Pages

Tuesday, May 14, 2019

If ocean water had a higher viscosity, would wave size be affected?

If ocean water had a higher viscosity, would wave size be affected?


If ocean water had a higher viscosity, would wave size be affected?

Posted: 13 May 2019 11:18 AM PDT

Could solar flares realistically disable all electronics on earth?

Posted: 14 May 2019 06:01 AM PDT

So I've read about solar flares and how they could be especially damaging to today's world, since everyday services depend on the technology we use and it has the potential to disrupt all kinds of electronics. How can a solar flare disrupt electronic appliances? Is it potentially dangerous to humans (eg. cancer)? And could one potentially wipe out all electronics on earth? And if so, what kind of damage would it cause (would all electronics need to be scrapped or would they be salvageable?) Thanks in advance

submitted by /u/ejoch
[link] [comments]

Why do bridges suffer from resonance at specific wind speeds if wind isn't a consistently periodic driving force?

Posted: 14 May 2019 04:54 AM PDT

I'm researching harmonic motion for a physics exam right now, and as I understand it, driving forces, amongst other things [equal/close to the natural frequency of a system, pi/2 rad out of phase with the oscillation of the system, etc] needs to be consistently periodic in order to cause resonance of a system. If the wind is just gushing one way at a certain speed, how does this induce resonance in a physical structure?

submitted by /u/Mega_Dunsparce
[link] [comments]

Are bees drawn by scent or sight?

Posted: 14 May 2019 07:39 AM PDT

I had no idea where to post this...

Now I'd like to give you some background to why I'm asking... basically I have a phobia of bees. a real true in every sense actual PHOBIA. Meaning when bees are around me I literally blank out from fear. My whole self goes into flight mode and I end up putting myself into a way more dangerous situation trying to escape. For example accidentally running into traffic to escape a bee. I have nightmares about once a month where I wake myself up screaming over a bee. One sad day I was a passenger in the front of a car that a bumblebee flew in. In my panicked frenzy of fear I KICKED OUT THE FUCKING WINDSHIELD. This is my real life.

As you can imagine due to my extreme fear of bees I have indirectly become leery of flowers. Now it's unfortunate because I think they're pretty and I like how they smell and I want to like them but I'm afraid to get too close. Also in the summer I tend to avoid perfume for fear of smelling too sweet or flowery.

Now that you have the background i am asking because I want to do a hairstyle with FAKE flowers in it. Will bees be indifferent to me? Will they see the flowers and want to land on them? Do they only smell flowers? Do you think I will be safe?

Thanks for reading this guys!!

submitted by /u/00bray00
[link] [comments]

How does iodine help with radiation? If at all.

Posted: 13 May 2019 10:29 PM PDT

Just watched a show about chernobyl

submitted by /u/worldsokayestcook93
[link] [comments]

How are Scoville heat units calculated?

Posted: 13 May 2019 05:12 PM PDT

I have been told that the Scoville scale is based on the concentration of capsaicin in the pepper itself. But concentration is in molarity, so how would you get from the concentration to Scoville heat units?

submitted by /u/c_gen
[link] [comments]

What Scientific Discoveries Proved Lord Kelvin Wrong About The Future Of Physics?

Posted: 13 May 2019 12:08 PM PDT

In the 1900s Lord Kelvin said "There is nothing new to be discovered in physics now. All that remains is more and more precise measurement." I'm assuming this quote is backed up with the fact there weren't many discoveries being made and it felt like physics had been fully sussed out (I'm assuming he didn't just say this for no reason).

Of course he was wrong as we have lots of unanswered questions and theories in cosmology and quantum mechanics now. But what were the precursors to this new age of physics? There was of course the Bhor-Einstein debates but what was the first observation or theory that hinted that there is a lot more that is yet to be discovered and understood?

submitted by /u/Retsek860
[link] [comments]

What is causing the background static/white noise being heard in VHF signals?

Posted: 14 May 2019 07:47 AM PDT

I've been listening to this stream of LiveMeteors.com. Everyonce in a while a distinct audio is heard, but for the most part it's just white noise. Where is this white noise coming from exactly?

submitted by /u/KilgoreThunfisch
[link] [comments]

when a cell of a body dies.... What does happen with the cell?

Posted: 14 May 2019 03:14 AM PDT

what is happening after the dead of a cell, through apoptosis or necrosis, with the cell? Does it got just broken down and absorbed by the surrounding cells? Can someone explain this and some mechanisms behind this? (please dont mind my english skills, not native speaker)

submitted by /u/OmnisExNihil
[link] [comments]

How do we tell the difference between small and far away?

Posted: 14 May 2019 06:54 AM PDT

I don't know how simple this answer is. It may be a really silly question. But I have seen a YouTube video that shows how giant some stars are. Although they all look comparable in size from earth.

So my question is what method do they use to to tell if it's really big or just really far away over such a vast distance?

submitted by /u/kingkornish
[link] [comments]

Is it possible that the Voyager 1 spacecraft will be destroyed as it traverses through the Oort Cloud?

Posted: 14 May 2019 02:59 AM PDT

Why does UV light cause damage to the retina?

Posted: 14 May 2019 06:17 AM PDT

What makes UV light sources such as the sun dangerous? What chemical process takes place when UV light enters the eye to cause damage?

submitted by /u/JakeHassle
[link] [comments]

How high a signal frequency can we create?

Posted: 14 May 2019 06:13 AM PDT

I want to know is it possible to make a zero point frequency and if not how high can one be made? how close can we get?

submitted by /u/dontknowhowtoprogram
[link] [comments]

Briefly, how do Loop Diuretics deal with Hypertension?

Posted: 14 May 2019 02:24 AM PDT

Im extremely sorry if this is the wrong place to ask such a question, but I'm doing a project based on loop diuretics and for a brief introduction I wanna word it as simply as possible how Loop Diuretics deal with Arterial Hypertension. Thanks

submitted by /u/zeangelico
[link] [comments]

I just read about an 'Angel of Death' in Germany, are there programs tracking hospital deaths and the shifts of doctors and nurses, that could single out anomalies and point to possible murderers in the hospital wards?

Posted: 14 May 2019 06:08 AM PDT

One way these people are caught is when the hospitals notice that many more patients need to be resuscitated after a particular nurse's shift. It seems to me a program should be flagging these anomalies asap. Not sure how to flair this.

article from may 10 NYT.

submitted by /u/roraima_is_very_tall
[link] [comments]

How do astronauts safely clean the ISS? (crumbs, hair, dust, sneezes, grease, etc) Can these things become dangerous?

Posted: 14 May 2019 05:47 AM PDT

Is there a limit to how much CO2 the oceans can absorb? If so, will the rate of absorption eventually slow causing the rate of rising atmospheric concentrations to increase?

Posted: 13 May 2019 10:27 AM PDT

Why did they just redefine the kilogram?

Posted: 14 May 2019 05:28 AM PDT

Since they were revising SI anyway, why not take the opportunity to make the gram the official base unit?

submitted by /u/teh_maxh
[link] [comments]

Why is ritalin used as a placebo in psilocybin trials?

Posted: 14 May 2019 05:06 AM PDT

Not sure if this falls under psychology or neuroscience, but how is ritalin considered a placebo for psilocybin? I was reading How to change your mind by Michael Pollan when I came across this little tidbit of information.

submitted by /u/vcxzrewqfdsa
[link] [comments]

Can blockages of the coronary artery be reversed without surgery?

Posted: 14 May 2019 04:56 AM PDT

When coronary arteries become partially blocked, in the sense that there's still blood flow but there is build up in the artery, can diet and exercise help clear them? Or does diet and exercise simply prevent further blockage?

submitted by /u/bulldog-and-shihtzu
[link] [comments]

How do we measure the frequency of light?

Posted: 14 May 2019 04:51 AM PDT

Especially since the resolution might be to several decimal places and that unpolarised light might have the frequency change moment to moment.

With regards to measuring the frequency of distant galaxies - to measure Redshift - how do we measure the frequency of one galaxy and not all the stuff in between and near it. For example, if there were a trillion small dust clouds in the trillions and trillions of meters (in the straight line) between us and the galaxy, the reflection, absorption and reemission of light by the dust, asteroids etc could affect the frequency.

And galaxies extremely far away will blend into one since a second of arc from our measuring equipment will include quite a lot of celestial bodies (1/1296000 of all of them)

And large distances in space, as I understand it, are curved due to the gravitational effects of bodies we have no idea about it (as there are an infinite number of objects with mass in very deep space)

Lots of questions about this.

submitted by /u/solololosolo
[link] [comments]

For subsonic air flowing through a convergent duct, it decreases pressure and increases velocity. The opposite happens when flowing through a divergent duct. Why are these principles reversed for supersonic air?

Posted: 13 May 2019 09:28 PM PDT

Do solutes add significant volume to water, or do the ions work more like interstitials that just fill empty space?

Posted: 13 May 2019 02:10 PM PDT

Monday, May 13, 2019

How much radioactive contamination did the 2011 Fukashima nuclear incident generate, and how much of it is actually getting cleaned up?

How much radioactive contamination did the 2011 Fukashima nuclear incident generate, and how much of it is actually getting cleaned up?


How much radioactive contamination did the 2011 Fukashima nuclear incident generate, and how much of it is actually getting cleaned up?

Posted: 12 May 2019 02:27 PM PDT

I haven't been able to find (as a non-Japanese speaker) any information on how much stuff was irradiated & cleaned up. I was specifically looking for info on topsoil. How much dirt was contaminated? How much topsoil has been, or is planned to be, removed & hauled elsewhere? How deep does does contamination show? Stuff like that. In my perfect world, I'd see a 3-D image of below ground contaminantion levels, and how much of that contamination would be cleaned up.

Re flair: I guessed it would be engineering, but wasn't entirely sure what category was the best fit.

submitted by /u/popedotninja
[link] [comments]

If you remove a part of your internal body or organ, like a large tumor or kidney, what fills that gap they left?

Posted: 12 May 2019 09:54 AM PDT

Semirelated side question- if the air that entered the body cavity during surgery or in that open gap, does anything happen to it or do you just have a bubble of air in you now?

submitted by /u/ursamini
[link] [comments]

what ended the Paleocene–Eocene Thermal Maximum?

Posted: 12 May 2019 03:45 PM PDT

Why did superglue start to emit smoke,and get really hot, when a drop fall on my jeans?Is that toxic?

Posted: 12 May 2019 09:54 AM PDT

Do other mammals get sunburnt?

Posted: 12 May 2019 09:06 AM PDT

How do they get particles to strike each other in particles accelerators?

Posted: 12 May 2019 06:24 PM PDT

Given the dimensions of particle accelerators, and the minute nature of elementary particles, how can particles be made/aligned to hit each other? Given the velocity of the particles, this seems impossible.

submitted by /u/Nasquid
[link] [comments]

Why does Saturn have hexagonal poles?

Posted: 12 May 2019 02:37 PM PDT

How do we get vitamin(s) from the Sun?

Posted: 12 May 2019 09:37 AM PDT

Why do we use mice instead of pigs for most testing?

Posted: 12 May 2019 10:55 AM PDT

Since pigs are so close to humans

submitted by /u/Guinean
[link] [comments]

How do power amplifiers turn a small voltage into a larger voltage?

Posted: 12 May 2019 10:29 AM PDT

I was wondering how they take electricity and turn it into a larger output. Do they store power and release it once it reaches the intended output? Or is there something inside that builds it up?

submitted by /u/Arkose07
[link] [comments]

How do vaccines work?

Posted: 12 May 2019 11:09 AM PDT

How do the vaccines know what to target, without causing side effects and/or killing the patient?

submitted by /u/pigaroos
[link] [comments]

Do things decay in space?

Posted: 12 May 2019 06:18 AM PDT

Was chatting with a friend, we were wondering if things decay in space? He said they wouldn't but I wasn't sure.

Cheers.

submitted by /u/chuggythesteamtrain
[link] [comments]

If proteins are degraded in our digestive system, how come Mad Cow disease is transmitted by eating infected flesh?

Posted: 12 May 2019 12:21 AM PDT

I mean, I can understand how the prions are stable in heat, but the degradation of proteins is just hydrolysis of the peptide bond, why wouldn't that happen?

submitted by /u/Fretful_Hobbit
[link] [comments]

Sunday, May 12, 2019

What happens to microbes' corpses after they die?

What happens to microbes' corpses after they die?


What happens to microbes' corpses after they die?

Posted: 12 May 2019 04:03 AM PDT

In the macroscopic world, things decay as they're eaten by microbes.

How does this process work in the microscopic world? Say I use hand sanitiser and kill millions of germs on my hands. What happens to their corpses? Are there smaller microbes that eat those dead bodies? And if so, what happens when those microbes die? At what level do things stop decaying? And at that point, are raw materials such as proteins left lying around, or do they get re-distributed through other means?

submitted by /u/floppy_eardrum
[link] [comments]

If including risk-taking and substance abuse, how do the genders compare in deliberate self-harm?

Posted: 12 May 2019 07:05 AM PDT

Studies find that male suicide rates are far higher than women's, across regions and countries. However, it seems that delibarate self-harm (DSH) is more prevalent in women throughout Europe, with Finland as a possible exception. But what is the case if one includes deliberate risk-taking activity—such as choosing the most dangerous jobs, performing dangerous stunts in front of friends, or consciously picking fights—or using substances (alcohol, drugs) in order to punish oneself? These kinds of activities are generally associated with men, so it would seem that perhaps DSH numbers might look different if such problematic actions are taken account of as well.

Sources:

  • Connell, Raewyn: Masculinities, second edition, Polity Press, Cambridge 2005.
  • Hawton, Keith: 'Sex and suicide: Gender differences in suicidal behaviour' https://doi.org/10.1192/bjp.177.6.484 Published online: 02 January 2018
submitted by /u/Canned-Man
[link] [comments]

What causes some coastal cliffs to have thin beaches at their bases, while others have deep or rocky water immediately?

Posted: 11 May 2019 05:35 PM PDT

How were the most recently discovered Elements (ie. 113, 117, 119 ect.) documented, when their half lives are so short?

Posted: 12 May 2019 12:44 AM PDT

Democracy will inevitably help majorities at the expense of minorities because majorities will vote with self interest. Is there a known governmental system where decisions are made with more equality?

Posted: 12 May 2019 06:10 AM PDT

Calculating the trigonometric functions, logarithms and square roots by hand. How?

Posted: 12 May 2019 02:19 AM PDT

Is there a method of calculating sine, cosine and other trigonometric functions by hand? Here I am not talking about the angles we know the trig functions of by heart, but of an arbitrary angle (68.4 degrees for example). Logarithms and square roots as well. Moreover, how did people do it before the times of computers and calculators? I have found that Taylor series can be used, but the first term still involves calculating the value of the function. If not Taylor series, then how?

submitted by /u/Nikyvas911
[link] [comments]

What would happen if you were hit by a beam from a particle accelerator?

Posted: 11 May 2019 04:02 PM PDT

Why do some exhaust fumes from airplanes stay in the sky for hours (the white long lines), while other disintegrate and disappear immediately?

Posted: 12 May 2019 03:31 AM PDT

Why is the membrane of a cell called the "plasma membrane" when it's made out of lipids?

Posted: 11 May 2019 02:50 PM PDT

According to my understanding, plasma is another state of matter (the fourth secret one you don't learn until around high school), and is a large part of your blood. So, in the context of the lipid bi-layer for all animal cells, wouldn't it make more sense to call it the lipid membrane? Thanks for your answers

submitted by /u/Lethargic_Leopard
[link] [comments]

How does a diet of an ancient people compare to an average modern diet?

Posted: 11 May 2019 07:01 PM PDT

Do our eyes adjust to motion like they do to light?

Posted: 11 May 2019 01:54 PM PDT

For example, when I'm playing a game at 30 fps, it will initially feel slow and laggy, but after a bit, it looks like it's moving smoothly, even though the framerate hasn't changed. After I stop playing, real life will appear to be moving faster and smoother, but after it bit, it becomes normal again.

So I'd like to know: do our eyes (or maybe the vision center of our brains) "slow down" or "speed up" with the speed of what we're observing, like how they let more or less light in depending on the amount of light we're looking at?

submitted by /u/facekapow
[link] [comments]

Is there anyway to heal a smoker's lung? Or has the damage been done already and requires a transplant?

Posted: 11 May 2019 03:07 PM PDT

How are they considered new elements when half lives are so short?

Posted: 11 May 2019 03:21 PM PDT

I am aware of the band of stability and what it means, and with the recent discovery of element 118 Og we now completed row 7 of the table.

What I dont understand is how are these new elements considered and confirmed as new elements if they only have half lives less than a few seconds Og being less than a few milliseconds, so how is it technically classified as an element if it isnt even stable?

submitted by /u/CMD2ElectricBoogaloo
[link] [comments]

Is it possible for there to be Earth bacteria now living on Mars because of the rovers we sent there?

Posted: 11 May 2019 08:57 PM PDT

A bit of a shower thought I had recently: Is it viable that humans have inadvertently colonized Mars with Earth bacteria that had attached themselves to the Mars rovers? Would it have all died on transit? If it did survive, is it a possibility that it could reproduce and thrive on the surface of Mars?

Thanks in advance.

submitted by /u/Stickaxe
[link] [comments]

What are the main structural differences between x-ray spectroscopy derived protein structures of the gamma-delta TCR versus the alpha-beta TCR?

Posted: 11 May 2019 02:14 PM PDT

What does cancer-free actually mean?

Posted: 11 May 2019 11:58 PM PDT

Does it mean there is not a single cancerous cell in your body?, Or is it like on probability basis, that you have a high chance of not getting cancer again?

submitted by /u/Amolk2207
[link] [comments]

Why does charcoal burn?

Posted: 11 May 2019 11:55 AM PDT

Charcoal is burnt wood, so why does it burn?

submitted by /u/ShavedPlatypuss
[link] [comments]

What actually increases risk of lung cancer when smoking?

Posted: 11 May 2019 03:03 PM PDT

I may get this completely wrong but my first guess is increased risk of denaturing your cells DNA due to the smoke, heat, chemicals, etc.

submitted by /u/_Kutler
[link] [comments]

Does our brain have data bandwidth limits?

Posted: 11 May 2019 09:33 PM PDT

Can bad weather affect the functioning of a radar?

Posted: 11 May 2019 09:01 PM PDT

How can we know one proton moves atp synthase ‘turbine’ one measure without being able to see the protein, let alone the specific mechanisms?

Posted: 11 May 2019 08:58 PM PDT

Is the turbine model just a theory?

Theres some interesting visuals on YouTube I would have never questioned, and multiple sources collaborate so it must be true, but my father posed the question and I was at a loss.

submitted by /u/FiveFiddyFive
[link] [comments]