What happens in wet wood that allows you to bend it? |
- What happens in wet wood that allows you to bend it?
- Why do bubbles in carbonated drinks or beers form from imperfections or scratches in glass? What causes them to form from surface imperfections vs randomly within the liquid?
- When a star is forming does it reach a critical temperature and 'turn on' or is there a smoother transition from protostar to star?
- Carriers of bacterial pathogens: Can populations of bacteria like S. aeurus, or Salmonella enterica in healthy carriers play an integral part in one's microbiome?
- Are energies in general relativity "relative" or "absolute"?
- Do all EM radiation carry the same momentum?
- Are there any superconductors that would work on Earth orbit without requiring artificial cooling?
- Why does the sound of cold water hitting steel sound different than hot water hitting steel?
- How do scientists determine how many millions of years ago 2 or more separate organisms shared a common ancestor?
- Why are elements/isotopes with odd numbered atomic mass' fissile while their even numbered isotopes are not?
- How can water be both ionized and electrically neutral?
- What is the most basic form of life that still displays sleep-like behavior?
- Can some one explain synaptic pruning to me?
- How would the interstellar medium behave for an object traveling at relativistic velocities?
- Why is turbulence less dangerous than it seems, and when should we actually be worried while on a flight?
- Is there a limit to successive stimulated emission?
- Is it possible to measure single photons with a common CCD-Sensor?
- Are all gas in space ionized?
| What happens in wet wood that allows you to bend it? Posted: 12 Mar 2017 11:06 AM PDT To bend wood you have to wet it, whether through steaming or just water. What changes within the wood which allows the wood to be bent? [link] [comments]  |
| Posted: 12 Mar 2017 09:20 AM PDT |
| Posted: 12 Mar 2017 07:46 PM PDT |
| Posted: 12 Mar 2017 08:13 PM PDT Has it been shown that typically pathogenic bacteria like the examples listed can play an important (nonpathogenic or even benificial ) part in our bodies? [link] [comments]  |
| Are energies in general relativity "relative" or "absolute"? Posted: 12 Mar 2017 01:21 PM PDT Within quantum mechanics, energy zeros are arbitrary and only energy differences affect the dynamics of a system. Shifting the energy higher or lower will simply cause a rotation of the global phase of a system. However within general relativity energy warps space. If I add a field of constant energy field over the whole universe (with no spatial variation) does this alter dynamics within the universe? I feel at zero time after this change it does not since the gravitational field from this extra mass will cancel out at every point (except at the boundaries). However, after some time passes the extra energy field may be attracted to other masses and this uniformity will break down and then the energy field will start having an effect? It seems therefore that energy is an absolute quantity, but I am not sure about my analysis. This seems quite profound to me that there could be this difference between our two most fundamental theories of how the universe works. If there is a zero of energy, what is it? Does this relate to the cosmological constant etc? [link] [comments]  |
| Do all EM radiation carry the same momentum? Posted: 13 Mar 2017 06:28 AM PDT Since all EM radiation is photons traveling at c, do they all have the same momentum? Or does their wave length play into it too? If you had two foils being hit by waves at different wave lengths, would one travel faster than the other? [link] [comments]  |
| Are there any superconductors that would work on Earth orbit without requiring artificial cooling? Posted: 13 Mar 2017 12:28 AM PDT If so what use could this have currently out in the foreseeable future? [link] [comments]  |
| Why does the sound of cold water hitting steel sound different than hot water hitting steel? Posted: 13 Mar 2017 06:15 AM PDT Yesterday at work I was cleaning the sink and I heard that the cold water made a different sound than hot water when it hit the sink. [link] [comments]  |
| Posted: 12 Mar 2017 01:08 PM PDT I mostly understand the process of how they determine what the common ancestors were, but I don't understand how they place a time on it. This question was sparked by this post about beetles and ants, and in it, the scientists determined that the 12 beetles examined shared a common ancestor ~105 million years ago. How do scientists go about determining the time period for when these species started to evolve separately? [link] [comments]  |
| Posted: 12 Mar 2017 08:32 PM PDT Just curious, reading on Plutonium 239, 241 and obviously U-235 and its neutronics. Also, why are cross sections of even numbered atoms not the same as odd numbered, ie Li-6 and Li-7 and B-10 and B-9? Thanks. [link] [comments]  |
| How can water be both ionized and electrically neutral? Posted: 12 Mar 2017 12:49 PM PDT From this site:
I don't understand how the last sentence does not contradict the rest of the paragraph. [link] [comments]  |
| What is the most basic form of life that still displays sleep-like behavior? Posted: 12 Mar 2017 09:33 AM PDT |
| Can some one explain synaptic pruning to me? Posted: 12 Mar 2017 07:03 PM PDT I've gone to other places to look for answers but none of it is making much sense. [link] [comments]  |
| How would the interstellar medium behave for an object traveling at relativistic velocities? Posted: 12 Mar 2017 08:47 AM PDT If we could build a spacecraft to travel at significant fraction of the speed of light, would the interstellar medium be a factor worth considering? Would it cause drag, or compress into a shock wave? Could it cause damage to the spacecraft? [link] [comments]  |
| Posted: 12 Mar 2017 11:32 AM PDT |
| Is there a limit to successive stimulated emission? Posted: 12 Mar 2017 06:51 PM PDT If you have a single Hydrogen atom in the excited state, it can emit a photon corresponding to the 21 cm line. But if for example there is a long linear chain of Hydrogen atoms with a velocity gradient (i.e. atom 1 at the beginning of the chain is moving at 1 m/s, atom 2 moving 2 m/s, atom 3 moving 3 m/s, ..., atom N moving N m/s), then is there a limit to what N can be if I want atom 1 to induce stimulated emission in atom N? Since atom 1 will emit a photon at approximately the 21 cm line, it will also be able to stimulate atoms near it to emit a photon. But atom N (= 108 m/s) which is moving at 108 m/s would observe the incoming stimulating photon at significant redshift and thus a frequency shift away from 21 cm. Thus I am wondering: is there a limit, Nmax , for this frequency shift beyond which the atom is unlikely to be stimulated? Perhaps it is not a strict cutoff, but how does stimulated emission vary based on the frequency difference of the incoming photon's frequency versus its own transition frequency? [link] [comments]  |
| Is it possible to measure single photons with a common CCD-Sensor? Posted: 12 Mar 2017 01:19 PM PDT I am wondering if it is possible to use a simple CCD-Sensor to detect single photons? If so, what would be the best/simplest way to perform a detection experiment? Also is there any way to emit single photons with simple/ cheap devices you can buy on ebay for example? [link] [comments]  |
| Posted: 12 Mar 2017 08:53 AM PDT I'm thinking about interstellar travel and more specifically the problem of passing trough the interstellar medium. If you travel in speeds close to the speed of light, even small particles will be a pretty bad to collide with. However, as far as I know, all particles in space are ionized. Is this correct? If so, a strong magnetic field could be used to deflect the particles. Perhaps interstellar spaceships will also have a heatshield to mitigate the effects of incoming particles. I would also be interested in knowing more about different techniques for solving this problem [link] [comments]  |
| You are subscribed to email updates from AskScience: Got Questions? Get Answers.. To stop receiving these emails, you may unsubscribe now. | Email delivery powered by Google |
| Google Inc., 1600 Amphitheatre Parkway, Mountain View, CA 94043, United States | |
No comments:
Post a Comment