What is the physiological difference between the tiredness that comes from too little sleep and the tiredness that comes from exertion? |
- What is the physiological difference between the tiredness that comes from too little sleep and the tiredness that comes from exertion?
- Does rotation affect a gravitational field?
- What is the Noether charge to electromagnetic duality?
- What, on a molecular level, makes a material a good insulator?
- Do we weigh more at night since the gravitational pull of the sun is compounding with that of Earth?
- Due to rapid expansion of the universe, will this result in our Milky Way being isolated from other galaxies to the point where we see nothing but darkness when we try to observe space?
- Why is it more accurate to say that chemicals will diffuse down a fugacity gradient than down a concentration gradient?
- Does the Earth get colder following a solar eclipse?
- Why do fusion reactions emit photons?
- How does one measure the magnetic field of an exoplanet?
- A nature article claims that light can exit an apparatus before it enters it, due to superluminal light propagation. How is this possible?
- Is it possible to surgically change a person's voice?
- How does our solar system's planet count compare to other solar systems?
- How does one's "Biological Clock" work? And is it possible to "reset" it?
- On Earth, when we see an old vehicle (a bus, passenger jet, battleship, etc), we see oxidation, oil leaks and chipped paint. What would a space vehicle look like after several years travelling around our solar system?
- How is epigenetic information copied to the daughter genome during DNA replication?
- Rainbows. Are there more colors?
- How to calculate the force between two magnets?
- How did sexual reproduction become a thing? Wouldn't two, complementary sexes have to evolve at the same time?
- What would happen if I use myself as an arrow with a bow in space ?
- Why is the circumference of a circle still 2*pi*r in warped spacetime?
- Why do we place so much emphasis on the 'habitable zones' of stars if atmospheres regulate temperature?
- How does an Iron heat up so quickly?
| Posted: 01 Aug 2016 08:49 AM PDT |
| Does rotation affect a gravitational field? Posted: 02 Aug 2016 06:04 AM PDT Is there any way to "feel" the difference from the gravitational field given by an object of X mass and an object of X mass thats rotating? Assuming the object is completely spherical I guess... [link] [comments]  |
| What is the Noether charge to electromagnetic duality? Posted: 02 Aug 2016 05:14 AM PDT EM duality says if you rotate by any angle in the E - B plane, that's a symmetry of maxwell's equations. Nöther's theorem states that for every continuous symmetry there is a conserved quantity. What is the conserved quantity for EM duality? I've found nothing through google, so maybe there's something I'm missing. [link] [comments]  |
| What, on a molecular level, makes a material a good insulator? Posted: 01 Aug 2016 08:22 PM PDT |
| Do we weigh more at night since the gravitational pull of the sun is compounding with that of Earth? Posted: 02 Aug 2016 05:42 AM PDT |
| Posted: 01 Aug 2016 06:58 PM PDT Just as the title states. The universe is expanding so dramatically that it is becoming more difficult to look further into space and time. With light being stretched for such long distances of travel, light will eventually fade out before reaching earth. In a few billion years or so, will space be so large that the nearest neighboring Galaxy - Andromeda Galaxy will be so far in space that we will not be able to see it? Future humans will look into the sky and see nothing. If so, is that the point in time were science will truly stop because we will not be able to study the Big Bang or any other activity in the universe. [link] [comments]  |
| Posted: 02 Aug 2016 07:28 AM PDT Chemical Engineer here with a question on everyone's favorite topic in my field FUGACITY (sarcasm). I have often heard that it is more accurate to say that a chemical will travel down a fugacity gradient than to say it will travel down a concentration gradient. Can someone please explain this and give me an example of a time when a chemical will travel down a fugacity gradient while traveling up a concentration gradient? Many thanks! [link] [comments]  |
| Does the Earth get colder following a solar eclipse? Posted: 01 Aug 2016 05:32 PM PDT Pretty much the title does the Earth get colder during or following a solar eclipse? If so how much would it fluctuate. [link] [comments]  |
| Why do fusion reactions emit photons? Posted: 02 Aug 2016 06:52 AM PDT Okay here's my confusion. Photons are force carriers for the electromagnetic force, gluons are force carriers for strong nuclear force, and gravitons are theoretical force carriers for gravity, right? Why do fusion reactions give off anything in the electromagnetic spectrum? Why don't they just emit strong nuclear force carriers (gluons), similar to how electrons give off photons when they change energy levels? Do they give off both and we only care about/detect the electromagnetic waves? I guess electrons changing energy levels would give off minuscule gravitational waves as well, right, since they are matter moving through spacetime? [link] [comments]  |
| How does one measure the magnetic field of an exoplanet? Posted: 01 Aug 2016 06:49 PM PDT I am curious how they figured out how much EM protection Juno needed for its trip. How do you measure that energy from here or satellite? [link] [comments]  |
| Posted: 01 Aug 2016 07:51 AM PDT This article claims that they have managed to increase the propagation speed of light inside a caesium gas so much that a light pulse can seem to exit before it has entered the medium. I tried to understand the reason for this, but I can't grasp it. Could anyone explain this to me ? [link] [comments]  |
| Is it possible to surgically change a person's voice? Posted: 01 Aug 2016 09:52 PM PDT |
| How does our solar system's planet count compare to other solar systems? Posted: 01 Aug 2016 03:59 PM PDT I'm curious as to whether we are typically below or above average in terms of how many planets we have in our solar system. I've noticed that in most space games there are typically around 3-5, is this based on anything or just pure science fiction? Are we technologically advanced enough to even compare ourselves yet? [link] [comments]  |
| How does one's "Biological Clock" work? And is it possible to "reset" it? Posted: 01 Aug 2016 07:07 PM PDT |
| Posted: 01 Aug 2016 04:34 PM PDT Is "weathering" something we'd see on a space ship? I know pits from micro-meteorites have dented windows on the Space Shuttle and ISS, but what would the effects of solar radiation, cosmic rays, and whatever else might be out there on a ship after a few decades? [link] [comments]  |
| How is epigenetic information copied to the daughter genome during DNA replication? Posted: 01 Aug 2016 02:55 PM PDT Epigenetics shows up occasionally in the news these days, with the suggestion that epigenetic changes (e.g. methylation) acquired during a parent's lifetime can be passed down to children. If this is true, how is that epigenetic information replicated when new DNA is created during cell division? [link] [comments]  |
| Rainbows. Are there more colors? Posted: 01 Aug 2016 04:03 PM PDT Okay so I was at home and I see a rainbow, super bright and a beauty! I notice it's got the normal ROYGBIV but past violet I notice some other colors. Is this possible? I posted pics to imgur which I will link. Pics were taken on iPhone 6s Plus. Additional colors were witnessed by my self and one other previous to taking a picture. And what you want to see. https://imgur.com/gallery/MygqN [link] [comments]  |
| How to calculate the force between two magnets? Posted: 01 Aug 2016 03:25 PM PDT I can't find the answer to this and it seemed simple. Could you people guide me please? [link] [comments]  |
| Posted: 01 Aug 2016 08:51 AM PDT |
| What would happen if I use myself as an arrow with a bow in space ? Posted: 01 Aug 2016 02:28 PM PDT Here's a drawing of the situation : http://i.imgur.com/oVj3iOK.png If I suppose that I won't hit the bow, and that no other forces are exerced on me, would I be propelled if I drop the handle ? [link] [comments]  |
| Why is the circumference of a circle still 2*pi*r in warped spacetime? Posted: 01 Aug 2016 11:23 AM PDT |
| Posted: 01 Aug 2016 01:30 PM PDT I searched to see if this had already been asked but of the 200 or so results I found about habitable zones, I couldn't see it, so apologies if I'm retreading old ground. OK so most people are aware of the concept of exoplanets orbiting around stars in habitable zone (or 'Goldilocks Zone' or whatever you want to call it), where it's just the right distance from its parent star to be neither too hot nor too cold, and thus may host extraterrestrial life. However, I was just watching this video about atmospheres and how it keeps us the right temperature compared to our moon, which is barren and has gigantic temperature fluctuations. But if this is the case and different celestial bodies have their own distinct atmospheres that have differing levels of heat retention, surely the whole concept of the Goldilocks Zone is negated? For instance, if we look at an exoplanet and say 'it's too far away from its star and thus is too cold to sustain life', is there not a chance that it could have a super-thick atmosphere that efficiently absorbs and traps the tiny amount of warmth from its parent star? Isn't the Goldilocks Zone us calculating the habitability of exoplanets based on just our own atmosphere's capabilities at regulating temperature? Or does the Goldilocks Zone take this into account? [link] [comments]  |
| How does an Iron heat up so quickly? Posted: 01 Aug 2016 04:35 PM PDT |
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