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Saturday, February 24, 2018

What does unplugging your electronics when not in use do for the environment/electricity bill?

What does unplugging your electronics when not in use do for the environment/electricity bill?


What does unplugging your electronics when not in use do for the environment/electricity bill?

Posted: 24 Feb 2018 05:12 AM PST

Does smoking THC extract or plant-based marijuana have long-term effects on memory?

Posted: 23 Feb 2018 05:54 PM PST

Just curious.

submitted by /u/trojankid1123
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Does it require energy to rotate a particles axis of spin?

Posted: 24 Feb 2018 06:04 AM PST

I posted a question here a few days ago, but I didn't get my point across very well, so I'm asking a more basic question.

Whether or not a particle is measured to have spin up or down, the axis by which it "rotates" (I know it isn't actually rotating) is the same. I would assume to rotate that axis would require energy and that energy would depend on how far it has been rotated.

For example, say you have two stern-gerlack machines one after the other. The first one has the magnetic field perpendicular to the ground, the second is on a 60 degree angle to the ground. An electron is sent through the apparatus, and has it's spin measured by both setups.

Did it require energy to to change the angle that its spin was about from 90 degrees to 60 degrees? If so, was that amount of energy dependant on how many degrees it had been rotated?

Thanks!!!

submitted by /u/Tablecork
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Does knowledge have mass? If so, how much does it weigh?

Posted: 23 Feb 2018 04:31 PM PST

This may be a stupid question, but as I was running today, I was thinking that as we gain knowledge, we gain more information in our brain, so in a way does that knowledge have mass and does it have weight as you sort of "keep" it in your brain? Thanks! Just curious and I couldn't find similar questions that were already on this sub.

submitted by /u/abeast8900
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What exactly determines mucus's color?

Posted: 24 Feb 2018 07:21 AM PST

We can see galaxies and some other objects that are millions or even billions of light years away, some of them might not exist anymore. How can we know or estimate if a star or a galaxy still exists?

Posted: 23 Feb 2018 02:09 PM PST

and second question, if it is true that we can see many objects that no longer exist, how much of the observable universe no longer exist?

submitted by /u/One_Cold_Turkey
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Are people taking immunosuppressant drugs, for example transplant recipients, less susceptible to autoimmune diseases?

Posted: 23 Feb 2018 02:25 PM PST

When throwing stuff, does our brain actually try to calculate how hard it has to throw for the item to land at the desired point? Or does it just estimate based on experience?

Posted: 23 Feb 2018 12:37 PM PST

I am just wondering wether the brain is secretly awesome at physics or just good at weight / strength estimation.

submitted by /u/styler2go
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How does radiation poisoning work?

Posted: 23 Feb 2018 03:59 PM PST

What makes you sick or die?

submitted by /u/Caterpill420
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Could we make an artificial cell?

Posted: 23 Feb 2018 02:03 PM PST

Made from the ground up, could it be possible?

submitted by /u/kryger442
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How does thermal imaging work?

Posted: 23 Feb 2018 01:46 PM PST

A more in-depth explanation would be appreciated.

submitted by /u/DarthCookiez
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What makes a given smell/taste "bad" or "good". Why do we interpret them one way or the other?

Posted: 23 Feb 2018 01:27 PM PST

Even beyond personal tastes, why can we all agree, flowers smell good trash smells bad?

submitted by /u/dustoff87
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How is the height of the mountain measured?

Posted: 23 Feb 2018 02:50 PM PST

Does the temperature have any (noticable) effect on air resistance?

Posted: 23 Feb 2018 01:35 PM PST

While riding my bike in cold weather, I seem to notice a bit more drag compared to biking in warmer weather. Does the increased density have noticable effect?

submitted by /u/BigBoetje
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What happens to the jaw after permanent teeth grow in?

Posted: 23 Feb 2018 01:03 PM PST

Our permanent adult teeth grow in behind our baby teeth and push them out. What happens to the space in our jaws that used to be occupied by the adult teeth?

submitted by /u/someone5793
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What are the neurological or psychological differences between the auditory hallucinations of voices, e.g., as in schizophrenia, and a persistent negative internal monologue in one's own inner voice?

Posted: 23 Feb 2018 11:27 AM PST

I've read that when Betelgeuse explodes, it will create high levels of light at night for several days, but would a supernova on the "day side" of Earth even be visible at all?

Posted: 23 Feb 2018 10:12 AM PST

[Astronomy]

submitted by /u/upstartweiner
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Does listening to music or videos through headphones/earphones affect actual hearing after extended periods of use?

Posted: 23 Feb 2018 10:10 AM PST

What makes the felid species "Neofelis" so distinct from others and a member of Pantherinae?

Posted: 23 Feb 2018 02:27 PM PST

Hey!

I stumbled upon this subspecies by looking through Wikipedia for fun and was somehow surprised to find this category which only has two different types in it. The Wikipedia referals were not exactly helping me understand, so I wondered if you have some more concrete or easier to congest information.

What I have stumbled upon is that they are good climbers and rather small, so I'm even more perplexed on what makes them part of the Pantherinae tree.

Hope to gain some interesting insights!

Cheers

submitted by /u/Silvere01
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How does mold grow inside ice machines?

Posted: 23 Feb 2018 06:11 PM PST

How does mold subsist inside a cold ice machine, without any light or apparent source of nourishment/ chemical energy?
I tried looking this up online, but the results are all about how to clean / avoid contamination, without explaining the science behind it.

submitted by /u/hypoid77
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Friday, February 23, 2018

What elements are at genuine risk of running out and what are the implications of them running out?

What elements are at genuine risk of running out and what are the implications of them running out?


What elements are at genuine risk of running out and what are the implications of them running out?

Posted: 23 Feb 2018 04:33 AM PST

Can you break sound barrier under water or any other material?

Posted: 23 Feb 2018 02:10 AM PST

What’s the largest star system in number of planets?

Posted: 22 Feb 2018 10:06 AM PST

Have we observed any system populated by large amount of planets and can we have an idea of these planets size and composition?

submitted by /u/sometimeonabench
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Why does plastic turn white at the creases when folded/bent?

Posted: 23 Feb 2018 06:32 AM PST

Do microwaves leave residual changes to molecules after heating?

Posted: 23 Feb 2018 02:50 AM PST

Have a coworker who claims microwaves have a residual impact on the molecules in food and this is what causes microwaved food to taste worse than oven-baked food.

I've been puzzled by this since from what I know microwaves just excite water molecules and cause them to heat their surroundings. Yet he claims this changes the molecules in minorly-unhealthy ways.

He also claims the effect of microwaves on food aren't understood, something which I am incredibly sceptic of in this day and age with all the nutrition agencies around the world.

So my question is: do microwaves have any residual effect on food beyond the heat from excited water?

submitted by /u/jacobstx
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Why does snow melt in the sunlight, even when the temperature outside is below freezing?

Posted: 23 Feb 2018 01:13 AM PST

My first thought is that the sun is just a big ball of heat, but if the air temp is below freezing, how can the heat melt the snow?

submitted by /u/Gallcws
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What would a spaceship moving at 0.9c firing lasers both in front of it and behind it look like to an external reference frame?

Posted: 22 Feb 2018 08:15 PM PST

I'm having some difficulties wrapping my head around how fast the ship would appear relative to the two lasers. In order for both to be moving away from the spaceship at c, the spaceship would also have to appear to be not moving. Where am I wrong/what am I missing?

submitted by /u/Malsirhc
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How does the cosmic microwave background persist? Why hasn't it been distorted and destroyed by new sources of energy pumping into space?

Posted: 22 Feb 2018 03:59 PM PST

Does adiabatic warming occur when air descends in the Earth's polar cells?

Posted: 22 Feb 2018 11:44 PM PST

If adiabatic warming occurs when air in a Hadley cell descends, would it not also occur when air descends in a polar cell? If not, why?

submitted by /u/wokkaB
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How does a memristor work?

Posted: 23 Feb 2018 04:42 AM PST

How does RFID blocking material work?

Posted: 23 Feb 2018 07:33 AM PST

Is there an altitude at which there is no longer a speed of sound?

Posted: 23 Feb 2018 07:14 AM PST

Mar's summer temperature can be 20 celsius. Could a human survive with just an oxygen mask?

Posted: 22 Feb 2018 11:07 PM PST

I read today that summer temperatures on Mars can reach 20 degrees celsius. Could a human survive outside on Mars without a spacesuit, but with just an oxygen mask during summer days? Could a human being walk outside in shorts, a t-shirt and an oxygen mask during summer afternoons?

submitted by /u/thermal7
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Does the Meissner effect relate to Lenzs law?

Posted: 23 Feb 2018 06:15 AM PST

If I drop a powerful magnet down a copper tube, the magnet induced a current in the tube which produces an opposing magnetic force to slow the magnet - this is Lenzs law.

If you could make the resistance zero - would this make the magnet fall infinitely slow - to just levitate in the pipe?

A superconducting magnet does just that - gets a magnet to levitate - according to the Meissner effect. Are the two related?

submitted by /u/max_p0wer
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How does cancer metastasis work?

Posted: 22 Feb 2018 10:54 PM PST

Cancerous cells form somewhere in the body, but how does it get into the lymph system? Does it literally just get transported via the lymph paths to new areas? Through the bloodstream? And when it transports, does it just attach to other stuff and keep growing? Why does it not die when separated from the parent tumor?

submitted by /u/PM_ME_BEAR_GIFS
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Can you use a normal (CMOS) camera for detecting scintillation?

Posted: 22 Feb 2018 05:44 PM PST

I was reading up on how to make a radiation detector using a scintillator, and all of them say that a Photomultiplier (PMT) must be used to detect the scintillation. Can you just use a normal camera (phone camera) to detect this, assuming it was sealed off from all external light?

submitted by /u/dadur604
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Why hasn't The Asteroid Belt formed a planet?

Posted: 22 Feb 2018 07:27 PM PST

Our theory for the origin and organization of our solar system includes the idea that all the current matter in our solar system originated from one large nebula, which orbited the young sun, and over time, evolved from a cloud of dust to organized rings/clumps of matter of similar composition (hence why we have the terrestrial and gaseous planets), and finally to planets. Why then do we still have a ring of asteroids orbiting between the terrestrial and gaseous planets? Should they not have gravitated together to form a planetary body (or become part of another rocky planet) as well?

submitted by /u/BeeMill_
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Can a comet maintain an atmosphere?

Posted: 22 Feb 2018 10:08 PM PST

And if so, how would it differ from our own?

submitted by /u/CallmeDayMan
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Would two Venturi tubes in series double the effect?

Posted: 23 Feb 2018 03:00 AM PST

If a liquid is being pushed down a tube with two venturi tubes in series (however the second one in the series would have a smaller internal diameter) is the effect from Venturi tubes increased again when the liquid passes through the second tube?

submitted by /u/BANTZ97
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How do people know that the Island of Stability exists? And could there possibly be another "island" after it?

Posted: 22 Feb 2018 10:55 PM PST

Also, what is holding us back from reaching this? Not much online, so I'm not even sure these questions can be answered. Help fulfill my curiousity in anyway possible!

Thanks!

submitted by /u/jet0303
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What makes astronomers think life in general isn't possible on gas giants?

Posted: 23 Feb 2018 12:48 AM PST

I get that planets like Saturn or Jupiter are impossible to life as we know it, but why can't there be any life whatsoever? Humans also can't live on the inside of a nuclear reactor, yet there are microbes who do survive there. Could it be that there's life on gas giants, but we will never know because we can't go check it out ourselves?

submitted by /u/random_username456
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How far back can you go before carbon dating becomes unreliable?

Posted: 22 Feb 2018 02:06 PM PST

Yesterday I was speaking with a friend who is a Jehovah's Witness, so obviously he believes in the flood, and that humans have only been on the earth for 6,000. He says he knows a lot about carbon dating, and that it's only accurate if you're dating something that's within the last 3,500 years, after that, it can be very inaccurate. He also says that water will cause extreme variation in dating, do for example an object only 200 years old that's been in water for that time may be dated at 1,000 years old. So if you factor in a global flood, the dating of certain objects makes sense to say humans have only been on earth for 6,000 years. How much of this is true?

submitted by /u/poshjosh1999
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How does a computer process “simple” events?

Posted: 22 Feb 2018 08:19 PM PST

I'm a student working part-time as an IT guy, and I've always loved talking about and learning about computers. I took a couple years of classes learning how to program, and it really helped me understand how a computer thinks.

What I'm asking is: On a literal level (from my hand pushing in the mouse button), what is the process of a mouse click being registered? Does the mouse send a request to your motherboard? CPU? How does me clicking a button affect a couple of pixels on my screen? Also, what field of study does this question touch on? Electrical engineering? Computer systems engineering?

submitted by /u/PepeSanic88
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Thursday, February 22, 2018

What is the effect, positive or negative, of receiving multiple immunizations at the same time; such as when the military goes through "shot lines" to receive all deployment related vaccines?

What is the effect, positive or negative, of receiving multiple immunizations at the same time; such as when the military goes through "shot lines" to receive all deployment related vaccines?


What is the effect, positive or negative, of receiving multiple immunizations at the same time; such as when the military goes through "shot lines" to receive all deployment related vaccines?

Posted: 21 Feb 2018 06:07 PM PST

Specifically the efficacy of the immune response to each individual vaccine; if the response your body produces is more or less significant when compared to the same vaccines being given all together or spread out over a longer period of time. Edit: clarification

submitted by /u/Sampioni13
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AskScience AMA Series: I am Melinda Krahenbuhl and I am the director of the Reed Research Reactor, the only nuclear reactor operated primarily by undergraduate students. AMA!

Posted: 22 Feb 2018 04:00 AM PST

Hi everyone, I'm Melinda Krahenbuhl, and I'm the Director of the Reed Research Reactor in Portland, Oregon. I'm here to answer your questions with help from Atlas Obscura, who wrote about the reactor. I received my Ph.D. in Chemical Engineering from the University of Utah in 1998. I've previously served as the Director of the Dow Chemical Research Reactor (2008-2011) and the Reactor Adminstrator of the University of Utah Research Reactor (2004-2008). Under the Department of Energy's Industrial Assessment Center program, I completed 120 energy assessments for manufacturers in the intermountain region, ranging from manufacturers of ice cream to rocket motors. I participated from 1998 to 2008 in the Joint Coordinating Council for Radiation Effects Research-Project 2.4 analyzing exposures, bioassay data, and the biological fate of plutonium in the Russian weapons development workers. I have served on the National Organization of Test, Research and Training Reactors (TRTR) executive committee since 2008. In 2014, I became the first female chair of TRTR. I served as the chair for 2 Ph.D.'s and 6 Master students and employed over 100 undergraduates in her academic roles. I have 15 peer reviewed publications, and I've received federal funding for 17 projects with a financial value just over 2 million dollars. My research interests include biokinetic modeling, neutron activation and fission track analysis.

I'll be on from 1 p.m. to 3 p.m. (18 UT), AMA!

submitted by /u/AskScienceModerator
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Do wild animals get physical addictions to substances?

Posted: 21 Feb 2018 04:20 PM PST

What causes the increased grip on paper when you lick your finger?

Posted: 21 Feb 2018 08:33 PM PST

When trying to separate pages, I sometimes lick my fingers to make the pages "stick". What about dampening my skin makes it adhere so well to the paper?

submitted by /u/TheOutbreak
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How can brain cells cause tumours even though they can not multiply?

Posted: 22 Feb 2018 03:56 AM PST

Hi! I asked this in another place and didn't get an answer and got insulted, and I was told to post this question here.

So I'll just ask it here. Biology is not really a strong point for me, and Google doesn't help me much so I think it is good for me to have an answer where people know what they are talking about.

Thanks!

submitted by /u/Kypriss97
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Why does sleep deprivation and lack of sleep increase depression?

Posted: 22 Feb 2018 02:00 AM PST

I've personally never understood why the likeliness of depressing / sadder thoughts increase when we get considerably more tired. The only logical explanation I could think of is that where our body becomes fatigued, we want to rest and not giving into that instinct causes the aforementioned.

submitted by /u/Kree_Horse
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How does Positron Emission Topography (PET) work?

Posted: 21 Feb 2018 12:59 PM PST

Wouldn't the positrons undergo annihilation the very instant they come into contact with normal matter?

submitted by /u/CSGOWorstGame
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Is there any evidence that pornography is a public health risk?

Posted: 21 Feb 2018 10:44 PM PST

Florida declares pornography a public health risk. I'm aware that politics is often irrational. But is there any scientific evidence that shows in this direction? And if yes, can this risk be quantified?

submitted by /u/okko7
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Why are mercury salts a common first choice for heavy atom soaks in protein crystallography?

Posted: 22 Feb 2018 07:28 AM PST

I understand that you need an electron dense heavy atom in order to dominate a Patterson map. But why are mercury salts more common than other heavy atoms, like platinum, gold etc.?

submitted by /u/BabySasquatch
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Would someone who got into an accident that put them into a coma for a couple of weeks still be addicted to a drug that they were addicted to prior to the accident? Why or why not?

Posted: 21 Feb 2018 10:41 PM PST

How fast does a sun blow up? Not as in life span, but say a supernova, how long would it take for the process to complete?

Posted: 22 Feb 2018 03:05 AM PST

Can the effect of a "bunker buster" be accurately predicted, in relation to the target's compressive strength?

Posted: 22 Feb 2018 03:01 AM PST

This infograph picqued my interest; apparently there's a sharp (exponential?) decrease of the projectile's effectiveness with an increase in compressive strength.

Newton's approximation for impact depth won't work with such slow impacts, but can a reasonably accurate prediction be made when the target's compressive strength is known?

For instance, how would the GBU-28 and GBU-57 fare against targets such as Kosvinsky Mountain or Cheyenne Mountain?
Given the compressive strength of granite is much higher, between 100-250 MPa (~14,000 to 36,600 PSI), I'd assume they effect would be miniscule.

submitted by /u/VegetableCell
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Is there any evidence to suggest that biracial people are less susceptible to genetic diseases?

Posted: 22 Feb 2018 05:52 AM PST

Being that they are created from very different gene pools.

submitted by /u/HeyItsTman
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How does homolytic fission make radicals? Don't both of the atoms still have the same amount of electrons before the covalent bond and after the bond is split?

Posted: 22 Feb 2018 05:29 AM PST

I was in a chemistry lesson a week ago and asked this to my teacher who then responded to me saying it wouldn't be in the syllabus but im still really curious

submitted by /u/bilayo
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How can we hear when someone is smiling?

Posted: 21 Feb 2018 06:48 PM PST

I listen to a lot of podcasts, and I can always hear when someone is smiling, even though I've sometimes never seen this person nor sometimes even heard the person before. It seems to be an intuitive thing. So what is it about the changes in speech that indicate to our (subconscious?) brain that the other person is smiling?

I put this under Neuroscience because I'm sure it has something to do with how our brain processes language, but if there's a better flair to use, I can change it.

submitted by /u/garzai_mit
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What happens if a natural gas deposit in the ground ignites?

Posted: 21 Feb 2018 04:21 PM PST

How does the Hubble Telescope take pictures?

Posted: 21 Feb 2018 02:25 PM PST

I know in photography to take pictures you need to be standing still to not blur the image, you also need to (depending on your exposure and a bunch of other factors) also keep it still for that factor. So how does it take clear photos?

submitted by /u/boshdalek
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Do genetics influence the way one's voice sounds?

Posted: 22 Feb 2018 02:48 AM PST

[Physics] What makes us distinguish between hollow and solid objects so easily by just tapping the surface?

Posted: 21 Feb 2018 10:59 PM PST

I want to understand the physics of what makes both of those sounds sound so different. Is it because of different frequencies present in them? If so which frequencies are present in sounds created by solid objects and which ones are present in the sounds created by hollow objects.

submitted by /u/SpecialistProblem
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