If somebody across from me on a large field shot a gun while holding a walkie talkie with the speak button on, would you hear the sound first on the walkie talkie or from the sound itself? |
- If somebody across from me on a large field shot a gun while holding a walkie talkie with the speak button on, would you hear the sound first on the walkie talkie or from the sound itself?
- Why is it that human brains are able to "auto-pilot" certain commands, such as play the piano, video games, sports etc... But when we start to think about it, we completely lose rhythm?
- Do lucid dreamers have a better chance of waking up from a coma?
- How does a fan cool down a room?
- Do light particles weigh anything?
- When was it known that Jupiter was a gas giant? What did scientists think it might be like before then?
- What does the electric field for an electron "look like" in quantum mechanics?
- Why does Dyslexia exist?
- How does Google know my location even when I am using a laptop or a device with no GPS?
- What dictates the throttle ranges of rocket engines?
- What does your skin use to detect temperature changes?
- How will a curveball behave in vacuum?
- Will a morbidly obese mother birth an obese child, and if so, can it be prevented by switching diets?
- A question about the effects of gravity on small objects in space?
- [Physics] Why isn't Lithium used instead of Uranium in fission reactors?
- A few math questions based off Fermat's last theorem?
- Why does the digital root of every multiple of *n*-1 equal *n*-1 when working in base *n*?
- [Physics] How was it discovered that crystals have a lattice formation?
- How and why does temperature affect the resistivity of metal wires?
- Does such an element, which would go from gaseous state to solid as the temperature rises, exist?
- What conditions optimize cardiovascular recovery?
- What is the maximum limit for massive solid planets?
- Why do enantiomers rotate light?
| Posted: 19 Jul 2016 01:58 AM PDT So it was sports day yesterday at the school I volunteer at and I had this thought while watching the races getting started on the other side of the track. If a race was started with the starting button and the person with the start gun was holding a walkie talkie (radio) with the speak button activated, would I hear the sound first, or the projection of sound coming from the radio I was holding? I know nothing about waves and frequencies so I'm sorry if this is a dumb question. I'm training to be a music teacher so it isn't really my forte. [link] [comments]  |
| Posted: 18 Jul 2016 06:38 AM PDT |
| Do lucid dreamers have a better chance of waking up from a coma? Posted: 18 Jul 2016 08:14 AM PDT |
| How does a fan cool down a room? Posted: 19 Jul 2016 02:09 AM PDT like i understand how a ceiling fan can push hot air where you want i (heat rises etc.) but how does a desk fan which simply circulates air make a room feel colder? does it? is this just an illusion? [link] [comments]  |
| Do light particles weigh anything? Posted: 19 Jul 2016 01:26 AM PDT If they do, does a collective of particles exert a strong enough force to push an object. How much of a force does our sun exert on humans? [link] [comments]  |
| Posted: 19 Jul 2016 05:31 AM PDT I'm guessing it was known for longer than I would expect that Jupiter was large and light for its size. Gas giants are so different from earth, though, I figure classical scientists might not have had it figured out. When did science figure it out? Who did? What were some older theories (based in science, not mythology)? [link] [comments]  |
| What does the electric field for an electron "look like" in quantum mechanics? Posted: 18 Jul 2016 09:10 PM PDT I think I have a fairly decent layman's/conceptual understanding of QM. One thing I don't yet understand is the interaction of fields and particle positions. Classically, the electric field produced by an electron is described as vector field where each vector points at the electron, and each vector's length is inversely proportional to the square of its distance from the particle. OTOH, QM says a particle doesn't have a definite position, and instead describes the particle as a function that maps each position in space to the probability that the particle exists at that position. Given that, how does QM describe the electric field produced by an electron, since the electron's position is indefinite? Given the wavefunction for an electron, in which direction do the field's vectors point? Is the field's value at any given point in space actually a function mapping every possible vector to a probability (analogous to the wavefunction mapping every position to a probability)? Or is it a single vector, sort of a weighted average across all the possible positions for the electron? Follow up question: How does a particle's wavefunction interact with a field? Is the entire wavefunction of the particle deformed by the field? E.g. if we pretend the wavefunction is bread dough spread out on a counter, then the field would be a baker pushing/pulling the dough around on the counter, creating heaps and valleys (areas of higher/lower probability). Then, could wavefunction collapse be understood as some sort of process that causes the field to be deformed into something close to a Dirac delta function? Thanks for any answers you might have! [link] [comments]  |
| Posted: 18 Jul 2016 09:44 PM PDT Preface: I'm not saying dyslexia doesn't exist, I'm asking about how it does. Humans have only had written language for a very short period of time and literacy has only just recently become widespread in the past few centuries. How is it that there is a hereditary literacy disability? Does dyslexia have geographical or genetic group of origin like say, cystic fibrosis. [link] [comments]  |
| How does Google know my location even when I am using a laptop or a device with no GPS? Posted: 19 Jul 2016 07:16 AM PDT I have been wondering everytime I open my browser with location services enabled, it knows my location with a high accuracy. How does it manage that? I know my IP address plays a part but, I am sure you cannot just know exactly where I am using my IP address.Thanks in advance ya'll. [link] [comments]  |
| What dictates the throttle ranges of rocket engines? Posted: 18 Jul 2016 09:55 AM PDT I was reading a controls paper that was modeling the Apollo LM lander, and it mentions on Page 14 that "The [LM] engine was not throttleable in the range from 60% to 90%." Does anyone know why at this specific range? I thought that throttleability was usually based on a lower-bound, like 20% to 100%, where you can't throttle below 20% because the engine will flame-out. But this implies that you can throttle on either side of that range, just not within it. [link] [comments]  |
| What does your skin use to detect temperature changes? Posted: 19 Jul 2016 03:44 AM PDT The only difference between hot and cold objects to my knowledge is that the atoms/molecules inside the object are moving slower when it's cold and faster when it's hot. How does our skin detect the change in speed of something so small, or is there something I'm missing? [link] [comments]  |
| How will a curveball behave in vacuum? Posted: 19 Jul 2016 03:09 AM PDT Is it possible to throw a ball that will have a modified trajectory based on its angular momentum in a vacuum? Is the curving only due to air pressure? All the answers I found online indicate that it will not work in vacuum, but wouldn't it be the same principle as a gyroscope? An angular momentum vector that acts on the trajectory? [link] [comments]  |
| Posted: 18 Jul 2016 11:27 PM PDT Additionally, would switching diets be dangerous for the mother? I'd understand if going from an extremely fat-rich diet for years to a nearly fat-free diet would be dangerous. And maybe one last thing, would a C-section still be possible, with all the excess fat on the belly? [link] [comments]  |
| A question about the effects of gravity on small objects in space? Posted: 19 Jul 2016 02:58 AM PDT So let's assume that we have several household objects of varying size and density and we are observing them in the vacuum of outer space. Would the more massive objects show any signs of having gravity? Would the less dense objects begin to be attracted to the denser ones like it happens with stars/planets/everything else in space? I have an image in my mind of these objects sort of bunching together around the densest of them, in a similar way to how planets were initially formed from particles and other bodies of rock/ice etc. TL;DR: Do objects with mass create gravity regardless of their size? Would a bowling ball attract marbles in a vacuum as a result of its own (minuscule) gravity? [link] [comments]  |
| [Physics] Why isn't Lithium used instead of Uranium in fission reactors? Posted: 19 Jul 2016 06:19 AM PDT I was looking at the binding energy curve per nucleon the other day on a whim and noticed that it seemed like not only was the binding energy for Lithium was lower than Uranium, but its release of energy would be higher than Uranium (eyeballing a ∆E~1.7 MeV for Lithium vs ∆E~1 MeV for Uranium using the graph on this page for reference: https://en.wikipedia.org/wiki/Nuclear_binding_energy). That being said, why is it Uranium was chosen over something like Lithium, which I'm guessing is probably more abundant as well. [link] [comments]  |
| A few math questions based off Fermat's last theorem? Posted: 18 Jul 2016 04:00 PM PDT Hi Askscience, I was watching a documentary on Fermat's Theorem and it stated that it has been shown that:
an=bn+cn
has no solution where n is greater than 2. However, by doing a little guess and check I found that by adding a 3rd base term that the equation becomes solvable for n=3 or in generic terms:
an=bn+cn+dn
with the simplest solution being:
63=53+43+33
My question is this also solvable for n=4? If not does adding another term alleviate this problem? And then if that's true does the number of base terms needed to solve the equation for exponent (n) equal to the n you are looking for e.g. n=4 means you need 4 terms on the right hand side. Is there any use for this in mathematics? Thanks! [link] [comments]  |
| Why does the digital root of every multiple of *n*-1 equal *n*-1 when working in base *n*? Posted: 19 Jul 2016 01:11 AM PDT |
| [Physics] How was it discovered that crystals have a lattice formation? Posted: 18 Jul 2016 02:22 PM PDT |
| How and why does temperature affect the resistivity of metal wires? Posted: 18 Jul 2016 09:09 PM PDT |
| Does such an element, which would go from gaseous state to solid as the temperature rises, exist? Posted: 19 Jul 2016 02:33 AM PDT I am wondering whether there is an element in the periodic table which would go in reverse through the three stages of matter, gas to solid, as the temperature rises? [link] [comments]  |
| What conditions optimize cardiovascular recovery? Posted: 18 Jul 2016 08:20 AM PDT Biologically/scientifically speaking, what can one do to create the optimal conditions for cardiovascular recovery after years of bad habits, smoking, and sedentary activity (e.g. supplements like CoQ10 and L-Carnitine, dietary changes, etc.) to supplement the obvious increase in activity and smoking cessation? [link] [comments]  |
| What is the maximum limit for massive solid planets? Posted: 18 Jul 2016 08:34 PM PDT So for those who don't know, massive solid planets are possible: https://en.wikipedia.org/wiki/Exoplanet#Massive_solid_planets Since Gas planets turn into Brown dwarfs at 13 Jupiter masses, do massive solid planets (or Rock Giants) that lack hydrogen envelopes not turn into Brown dwarfs? Or do they become a strange boiling super massive ball? [link] [comments]  |
| Why do enantiomers rotate light? Posted: 18 Jul 2016 11:40 PM PDT What about the mirrored structure allows them to rotate light in equal but opposite degrees? [link] [comments]  |
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