Pages

Monday, October 2, 2017

If doctors can fit babies with prescription eye ware when they can't talk, why do they need feedback from me to do the same thing?

If doctors can fit babies with prescription eye ware when they can't talk, why do they need feedback from me to do the same thing?

If doctors can fit babies with prescription eye ware when they can't talk, why do they need feedback from me to do the same thing?

Posted: 01 Oct 2017 07:20 PM PDT

What exactly happens when you have a knot in your back? If the muscle hasn’t actually tied itself up, has it hardened?

Posted: 02 Oct 2017 03:03 AM PDT

Are there documented cases or evidence supporting postpartum depression in animals other than humans?

Posted: 01 Oct 2017 08:37 PM PDT

Why can humans control an involuntary action (breathing) but not choose to control your heart rate?

Posted: 01 Oct 2017 02:52 PM PDT

What are the environmental side-effects of burning oil fields during wars?

Posted: 02 Oct 2017 01:53 AM PDT

I mean, it definitely doesn't look healthy when ISIS is burning oil fields in Iraq, or when Iraq was burning the oil fields in Kuwait.

However, is burning the oil straight from the fields any different from refining it then burning gasoline, or burning diesel? Does it even out in the long-term, even if it must create a massive amount of smog (or something) while it is burning?

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

Does 'mastering' fusion mean making current fusion reactor designs a lot more efficient, or is there a different design or process we are hoping to figure out?

Posted: 02 Oct 2017 07:38 AM PDT

You hear people talking about the amazing potentials if we master or 'have' easy fusion, while current designs are struggling to be positive in net energy output. Does 'having fusion' just mean making the current design a lot more efficient, or is there a specific design, process or way of approaching fusion we don't know how to do yet?

submitted by /u/Impriv4te
[link] [comments]

Are we wholly dependant on naturally-produced curare for surgery, or are there synthetic alternatives? If we have synthetics, how do they compare?

Posted: 02 Oct 2017 03:55 AM PDT

Does our moon have a name in common english?

Posted: 01 Oct 2017 08:00 AM PDT

Saturn's moons all have names, what is ours?

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

What is the radiation level on the ISS and Mars compared to Earth?

Posted: 02 Oct 2017 06:44 AM PDT

With all the news about humans going to Mars, and articles claiming that it could not be the best idea, I would really like to know what is the difference.

Basically, if Earth is very good (due to the "magnetic bubble") being a 10/10, and space is very bad (1/10) I was wondering how bad the radiation is on the ISS or on Mars.

Is there anything that can be done? Any kind of material good enough to be used as a shelter? Would underground construction on Mars (or the Moon) would make more sense?

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

What is the smallest size stars can have?

Posted: 02 Oct 2017 12:37 AM PDT

I just learned the difference between Big and Massive. If the least smallest mass a star can have is the fine line between gass giant and brown dwarf, what is the smallest size a star can have? Is it possible for it to be anything more than a brown dwarf?

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

What happens if an astronaut gets a nosebleed while in space?

Posted: 01 Oct 2017 12:27 PM PDT

I've heard that liquid balls up when exposed to the microgravity of space and this happening in a body part like the nose could be dangerous to the astronaut. Is there a protocol or something?

submitted by /u/bk2mummy4u
[link] [comments]

If a bowl of fresh strawberries is sprinkled with sugar, and a few minutes later the berries are covered with juice, how does that happened?

Posted: 01 Oct 2017 07:01 PM PDT

What exactly is the "mass" of an atom or a partitcle? And how did the particle have mass?

Posted: 02 Oct 2017 06:10 AM PDT

I've been reading some books and documents about this but they seem to be very difficult to understand.

I would love to be enlighted. Please, any one???

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

What happens if two electrons collide when they are orbiting a nucleus?

Posted: 02 Oct 2017 06:09 AM PDT

Just researching Cosmos. It got me thinking. As electrons orbit an atoms nucleus, what would happen if two of the electrons collided?

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

How do shoes affect your feet's bones and muscles?

Posted: 01 Oct 2017 06:43 PM PDT

How do Majorana Fermions exist? And why do people think that neutrinos are a example of a Majorana Fermion?

Posted: 02 Oct 2017 05:48 AM PDT

I was researching about Dirac fermions when I came across Majorana fermions. these fermions are supposedly their own antiparticle yet from what I've learnt, when particles interact with the counterparts they annihilate each other. So wouldn't Majorana fermions be constantly annihilating itself? Also if neutrinos are an example of a Majorana particle then what is beta decay emitting when the neutron changes to a proton? Thanks so much for the answers in advance!

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

Would it be possible to create helium-4 by introducing helium-3 to a neutron rich environment?

Posted: 02 Oct 2017 05:43 AM PDT

How long does it take UV rays absorbed by your skin to be converted to vitamin D?

Posted: 01 Oct 2017 02:01 PM PDT

I have a vitamin d deficiency so I've been sunning myself every day for thirty minutes. Only for a couple days so far though.

How long does it usually take for the absorbed nutrients from the sun to convert to vitamin D in one's body?

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

Is there a scent that distinguishes all (or most) female mammals from males? Can animals tell the difference between females and males of other species?

Posted: 01 Oct 2017 04:36 PM PDT

what sources do we have to understand climate in early historical times?

Posted: 01 Oct 2017 05:12 PM PDT

Why does light not bend when it hits perpendicular to a new medium?

Posted: 01 Oct 2017 10:40 AM PDT
vào lúc No comments:

Sunday, October 1, 2017

If the sea level rises, does the altitude of everything decreases ?

If the sea level rises, does the altitude of everything decreases ?

If the sea level rises, does the altitude of everything decreases ?

Posted: 30 Sep 2017 07:09 AM PDT

Is there any evidence of mammals (besides humans) being serial killers or murdering their own species for fun?

Posted: 30 Sep 2017 07:46 PM PDT

Microstates in statistical mechanics and Pauli's exclusion principle - how do you count "the number of possible positions"?

Posted: 01 Oct 2017 07:07 AM PDT

Space is continuous, right?

Microstates

How can you ever arrive at a finite number of "microscopic arrangements of particles" when counting W in Boltzmann's entropy equation?
S = k_B log W
It seems to me that there are infinite ways to arrange 1000 particles in a box while keeping the same volume, pressure, etc.

(I understand that introducing quantum mechanics changes this question a bit, but I'm also interested in the classical answer, since Boltzmann and his contemporaries only knew classical physics...)

Pauli Exclusion Principle

The same question goes to filling up phase space with electrons according to Pauli's exclusion principle. You can't have two electrons in the same quantum state, so if you stick to one position you have to stack them in a tower of increasing momentum. But what does "one position" even mean? If you move 10-700m to the left, does that count as a new position where you can start a new tower of momenta? Surely not.

How much space does one "quantum state slot" take up?
If they take up space, does this mean electrons are fat?

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

Are there thermal neutrinos?

Posted: 30 Sep 2017 09:36 PM PDT

So thermal neutrons are neutrons that come to thermal equilibrium with their surroundings. Do neutrinos do the same thing? Once created in stars and supernovae, would neutrinos "cool" down overtime? Plots like this indicate that "cooler" lower energy neutrinos should have smaller nuclear cross section. I usually imagine neutrinos as high energy particles zipping around. Could instead very low energy neutrinos be floating around not interacting with anything?

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

When you shine light at a mirror, does the amount of light in the room change?

Posted: 30 Sep 2017 09:20 PM PDT

This seems like a dumb question. But what if you looked at the light and it's reflection in the same visual frame? Then would the amount of light be double?

submitted by /u/lbon6201
[link] [comments]

How much energy would you need to create different types of mass, such as sub atomic particles, or even whole atoms?

Posted: 01 Oct 2017 05:35 AM PDT

Is there any research on the percentage of depressive outpatients that complain of loss of cognitive function(and of which type) even after their illness remission?

Posted: 30 Sep 2017 04:52 PM PDT

I am asking specifically for outpatients since it seems there is a difference of cognitive loss between 'inpatient' and 'outpatient' depression and even different loss of grey matter in several parts of the brain.

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

If we can use vaccines to "train" the immune system to fight diseases, is it possible to make an "anti-vaccine" that would condition it to NOT fight allergens?

Posted: 30 Sep 2017 10:51 PM PDT

I'm not really aware of precisely how vaccines work so forgive me if I have any misconceptions about them.

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

Can there be heat without matter?

Posted: 30 Sep 2017 06:33 PM PDT

How does the coordinate system account for tectonic shifts?

Posted: 01 Oct 2017 02:34 AM PDT

What is the bandwidth of the underwater cables that supply internet to the whole world? And what about the cable makes it so good at transmitting all that data?

Posted: 30 Sep 2017 11:40 PM PDT

There's a bunch of cables but there are soooo many more computers than cables that are connected. They must transmit a really large amount of data all the time so how do the cables meet the demand?

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

If an alien civilization within the Milky Way Galaxy were analyzing our Sun with exactly the same technology we have available to us on Earth today, would they be able to detect our planet and detect that life existed on it?

Posted: 30 Sep 2017 06:46 AM PDT

How does the brain map give sensation to a phantom limb?

Posted: 30 Sep 2017 02:55 PM PDT

From what I've read there is a brain map that associates sensation of touch of each body part to a region of the brain. The hand and feet map to different brain regions for example. But do we have any idea of how each of those regions give rise to a conscious feeling of being touched in the hand or feet respectively. When we are touched in the hand or foot a brain imaging would show different regions of the brain activating. But what is giving rise to the conscious awareness of "where" on the body is being touched?

I mean like it seems that like if someone was born with an extra finger that they would have a sensation of knowing when that finger is touched. Yet everyone else without a sixth finger would never have that sensation of a sixth finger touched no matter what implanted electrodes were stimulating our brain. What is different in their brain that gives rise to conscious spatial awareness of a sixth finger being touched?

I don't know how to articulate this question precisely. I hope someone understands what I'm getting at.

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

Why did the STS do roll reversals instead of descending from a higher longitude?

Posted: 30 Sep 2017 03:44 PM PDT

After watching a video on how to land the space shuttle I'm curious as to why did the STS do roll-reversals instead of beginning descent from a higher longitude (I'm not sure this is the correct term so I did a picture): link
Would the azimuth error be too high and require roll reversals anyway?

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

What is the difference between these equations involving Strangeness Conservation that makes one permissible and one not?

Posted: 30 Sep 2017 08:51 AM PDT

Why is Λ0 -> p + π- permissible, but K- + p -> n + π0 not?

uds -> uud + du and su + uud -> udd + uu

Both involve a change of quark flavour - the s quark of the Λ0 and K- both becoming down quarks - implying the Weak Interaction and hence Strangeness not necessarily being conserved. So what is different between the two interactions that means the second is a no-no?

The two interactions have been pulled from different sources. The first is from Hyperphysics and the second is from a CGP textbook which claims it is not allowed. Admittedly the textbook does not even approach the idea that Strangeness is not always conserved...

EDIT: got the sources mixed up.

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

Why is it harder to breathe when sticking your head out of a fast moving vehicle?

Posted: 30 Sep 2017 06:23 PM PDT

Why a particle and its antiparticle annihilate each other when they touch but not all types of matter with opposite charges?

Posted: 30 Sep 2017 11:49 AM PDT
vào lúc No comments:

Saturday, September 30, 2017

How does my phone know how much battery is left?

How does my phone know how much battery is left?

How does my phone know how much battery is left?

Posted: 29 Sep 2017 04:20 PM PDT

What is the phone juice people?

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

Is there a way or has there ever been a case where protons are removed from the nucleus of an atom?

Posted: 29 Sep 2017 06:28 PM PDT

I don't know much about atoms and science-y things, but I've been wondering if there ever has been an instance where protons were removed from the nucleus of an atom, or if there's a theoretical way to do so.

If there has been, what affect did it have on the atom. If it's purely theoretical, then how could it be accomplished

If it can't be done, then why?

submitted by /u/fan-1
[link] [comments]

How hazardous and toxic will it be if a nuclear warhead containing plutonium would disintegrate at reentry without detonation?

Posted: 30 Sep 2017 02:09 AM PDT

With all the tensions between US-NK and the later's reentry test failures, I'm curious if even a failed nuclear warhead can have grave consequences on its target. Plutonium is one of the most toxic elements to life that we know of if ingested somehow into our bodies. Lets presume that the reentry vehicle of the North Koreans is similar to the american W87. The materials used in the design of the cone are state secret (Most likely something with good refractory properties, like carbon etc), but lets assume that the entire vehicle fails/cracks open exposing the peanut core at high altitude and allows it to burn into the atmosphere. Are there any safety mechanisms for this situation, at least used by the nations that have experience with nuclear weapons? What is the trigger of such a weapon, and could such a fail activate it and detonate it into the high atmosphere?

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

if we ever run out of copper, for ecample for cables, what's our best bet in terms of price and availability?

Posted: 30 Sep 2017 04:21 AM PDT

How different would modern man be if we evolved as herbivores?

Posted: 29 Sep 2017 07:28 PM PDT

If we know the bacteria that cause pneumonia why can't we make a vaccine for it?

Posted: 30 Sep 2017 04:46 AM PDT

Constant acceleration/deceleration as artificial gravity?

Posted: 30 Sep 2017 05:27 AM PDT

One of the main challenges of a crewed mission to Mars is the prolonged period of microgravity and its negative health effects. Setting aside the limitations of fuel, would it be possible to launch a ship that had a constant one-g acceleration until halfway to Mars, and then a constant one-g deceleration for the rest of the trip? I know orbital mechanics are tricky, so I'm not sure that it would work, but if we somehow had an engine and fuel source that could do it, the crew would effectively have artificial gravity for almost the entire trip.

submitted by /u/skip6235
[link] [comments]

Why can the large majority of other mammals walk directly after birth, whilst humans during infancy cannot?

Posted: 29 Sep 2017 11:41 PM PDT

Where do the atoms come from when life is created?

Posted: 29 Sep 2017 01:21 PM PDT

Are the pulled from the atmosphere? Generated somehow? Ex: when offspring is created, I get the cellular reproduction part, but not where these atoms come from to create the new cells.

submitted by /u/ObiWan-Shinoobi
[link] [comments]

How long did it take for islands to breakaway from their continents?

Posted: 29 Sep 2017 11:54 PM PDT

So Madagascar broke away from Africa over 120 million years ago: But exactly how long did it take for the island to completely break off? What would the transition look like?

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

How does algae reproduce in mountain streams without being "flushed out"?

Posted: 29 Sep 2017 01:25 PM PDT

I've been taught that algae reproduces either asexually or through spores. How then do algal populations persist in mountain streams? Without a means of upstream dispersal, it seems that any population would be flushed downstream within a number of generations.

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

Given a Mercator Projection map of the Earth a metre wide, how tall would it have to be to have a scale of 1:1 at the top and bottom of the map?

Posted: 29 Sep 2017 12:27 PM PDT

Would sound waves propagate through any arbitrary amount of gas in the vacuum of space?

Posted: 29 Sep 2017 06:15 PM PDT

If you and I were floating in space, totally exposed, and I screamed directly into your ear with lungs full of air, would you hear anything? In other words, is the air in my lungs voluminous enough to allow sound to travel through over short distances in a vacuum?

submitted by /u/jmd9qs
[link] [comments]

Does the human brain have a max capacity for names? Do we start to forget people's names to make room for new ones?

Posted: 29 Sep 2017 11:35 AM PDT

Would the light from Proxima Centauri look noticably redder as seen from its planet? How does the color of a red dwarf compare to the color of a noticably red visible sky star like Betelgeuse?

Posted: 29 Sep 2017 08:39 PM PDT

What is the difference between machine learning and data analytics?

Posted: 29 Sep 2017 10:46 AM PDT

I understand that machine learning is a way to teach AIs by using large data sets while big data analytics is essentially finding solutions using big data sets, but they seem to have the same outcome. I can see how I'm comparing apples and oranges here, but I can't seem to get my head around it. Please help.

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