Does running a mile in 10 minutes burn the same number of calories as walking a mile in 20 minutes?

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• Does running a mile in 10 minutes burn the same number of calories as walking a mile in 20 minutes?
• Are there kinds of stars in the universe that are completely "abnormal" compared to stars that we know of?
• What are the differences between a GPU and a CPU? How is the GPU able to render graphics better?
• Will a concave mirror cancel out the convex mirror effect and vice versa?
• If an object with mass is moving near the speed of light towards me. Does the light reflected from that object "blue shift" into dangerous gamma rays?
• Why can't we create electricity to charge electric vehicles from the rotation of the wheels?
• In the current planning of long-term missions on the Moon, Mars and asteroids, how is the issue of bringing back to Earth terrestrial life forms being addressed?
• When people are allergic to certain animals, what is it about the animals that the human body reacts badly to?
• You're looking at a giant chunk of radioactive material. Are there any visible indications of decay?
• Why does the sun have a well defined surface instead of a smooth transition from dense to diffuse? In other words why doesn't the sun look fuzzy?
• How much energy will the ITER produce if successful--in layman's terms?
• How does a hypernova occur?
• Is there a material that is the equivalent of a superconductor, but for light instead of electricity?
• How do reaction mechanisms go from proposed to approved?
• Why do batteries have internal resistance?

Does running a mile in 10 minutes burn the same number of calories as walking a mile in 20 minutes? Posted: 02 Oct 2017 03:51 PM PDT submitted by /u/8337 [link] [comments]

Are there kinds of stars in the universe that are completely "abnormal" compared to stars that we know of? Posted: 02 Oct 2017 12:38 PM PDT I know of black holes, neutron stars / pulsars, brown dwarfs, and hypergiants... But what else? submitted by /u/IvanOfSpades [link] [comments]

What are the differences between a GPU and a CPU? How is the GPU able to render graphics better? Posted: 02 Oct 2017 06:35 PM PDT submitted by /u/ClF3FTW [link] [comments]

Will a concave mirror cancel out the convex mirror effect and vice versa? Posted: 02 Oct 2017 05:22 PM PDT Also are there any technologies that utilise this? submitted by /u/bananabenana [link] [comments]

If an object with mass is moving near the speed of light towards me. Does the light reflected from that object "blue shift" into dangerous gamma rays? Posted: 02 Oct 2017 06:54 PM PDT So it is my understanding that the light coming from objects moving toward an observer is "blue shifted" and the wavelengths compressed. If this is true can the light be so shifted that it is harmful to an observer? For example, if say "the flash" was holding a flashlight and running toward me at relativistic speeds, does the light get compressed to gamma rays? submitted by /u/SkunkMonkey420 [link] [comments]

Why can't we create electricity to charge electric vehicles from the rotation of the wheels? Posted: 02 Oct 2017 08:50 PM PDT submitted by /u/dtorg29 [link] [comments]

In the current planning of long-term missions on the Moon, Mars and asteroids, how is the issue of bringing back to Earth terrestrial life forms being addressed? Posted: 03 Oct 2017 02:04 AM PDT EDIT: I just want to make clear that I am thinking about terrestrial life forms that after surviving in space are brought back to Earth, not alien forms of life and I am not asking about protecting other planets, but the Earth. Since governments and private companies are planning long-term missions, colonies and mining activities on other celestial bodies, and given that some terrestrial life forms will survive and become very resistant to harsh conditions, what measures are being established now while planning those missions in order to avoid spreading these organisms on Earth? submitted by /u/luxux3 [link] [comments]

When people are allergic to certain animals, what is it about the animals that the human body reacts badly to? Posted: 03 Oct 2017 05:32 AM PDT submitted by /u/ory1994 [link] [comments]

You're looking at a giant chunk of radioactive material. Are there any visible indications of decay? Posted: 02 Oct 2017 04:13 PM PDT Like if the half-life of the isotope is 15 minutes or so, could you look at it and be able to see that it's decaying with the naked eye? submitted by /u/JohnnyStringbean [link] [comments]

Why does the sun have a well defined surface instead of a smooth transition from dense to diffuse? In other words why doesn't the sun look fuzzy? Posted: 02 Oct 2017 11:43 AM PDT Do the rules regarding the density of a plasma yield the observed solar surface? submitted by /u/_bobby_tables_ [link] [comments]

How much energy will the ITER produce if successful--in layman's terms? Posted: 02 Oct 2017 08:20 AM PDT I was reading this article which states that the ITER will produce 500MW of power out of an input of 50MW. The efficiency itself is very exciting, but what does it actually mean? How many homes can you run on that, and for how long? And will it produce 500MW a day, 500MW an hour...? Bonus: Assuming ITER works 100% as intended, will they use it commercially or is it just a proof-of-concept? What'll the lifespan of this behemoth of a reactor be in a best case scenario? submitted by /u/danherczak [link] [comments]

How does a hypernova occur? Posted: 02 Oct 2017 05:56 PM PDT I know it has something to do with a supernova having a supernova. submitted by /u/DeKingWalrus [link] [comments]

Is there a material that is the equivalent of a superconductor, but for light instead of electricity? Posted: 02 Oct 2017 12:47 PM PDT I understand that there are "superconducting" materials which can achieve an electrical resistance of zero ohms - is there a similar material or class of materials (not a vacuum) that can achieve a zero attenuation for light or other EM wavelengths? submitted by /u/foodfighter [link] [comments]

How do reaction mechanisms go from proposed to approved? Posted: 02 Oct 2017 05:19 PM PDT Pretty much what it says in the title, I've just been wondering lately, what makes a mechanism be recognized by the scientific community as the most likely thing that happens on the molecular/atomic level when the corresponding chemical reaction takes place in real life? submitted by /u/Three-Oh-Eight [link] [comments]

Why do batteries have internal resistance? Posted: 02 Oct 2017 08:44 AM PDT College student here with some questions after my basic EMF physics lecture. The prof brought up a lot of things but can't go over them due to time constraints so I'd ask here. 1) Why do batteries have internal resistance? 2) How does a defibrillator return the heart to a normal beating rate when such a current through the body would stop it in the first place? 3) Why has the conventional "positive charges flow" not been changed now we know it is electrons that move through the circuit? Thank you everyone for your time, I'm sure to be back with more questions in the future. submitted by /u/IamWongg [link] [comments]

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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?

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• 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?
• What exactly happens when you have a knot in your back? If the muscle hasn’t actually tied itself up, has it hardened?
• Are there documented cases or evidence supporting postpartum depression in animals other than humans?
• Why can humans control an involuntary action (breathing) but not choose to control your heart rate?
• What are the environmental side-effects of burning oil fields during wars?
• 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?
• Are we wholly dependant on naturally-produced curare for surgery, or are there synthetic alternatives? If we have synthetics, how do they compare?
• Does our moon have a name in common english?
• What is the radiation level on the ISS and Mars compared to Earth?
• What is the smallest size stars can have?
• What happens if an astronaut gets a nosebleed while in space?
• 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?
• What exactly is the "mass" of an atom or a partitcle? And how did the particle have mass?
• What happens if two electrons collide when they are orbiting a nucleus?
• How do shoes affect your feet's bones and muscles?
• How do Majorana Fermions exist? And why do people think that neutrinos are a example of a Majorana Fermion?
• Would it be possible to create helium-4 by introducing helium-3 to a neutron rich environment?
• How long does it take UV rays absorbed by your skin to be converted to vitamin D?
• 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?
• what sources do we have to understand climate in early historical times?
• Why does light not bend when it hits perpendicular to a new medium?

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

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 submitted by /u/thebulge93 [link] [comments]

Are there documented cases or evidence supporting postpartum depression in animals other than humans? Posted: 01 Oct 2017 08:37 PM PDT submitted by /u/karineha [link] [comments]

Why can humans control an involuntary action (breathing) but not choose to control your heart rate? Posted: 01 Oct 2017 02:52 PM PDT submitted by /u/leftfootedeagle [link] [comments]

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 submitted by /u/Gargatua13013 [link] [comments]

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

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 submitted by /u/drfrango69 [link] [comments]

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

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

what sources do we have to understand climate in early historical times? Posted: 01 Oct 2017 05:12 PM PDT submitted by /u/JaxxManican [link] [comments]

Why does light not bend when it hits perpendicular to a new medium? Posted: 01 Oct 2017 10:40 AM PDT submitted by /u/skierman98 [link] [comments]

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

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• If the sea level rises, does the altitude of everything decreases ?
• Is there any evidence of mammals (besides humans) being serial killers or murdering their own species for fun?
• Microstates in statistical mechanics and Pauli's exclusion principle - how do you count "the number of possible positions"?
• Are there thermal neutrinos?
• When you shine light at a mirror, does the amount of light in the room change?
• How much energy would you need to create different types of mass, such as sub atomic particles, or even whole atoms?
• 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?
• 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?
• Can there be heat without matter?
• How does the coordinate system account for tectonic shifts?
• 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?
• 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?
• How does the brain map give sensation to a phantom limb?
• Why did the STS do roll reversals instead of descending from a higher longitude?
• What is the difference between these equations involving Strangeness Conservation that makes one permissible and one not?
• Why is it harder to breathe when sticking your head out of a fast moving vehicle?
• Why a particle and its antiparticle annihilate each other when they touch but not all types of matter with opposite charges?

If the sea level rises, does the altitude of everything decreases ? Posted: 30 Sep 2017 07:09 AM PDT submitted by /u/zenef [link] [comments]

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

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 submitted by /u/AidosDS42 [link] [comments]

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

How does the coordinate system account for tectonic shifts? Posted: 01 Oct 2017 02:34 AM PDT submitted by /u/14CaPsLocK14 [link] [comments]

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

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

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

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