It is easy to imagine that very quickly the pressure difference will become about 14.7 psi (atmospheric pressure) outside, and getting close to zero inside.

The question is, what happens next, if you continue to pull the piston? It is relatively easy to overcome 14.7 psi.

Is it impossible to pull it any further? Will there be another force holding the piston back? If so, what force?

Maybe, you can continue to pull the piston out—after a certain point the pressure differential becomes about 14.7 psi and that's all you have to overcome for the rest of the stroke. What I'm saying is the pressure difference can't be more than 14.7 psi, and yet you can continue to increase the volume inside the cylinder.

Or maybe the reduction of pressure close to a vacuum inside the cylinder becomes non linear compared to the increase in volume (contrary to Boyle's Law).

Apparently, a perfect vacuum is impossible. But the references I've found so far are not consistent on the meaning of "perfect vacuum." It could mean zero pressure, or it could mean no molecules of air, which might not be the same thing. I think "impossible" probably means it's difficult to extract every last molecule of gas from a chamber—the fewer they become, the harder it is to capture them."

submitted by /u/lasiusneglectus
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How to Compare Experimental data with Theory?

Posted: 22 Oct 2018 12:58 PM PDT

I've got experimental data from a that shows the intensity of light against position for a diffraction pattern and a theoretical curve by imputing parameters into a function. I want to compare how good a fit the theoretical curve is to the experimental data. My demonstrator suggested a chi-square test but when I researched this it seemed to be for observed and expected frequency of results. Any help would be much appreciated.

submitted by /u/LegalBiscotti
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Solar panel reaction time from light to dark?

Posted: 22 Oct 2018 06:42 AM PDT

Does a solar panel's voltage output drop to zero instantly if going from light to complete dark? Here's an example: In a completely dark room there is a 12 inch by 12 inch solar panel and a spotlight that puts out a 12 inch diameter beam of light. The spotlight is aimed directly on the solar panel and then switched on. The solar panel reaches its maximum output for the spotlight. The spotlight is then switched off. Does the solar panel's voltage output instantly drop to zero or does the reaction in the solar panel continue for some time?

submitted by /u/u3n3ts
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Why can cutting off the Brain's Oxygen supply sometimes cause euphoria?

Posted: 22 Oct 2018 09:14 AM PDT

What is the maunderminimum?

Posted: 22 Oct 2018 04:44 PM PDT

My co worker keeps talking about it and I'm curious. What is it?

submitted by /u/Daddydabs
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How do power outlet ethernet adapters work?

Posted: 22 Oct 2018 06:48 AM PDT

I have looked all over the internet and am unable to find out how they actually work. You simple plug them into a power outlet, and assuming the outlet is on the same power circuit as your router, it can function as an ethernet port.

submitted by /u/Just4TehLulz
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Why do fish come to the water surface to breathe when there is heavy fog?

Posted: 22 Oct 2018 09:13 AM PDT

I have a 1 acre pond with 19,000 fish of an average weight of 300 grams. In the last few days there has been heavy fog between 6:30 am to 8 am(approximately 27 °C). I have noticed that a large number of fish have come to the surface to breathe and go back into the water once the fog clears.

I have included a link to a video below:

https://photos.app.goo.gl/yCN1MLki2qFzDps36

submitted by /u/jonathanrjpereira
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Why does a water droplet hitting a extremely hot surface only produce a hissing sound at the start?

Posted: 22 Oct 2018 07:01 AM PDT

At slightly lower temperatures, water boils off and continuously makes a sizzling sound for the duration its boiling. However this does not seem to be the case when the temperature of a surface is much higher than the boiling point of a liquid.

submitted by /u/tet2323
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How is dried permethrin on surfaces safe for cats when wet permethrin is dangerous?

Posted: 22 Oct 2018 07:09 AM PDT
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