Pages

Thursday, March 31, 2016

What really happens when I "get used" to cold water?

What really happens when I "get used" to cold water?

What really happens when I "get used" to cold water?

Posted: 30 Mar 2016 11:34 PM PDT

When I wash or swim in cold water, after a while the water starts to feel warm. I've swum in a glacial runoff lake and it felt warm after a while, even though I'm sure my body was working very hard to keep from losing all its heat. Thanks!

submitted by /u/R07734
[link] [comments]

In regards to projectile motions, why can the initial velocity of the object found at one angle be used to solve for variables at different?

Posted: 30 Mar 2016 07:09 PM PDT

What I mean by that is if we have the initial velocity for an object being thrust outward at a specified angle, what proof do we have to say that we can use that initial velocity to theoretically solve for say, the distance the object will travel at a different launch angle or the time the object will be in the air for a different angle?

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

How did we get the high resolution photos of the bright spots on Ceres?

Posted: 30 Mar 2016 11:41 PM PDT

Does redshifted light have a higher energi level than a red light shone here on earth?

Posted: 31 Mar 2016 02:45 AM PDT

I know that blue light has a higher foton-energy than red light. So if we say a theoretical blue light was shining far away from earth, so far away it gets redshifted to red light. Has the foton-energy in the light changed on its travels to earth? Or does it still have the same energy as it had when it was blue?

I understand that redshift is caused by the galaxy is stretching but it seems weird that a redshifted red light could have higher foton-energi than a red light (with the same wavelength) shone on earth.

Edit: Changed "energy level" to "foton-energy"

submitted by /u/TheNumber999
[link] [comments]

If the G1.9+0.3 supernova remnant is 25000 LY away, how do we know it's only 110 years old? Is there a specific piece of the event that is being dated?

Posted: 30 Mar 2016 05:04 PM PDT

I'm aware the event actually took place roughly 25,000 years ago, and strictly hung up on how the age of 110 years old was determined.

If the remnant itself is only 110 years old, how can we observe it presently?

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

If I change the amount of Gauge Bosons in a system, will that affect in any way the strength of their respective interaction/force?

Posted: 30 Mar 2016 10:03 PM PDT

Do "photonic booms" happen?

Posted: 30 Mar 2016 03:26 PM PDT

I suppose there's no way to know for sure, but if something moves faster than the speed of light, would it create a "boom" of light like a plane does when it moves faster than sound?

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

Were there calculations for visiting the moon prior to the development of the first rockets?

Posted: 29 Mar 2016 12:39 PM PDT

For example, was it done as a mathematical experiment as to what it would take to get to the Moon or some other orbital body?

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

Do neurons have their own genome?

Posted: 30 Mar 2016 04:50 PM PDT

My AP Biology always said that all the cells in a your body have the same DNA but a few articles on the internet like this one ( https://www.sciencenews.org/article/brain-cells%E2%80%99-dna-differs ) say that neurons often have different ones and even unique to a specific neuron. So who is right?

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

What are the length scales involved in degeneracy pressure?

Posted: 30 Mar 2016 06:48 PM PDT

In discussions about degeneracy pressure and the Pauli exclusion principle, it is common for people to talk about fermions that are "close together" not being able to occupy the same quantum state. What is close together? I guess since it is maybe more accurate to say that exclusion principle really says that the wave function of fermions is anti-symmetric, maybe the question should be at what point is a system too large to specify a wave function?

The example that I'm trying to better understand is the white dwarf or neutron star example. Certainly these are large systems from a quantum perspective. Is it that within the star, there can exist a single wave function that describes all of the, say, electrons, and therefore no 2 electrons in that star can occupy the same quantum state?

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

How fast would I have to tear paper for it to burst into flames?

Posted: 30 Mar 2016 06:23 AM PDT

The negative side of the square root does not matter?

Posted: 30 Mar 2016 07:24 PM PDT

I don't believe the title, but this is the impression people on the internet have been giving me when solving this math problem.

I am not talking about sqrt (-6)

I am talking about sqrt (36)=+/-6

Can someone give me an example why it is important, I mean why would we be taught that the sqrt (36) is +6 and -6?

The problem is contextless and people keep telling me we just take the principle square root...when the question saya nothing but sqrt (36). There is another variation, but at the end, you get +/-6.

I dont get why we assume to take the principle square root.

I am also shown pictures of the sqrt(x) graph but the reason they dont show the negative valuesnis because that would go against the definition of a function! AKA, we cant display a fuction where x has 2 values, it can only have one!

Thanks for any help.

Or learning incase i am wrong.

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

How come each vibrating particle in a mechanical wave doesn't transmit the energy equally to the particle before as well as after it?

Posted: 30 Mar 2016 11:09 AM PDT

In other words, what make waves one way?

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

How safe would it be to wear a ring made out of pure osmium?

Posted: 30 Mar 2016 07:22 AM PDT

I've looked through this quite a bit out of curiosity. On some old posts on other forums, people have mentioned how it can be pretty toxic for you due to osmium's volatile and deadly oxide, osmium tetroxide, however upon doing some of my own research what I found was that as a pure metal under normal conditions, osmium is fairly unreactive, only forming the tetroxide when in a powder form or if heated to 400C, at which point if it ever happens i'd be dead anyways :(

So how safe would it be to wear a ring made out of pure osmium, for a short time or for a few/many years? Also, would it tarnish over time or keep its natural blue-silver color? (and if it does tarnish, how fast would it tarnish importantly and how safe would it be, as osmium can also form the safer, non-toxic osmium dioxide as well, and would there be any way to remove this tarnish?) As a side note: I found a site that sells them, but it isn't an english company and the rings look more like crystals, whereas I was hoping for a normal metal ring, such as in the shape of a plain gold/platinum one

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

Pangea Location?

Posted: 30 Mar 2016 07:09 PM PDT

I asked my geology teacher this the other day but she could not give me an answer. If I were to look on a globe, where on it would the Supercontinent Pangea have been located at relative to our current world map?

submitted by /u/Exar88
[link] [comments]

How does a Red Giant gain its mass?

Posted: 30 Mar 2016 12:09 PM PDT

How does something so small become so large without adding any physical elements to become larger?

submitted by /u/Kryptic_Anthology
[link] [comments]
vào lúc No comments:

Wednesday, March 30, 2016

AskScience AMA: We are scientists in the food and feed laboratories that test imported products for dangerous pathogens as well as illegal dyes, metals, antibiotics and more. Ask us anything!

AskScience AMA: We are scientists in the food and feed laboratories that test imported products for dangerous pathogens as well as illegal dyes, metals, antibiotics and more. Ask us anything!

AskScience AMA: We are scientists in the food and feed laboratories that test imported products for dangerous pathogens as well as illegal dyes, metals, antibiotics and more. Ask us anything!

Posted: 30 Mar 2016 04:37 AM PDT

We are scientists at state food and feed laboratories. Among other things, we test products imported into the US for dangerous pathogens as well as illegal dyes, metals, antibiotics and more.

In addition, we work with the Association for Public Health Laboratories (APHL) to assist food and animal feed testing laboratories to achieve, enhance and/or maintain accreditation to ISO/IEC 17025:2005. This accreditation is key to creating a national integrated food safety system. Accreditation Support for Food and Animal Feed Testing Laboratories

Want to hear more about our work and the fascinating things we've come across?

We will be back at 10 am EST (7 am PST, 3 pm UTC) to answer your questions, Ask us anything!

We are:

Cynthia Mangione, BA

Food Laboratory Specialist 2 – Microbiology QAO

Food Laboratory Division

New York State Department of Agriculture and Markets Proof

Stephanie Brock, BS

Radiation Health Supervisor

Radiation/Environmental Monitoring Section

Radiation Health Branch

Kentucky Department for Public Health Proof

Edit: Our colleagues had various emergencies and are unable to participate today. Yeah, we're disappointed too. We do have some others on speed-dial if we need to phone a friend! Hopefully we can still answer all the questions you have and/or point you in the right direction.

Edit: We're live! Thanks for having us!

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

Do super massive stars have a goldilocks zone?

Posted: 30 Mar 2016 04:06 AM PDT

And if so, how long would a year be on a planet within the zone?

submitted by /u/Slyfir20
[link] [comments]

Are all black holes the same density?

Posted: 30 Mar 2016 04:22 AM PDT

If we let a laptop on the ISS "freefall" and put a CD in the disk drive, would the laptop start spinning?

Posted: 30 Mar 2016 04:17 AM PDT

In fact, do we need a CD? Would the internal hard drive be enough to spin the laptop on its own?

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

Would an explosive missile be effective in space? Moreover, would concussive blasts have any effect?

Posted: 30 Mar 2016 03:52 AM PDT

Basically, a friend and I were talking about Sci-fi writing, and space combat therein. Thinking about the weapons used against each other I thought about missiles and confounded myself with the question in the title.

On the one hand, space is a vacuum, so there is no medium to convey the concussive force. But on the other hand, an explosive missile would create is own medium to convey the concussive force. Over a great distance, it would surely be less effective than in air, inverse square law etc as the gas expands. But in close proximity....would the pressure difference between the vacuum of space and the explosion actually cause the missile to be more effective?

I'm probably missing something hilariously obvious, but now I'm curious.

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

Why is solving a problem in 2D often "harder" than solving it in 3D?

Posted: 29 Mar 2016 08:53 PM PDT

For example, in my PDEs class we were able to derive the spherical means formula for the solution of the wave equation in 3D with a couple changes of variables and a little bit of work. But to derive it in 2D, we had to embed the problem in 3D but make it uniform across one of the spatial coordinates. This example in particular raises my question because it seems the obvious answer to my question is that 1D and 3D are somehow more "alike" than 1D and 2D because they are both odd dimensions, but the 1D spherical means formula (D'Alambert's solution) seems to share features of both the 2D and 3D cases, in that the 2D formula involves only averages over balls, the 3D formula involves only averages over spheres, and the 1D formula involves an average over a sphere and an average over a ball.

I've also encountered this sort of situation in my statistical mechanics class. I forget what exactly we were deriving, but I believe it was something to do with magnetization and the expressions in 1D and 3D involved only hyperbolic trig functions while in the 2D case we encountered Bessel functions.

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

If I had a very fast and accurate camera, could I see a speaker cone move sample by sample?

Posted: 29 Mar 2016 10:27 PM PDT

Let's assume we're playing CD audio through a speaker. Would each sample of the waveform be detectable as pauses or slowdowns of the cone? Sense suggests there would be capacitors "smoothing out" the waveform at higher frequencies, but surely some effect could remain?

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

Ask Anything Wednesday - Economics, Political Science, Linguistics, Anthropology

Posted: 30 Mar 2016 08:02 AM PDT

Welcome to our weekly feature, Ask Anything Wednesday - this week we are focusing on Economics, Political Science, Linguistics, Anthropology

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
[link] [comments]

How are methanogens able to produce energy?

Posted: 30 Mar 2016 07:25 AM PDT

First, I am biochemist (considering myself one as I am in my last semester of undergraduate education) so feel free to answer as technically as you are willing. I know essentially nothing about methanogens, but I am just curious how they are able to produce energy by reduction of CO2 to methane since this should involve putting in more energy than you receive from breaking C-O bonds. I believe they don't perform photosynthesis or something similar right? So they couldn't be getting energy from light as in plants. Thanks for the answer!

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

What does the overlap between the Wavelength ranges of different EM types mean for individual photons?

Posted: 29 Mar 2016 01:27 PM PDT

This is something I've been confused about for quite a while.

According to this image, there's overlap between the ranges of different types of EM radiation. So for example, from ~10-12 m to ~10-9 m, the ranges of gamma rays and x-rays overlap. Does that mean that all photons with wavelengths of (for example) 10-10 m display properties of both gamma rays and x-rays, or does that mean that some photons with wavelength 10-10 m are gamma ray photons, and some are x-ray photons?

Considering what I know about the various possible properties of photons, I'm guessing it's the former, but I've never seen it explained and I wanted to be sure.

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

What would a highly curved universe look like to an inside observer?

Posted: 30 Mar 2016 05:12 AM PDT

This might be more of a mathematics question than a physics question. Under the FLRW model there are two possibilities for a non-flat universe: positive curvature (3-sphere) or negative curvature (hyperbolic space). Let's assume a fixed static metric for simplicity, that the universe has existed forever, and that the curvature is high enough to be noticeable.

Reasoning by analogy with the two dimensional case, I'd expect far away objects in the sphere to look bigger than in flat space, eventually covering all your field of vision when the object is at the antipode. Also, I think you would see an (inverted?) image of your back in the background at all times. In contrast, objects in the hyperbolic space would look much smaller than in flat space the further they are, since parallel lightrays eventually diverge.

Is this correct? Or are there other effects due to the finiteness of the speed of light? Does anything interesting happen if the observer is moving at relativistic speeds, and/or if we include a slight metric expansion? I'm basically trying to get a feel for the global aspects of the geometry from the perspective of someone inside.

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

Have there been any studies done on the effects of flushable wipes on the environment?

Posted: 30 Mar 2016 04:27 AM PDT

Would I experience higher gravity at the top of a mountain or at the bottom of an ocean trench?

Posted: 29 Mar 2016 02:18 PM PDT

In this question I am assuming that we are on earth, that the trench and mountain are the same displacement from sea level and that the rock around it is consistent density.

Would this change depending on the height of the mountain/trench or the density of the body that I am standing on?

submitted by /u/GRI23
[link] [comments]

We have harnessed kinetic and light energy (wind,sun) for our use, why have we not yet harnessed heat energy, from say volcanoes?

Posted: 30 Mar 2016 03:33 AM PDT

Does anyone know what this is? It looked like an ECG strip running across the sky.

Posted: 29 Mar 2016 02:22 PM PDT

How is it possible that we know of only a few (<20) species that engage in sex for pleasure, yet we have extensive lists of species that exhibit homosexual behavior?

Posted: 29 Mar 2016 10:36 PM PDT

I was under the impression that homosexual activity and sexual intercourse for pleasure went hand in hand.

Sources (Is Wikipedia okay?):

submitted by /u/whysoserious385
[link] [comments]

Is it possible to dehydrate an egg white without it denaturing?

Posted: 29 Mar 2016 12:36 PM PDT

And thus effectively isolate the proteins within? If this is not possible is there another way of isolating the proteins?

submitted by /u/5cienta
[link] [comments]

Does the speed of sound in water increase at high pressures?

Posted: 30 Mar 2016 01:28 AM PDT

Okay, here's my question and some thoughts:

1) Speed of sound in fluids= sqrt of (bulk modulus/density)

2) Water isn't very compressible. Even at high pressures the density doesn't increase very much.

3) I've read somewhere that the bulk modulus of water increases at high pressures.

So my question is, does the bulk modulus increase by such an amount under high pressure that it isn't significantly compensated by increase in density leading to overall significantly higher speed?

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

could there be another planet in our solarsystem?

Posted: 29 Mar 2016 10:11 AM PDT

if there was a planet, wich shares our path around the sun with the same speed, but allways half a rotation away, could we detect it? is it even possible to have two planets sharing the same path? if so, would we have noticed that by now? excuse my bad english, it is not my first language.

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

How big is the Asteroid Belt and how did it form?

Posted: 29 Mar 2016 02:02 PM PDT

I was recently linked to a doozy of an article. While this article is filled with all kinds of conspiracy theories, wild speculation, and little science, I wanted to investigate one of its claims.

Within the article, it claims that the Asteroid belt between Jupiter and Mars was formed by some kind of ancient planetary collision, which the article states was between a primordial planetary body and a moon of the Planet Nibiru (A.K.A., the dreaded Planet X). While its claims about Nibiru are wild, it made me realize that I have no idea what formed the Asteroid belt in the first place. What did form the Asteroid belt, was it the result of a massive planetary breakup?

My other question was how big is the Asteroid Belt, really? Are there any estimates of the total mass of the bodies therein? Surely, any potential collision would have had to be between two massive rocky planets to produce a debris field as large as the Asteroid Belt, to say nothing of the uniformity which I think the Asteroid Belt has.

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

Where does the ultraviolet region of the spectrum Reeaaally start?

Posted: 29 Mar 2016 02:27 PM PDT

OK, so textbooks will obviously all say it's at 400nm. But let's be serious, 400nm is just a nice round number. UV radiation is ionizing, right? So if E = hv and we can calculate the energy of the light based on the wavelength, what is the energy needed to ionize "a bond"? And then which bonds are relevant? It seems to me that you should be able to ionize some bonds using visible light, so which are the bonds that we should be concerned about when determining whether something is "UV" or not? Thanks in advance for your help!

submitted by /u/Photonlives23
[link] [comments]
vào lúc No comments:

Tuesday, March 29, 2016

Humans have a wide range of vision issues, and many require corrective lenses. How does the vision of different individuals in other species vary, and how do they handle having poor vision since corrective lenses are not an option?

Humans have a wide range of vision issues, and many require corrective lenses. How does the vision of different individuals in other species vary, and how do they handle having poor vision since corrective lenses are not an option?

Humans have a wide range of vision issues, and many require corrective lenses. How does the vision of different individuals in other species vary, and how do they handle having poor vision since corrective lenses are not an option?

Posted: 28 Mar 2016 08:36 AM PDT

Can someone explain why Quantum Entanglement is "bizarre?" (What makes it different from macroscopic conserved systems?)

Posted: 29 Mar 2016 01:35 AM PDT

I am completely confused about why it should come as a surprise so I must misunderstand something about it. From what I understand, Quantum Entanglement is two particles that in some way originated such that the total conserved value of a property in a system is known but what is not know is the constituent contribution of each particle in that system.

For example spin, we know two the total spin of two particles is zero but we don't know the individual spins of the particles. What I'm supposed to regard as "strange" is that measuring the spin on one of the particles supposedly deterministically causes the other particle to fall into the counter-spin - hence conserving the total spin in the system.

I must be missing something because I don't see anything strange about this. If I have a pool ball floating in space and I hit with a total known kinetic energy at another pool ball floating in space, after collision, each poolball's kinetic energy will sum to the total kinetic energy in the original ball (assuming a perfect system with no heat generated from collision). If I then measure one of the pool balls, I know the kinetic energy of the other. Nobody thinks this is weird and nobody says the pool balls are "entangled."

So, please, can someone tell me why this becomes weird on a quantum scale?

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

What keeps the protons in the nucleus of an atom from flying apart due to their positive charge?

Posted: 29 Mar 2016 03:15 AM PDT

Since neutrons do not have charge wouldn't each proton repel each other, a lot?

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

How exactly do geologists know the number of supercontinents that have formed in the past?

Posted: 29 Mar 2016 02:42 AM PDT

Is there hard evidence to support that supercontinents like Rodinia and Gondwana actually formed, and if there is, how do they estimate the time it took them to form/break up? I have began studying prehistoric life and I was just curious how they figure this shit out.

submitted by /u/Vergeof2
[link] [comments]

Does every substance have a melting point, even crystals?

Posted: 28 Mar 2016 10:49 PM PDT

I dug my fingernail into coconut oil while in the dark, and it made a blue glow. Is there some sort of chemical reaction happening?

Posted: 28 Mar 2016 10:12 AM PDT

To clarify...it was a brand new container of unrefined, virgin coconut oil. My finger nails are long and they are polished black. I dug my thumb nail in to scrape some oil out, pulling up so that the nail was used as a shovel. I was in an almost completely dark room when I did so, and upon scraping a blue glow would manifest around the tip of my nail. Any idea what is going on here?

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

I understand that Sine and Cosine are ratios describing the right-angled triangle, and can be represented on a unit circle. But how is the ratio "tan" represented on the unit circle? [More in description]

Posted: 28 Mar 2016 03:06 PM PDT

So I understand how Sin and Cosine work and entirely understand why it is represented on the unit circle as such.

But what I can't seem to understand is how the tan is dependent on an angle or why it is represented as a tangent extending to the x-axis. Could someone please help me consciously understand this. It would be much help.

Much thanks to the people who submit. This is helping a budding physicist!

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

How does the skull of different species grow into its particular shape?

Posted: 28 Mar 2016 08:43 PM PDT

Or more generally, what's the overall process of the body of different animals getting its shape, from overall shape to little details and how do genes influence those?

How does the human skull for example get its right shape so reliably with only minor differences from individual to individual, compared to entirely different shape of a dog skull for example and how does this shape form starting with a few cells (after differentiation)?

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

How Valid is the Theory of Geocentricism?

Posted: 28 Mar 2016 08:26 PM PDT

Recently a large portion of my family watched some fairly convincing (to the layman) on Geocentricism. Now I'm someone who's always open to new ideas, no matter how extreme. However after doing some Googleing all really only come across articles saying that the entire thing is a joke and was disproven long ago. I'd like to have a proper discussion with family about this, and I not being an expert on the subject, so any and all help would be greatly appreciated. If anyone could help me find some good articles for proofs of either the theory or for the earth actually revolving around the sun, I would be very grateful.

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

[Chemistry] Why is it unlikely that symmetrical molecules can turn plane-polarized light?

Posted: 28 Mar 2016 08:27 AM PDT

Could we further extend the complex plane to a third dimension? If so what would it represent.

Posted: 28 Mar 2016 02:12 PM PDT

We extended the number line to the complex plane. a + bi where i represents the root of -1. Is there a number system like so a + bi + ck where k represents something that can't be represented in the form a + bi?

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

How do objects (or atoms) transfer their temperature to each other?

Posted: 28 Mar 2016 11:49 AM PDT

During the Carboniferous Period, what percentage of the planet's land was covered in forests?

Posted: 28 Mar 2016 10:29 AM PDT

So I've been doing a bit of armchair research on the Carboniferous period, but can only find that trees did not decay like they do today, and that the global oxygen levels were 35% compared to 20.9% today, a 14.1% decrease.

I would assume this was because the planet had more vegetation, seeing as today forests cover 31% of the world's land, would that mean the planet's forest coverage was 35.37%? Seeing as 14.1% of 31% is 4.37%.

I'm sure there are other factors to oxygen percentage in the atmosphere, such as herbivores and other respiratory animals processing O2 and producing CO2. The 35.37% is probably a bit lower than the actual number due to these factors as well as other factors such as volcanic activity, sea levels, etc.

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

Why is it more difficult to walk up an inclined treadmill compared to a level one, even though my height (and hence gravitational potential) doesn't actually increase?

Posted: 28 Mar 2016 07:30 AM PDT

Can sugar directly cause diabetes?

Posted: 28 Mar 2016 08:26 AM PDT

Can it? im confused. I know it can at least indirectly cause type 2 diabetes, by causing weight gain. But if your a skinny bitch who eats a lot of sugar, do you got to fear dem diabetes?

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

How can water be heavier than the respective elements that make it up?

Posted: 28 Mar 2016 08:21 AM PDT

So I understand basically that electrolysis of water splits water into its base elements of Hydrogen and Oxygen, but how can combining them create something that is heavier than the sum of it's parts? How can both Hydrogen and Oxygen be lighter than water if they make up water?

Edit; Wow, this has been really eye opening to how little I understand chemistry. Thanks everyone that replied and I'll definitely be trying to learn more.

submitted by /u/the-derpinator
[link] [comments]

Why is it that South Carolina's lowcountry has a much higher risk of earthquakes than any other state east of the Appalachians?

Posted: 28 Mar 2016 06:09 PM PDT

I was looking at this map and noticed South Carolina has a higher risk of earthquakes than any other Eastern state. By a lot.

Now I live here, in the middle of that big scary purple blob, and haven't really felt any feelable earthquakes. The only ones are slight ones that at most sound like thunder or a car crash, not a giant building-shattering earthquake.

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

Why doesn't frequency affect current in the photoelectric effect?

Posted: 28 Mar 2016 10:40 AM PDT

Hello, I am trying to understand how the current works in the photoelectric effect. I understand that increasing light intensity increases the current. Presumably, more photons hitting the metal at a faster rate would cause faster electron discharge and move the current faster.

However, I have read that increasing the frequency or kinetic energy of photons has no effect on the current. I don't really understand this part. If electrons are discharged with greater energy, doesn't that mean they move faster and the current should be faster?

Lastly, I don't really understand amplitude. I know that amplitude is the measure of the top or bottom half of a wave and that this is a measure of how much energy a wave carries, but I don't really understand how the amplitude factors in to the photoelectric effect.. Why would greater amplitude increase the current?

Lastly, does the charged metal eventually totally lose its charge or become positive as the light shines on it?

Thanks for any help you can offer!

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

Why is cloning a human so much harder than cloning a sheep?

Posted: 28 Mar 2016 06:09 AM PDT

We cloned a sheep decades ago. And now China thinks they can finally clone a human.

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

Does losing blood via donation lower high blood pressure?

Posted: 28 Mar 2016 08:00 AM PDT

If so, could regular donation be treatment option?

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

Why is it that the inside of fresh water pipes that feed houses don't need regular cleaning?

Posted: 28 Mar 2016 06:25 AM PDT

Does a caloric deficit result in long-term changes to the brain, such as loss of brain mass?

Posted: 28 Mar 2016 06:49 AM PDT

Given that the brain uses a significant portion of our consumed calories, does maintaining a calorie deficit result in any significant change in the brain, or is it protected enough as a vital organ?

submitted by /u/BestLittleWhorehouse
[link] [comments]
vào lúc No comments:
Subscribe to: Posts (Atom)