If I went back to the Cretacious era to go fishing, what would I catch? How big would they be? What eon would be most interesting to fish in? |
- If I went back to the Cretacious era to go fishing, what would I catch? How big would they be? What eon would be most interesting to fish in?
- Is there a way to calculate how fast a fluid will drip through an opening?
- If the earth's atmosphere was compressed into a liquid, how would it compare in volume to the oceans?
- Why do globular clusters typically orbit outside of the plane of the galaxy?
- Can a larger magnet shift the polarity of a smaller magnet if held next to it for long enough?
- Why haven't the Trojan asteroids coalesced?
- Is understanding of numbers and magnitude when dealing with several objects universal for all humans? Do we have an innate ability to understand arithmetics?
- Is their any link between Myers-Briggs Types and political affiliation?
- Can a particle be entangled to two other particles?
- [Physics] I have a couple of questions about gravitational waves?
- Why do so few metals, such as gold and copper, have unique colors?
- What about the electromagnetic field makes electromagnetism so much more exploitable than the other three fundamental forces?
- How is the right amino acid brought to ribosomes?
- How is food distributed in an ant colony?
- What are the empirical differences between men and women?
- String theory says there are extra dimensions, too tiny to detect. Will the accelerating expansion of the universe eventually inflate these dimensions to be big enough to affect anything perceptibly?
- What's the point in creating new elements? Would anything further in the periodic table be stable?
- How/why do gravity waves traveling at the speed of light escape the gravitational pull of a black hole while other things (example = photons) at that same speed can't escape?
- Does NASA or any other space organisation have satellites orbiting other planets? if not, why not?
- How do bubbles work?
- How do we test for genetic predisposition? How do we test for ANY predisposition?
- When two black holes approach each other they accelerate and gain kinetic energy. Where does this energy come from?
- How to measure and calculate the transmitted and reflected wavefront distortions from a beam splitter?
| Posted: 21 Feb 2016 08:00 PM PST |
| Is there a way to calculate how fast a fluid will drip through an opening? Posted: 21 Feb 2016 09:05 AM PST I want to make a really slow hourglass, more like a yearglass. Googling only gives me results related to medical tubing/IVs and the tar drip experiment. I'm looking for formulas or research on how to realistically calculate or simulate how fast a liquid will drip or flow through air due to gravity, given factors like viscosity, aperture size, surface tension, etc. Edit: Thank you everyone for all of the very helpful replies and references. After a bit of research and testing I decided that viscosity changes due to temperature swings will be too big of a factor to go with a purely gravity-powered hourglass setup. Instead I'm now revising the design to try it with an actuator delivering very small amounts of liquid into the bottom container on a very slow time scale. I think I might be able to still make it self-contained without needing to be plugged in. [link] [comments]  |
| Posted: 21 Feb 2016 10:15 AM PST |
| Why do globular clusters typically orbit outside of the plane of the galaxy? Posted: 21 Feb 2016 07:29 PM PST Unlike the majority of galactic objects - young, open clusters, for example - globular clusters tend to orbit outside of the galactic plane. My initial guess is because they weren't part of the initial formation of the galaxy itself. Is this true? If so, are these the bones of ancient mini-galaxies, nebula, something else, that the Milky Way subsequently captured? Are these objects as old or older than our own Milky Way? Is it fair to assume globular clusters are, in a sense, an older generation of open clusters? [link] [comments]  |
| Can a larger magnet shift the polarity of a smaller magnet if held next to it for long enough? Posted: 21 Feb 2016 04:56 PM PST |
| Why haven't the Trojan asteroids coalesced? Posted: 21 Feb 2016 09:26 AM PST From what I understand of Legrangian points, the L4 and L5 positions are gravitationally almost flat (although they are still maxima in the potential field). Given the weak destabilizing vectors in this area and the overall mass of the Trojans, why hasn't the mutual gravity of the Trojan's pulled them into larger Is it that the L4/L5s are still technically at gravitational peaks and thus the instability, while slight, is still stronger than the mutual attraction of the Trojans? Am I missing something here? edited for clarity [link] [comments]  |
| Posted: 21 Feb 2016 04:47 PM PST I work part time in a kindergarten doing some very basic teaching of numbers and simple math. While teaching I was noticing how simple number tasks (addition, subtraction) is very intuitive and easy to graspe for almost all the kids, while more complex tasks, like fractions and multiplication, often takes way more effort when learned for the first time. I am interested in if there is evidence of arithmetic abilities in infants that explain why these simple tasks seem to be executed without somone needing to teach them much. Or if there is examples of cultures that does not utilise the concept of numbers at all. Sources and references is very much welcomed, thank you in advance! (PS. I apologize if my English is lacking, i use it way too rare.) [link] [comments]  |
| Is their any link between Myers-Briggs Types and political affiliation? Posted: 21 Feb 2016 04:20 PM PST Pretty self-explanatory. Are certain type indicators correlated with particular political views? [link] [comments]  |
| Can a particle be entangled to two other particles? Posted: 21 Feb 2016 09:50 AM PST For example, if A can be entangled to B which is already entangled to C. Second question, if the answer is yes: given the spin of A, can we know the spin of C? [link] [comments]  |
| [Physics] I have a couple of questions about gravitational waves? Posted: 21 Feb 2016 06:21 PM PST Idk if this is the right sub for this and I'd previously posted on the megathread a week or so ago but here goes: I was reading an article on the NY Times app, and at the end of it it says "only three days before the black hole chirp...antenna readings were plagued by radio interference." and earlier was mentioned how a group known as Bicep "claimed to have detected gravitational waves...They later acknowledged that their observations had probably been contaminated by interstellar stardust." So could it be possible that LIGO's readings were polluted by radio interference? Also, did VIRGO or any of the other interferometers detect the same as LIGO did? Thank you in advance. [link] [comments]  |
| Why do so few metals, such as gold and copper, have unique colors? Posted: 21 Feb 2016 02:34 PM PST |
| Posted: 21 Feb 2016 08:11 PM PST Humans have been manipulating the electromagnetic field for thousands of years and the effect of our mastery of electromagnetism has had indisputable effects on our cultures and technology. Why are the other forces - gravity and the strong and weak forces - less useful? [link] [comments]  |
| How is the right amino acid brought to ribosomes? Posted: 22 Feb 2016 06:03 AM PST So what I know is that the mRNA is brought to the ribosome with a code for an amino acid. I also know that the tRNA with a matching codon and correct amino acid are brought to the ribosome for assembly. But how is the right amino known? Does the ribosome read the mRNA and call for a tRNA or do the tRNA keep trying to fit the codon in the ribosome till it fits then goes and brings the amino acid. Thanks i have a test on this is a couple of hours. [link] [comments]  |
| How is food distributed in an ant colony? Posted: 22 Feb 2016 02:35 AM PST Ants are born to specific roles. Some ants protect the colony. Others scout for food. Still others attend to the queen and feed the brood. Not every ant is assigned to foraging food. When do ants eat and how is the food distributed? Do the collector ants eat as they forage? Do they only regurgitate excess? When do soldier ants or non-foraging ants find the time to go eat? Is the food delivered to them? Do they take a break when they get hungry? [link] [comments]  |
| What are the empirical differences between men and women? Posted: 21 Feb 2016 03:40 PM PST Obviously I'm not talking about physical differences, but differences in cognition or behavior. This is a controversial topic and I've run into so many people that believe men are funnier, smarter, or just generally "better". I vehemently disagree with this but I acknowledge that there must be differences. Are there any good papers or studies examining these differences out there? [link] [comments]  |
| Posted: 21 Feb 2016 12:51 PM PST The article I saw said these dimensions are a billionth of a nanonmeter in size, which is about the scale the strong & weak force work on, so I imagine not much growth would be needed to mess with them. If I remember rightly these tiny dimensions are what make gravity weak so inflating them could even prevent dark energy from tearing all the matter in the universe apart. [link] [comments]  |
| What's the point in creating new elements? Would anything further in the periodic table be stable? Posted: 21 Feb 2016 03:10 PM PST |
| Posted: 21 Feb 2016 06:17 PM PST If gravity waves travel at the speed of light, then how do gravitational waves escape the event horizon of a black hole whereas photons cannot? [link] [comments]  |
| Does NASA or any other space organisation have satellites orbiting other planets? if not, why not? Posted: 21 Feb 2016 03:30 PM PST |
| Posted: 22 Feb 2016 12:33 AM PST Bubbles are a mystery to me. How are they stable (to the point of sometimes being able to poke through them without them collapsing!)? Why doesn't the attractive force between molecules make it impossible for them to form? Why does soap make it easier for bubbles to form? Soap reduces surface tension, so I feel like it should have the opposite effect. Finally, why are bubbles slightly iridescent? [link] [comments]  |
| How do we test for genetic predisposition? How do we test for ANY predisposition? Posted: 21 Feb 2016 02:28 PM PST I'm interested especially in certain mental illnesses, e.g. schizophrenia, schizoaffective disorder or bi-polar disorder. These were all initially identified as having only environmental ('nurture') causes, but have recently been pushed as originating genetically (nature). My question is : how do you test for something that can only happen- or not happen- once to a subject? Are we really just talking about looking at genes that appear abundant among these subjects, and finding correlations? Isn't that correlation, and not causation? Do we ever do any better than that? If anybody has any good hard science (data, studies, or journal articles) to share I'd be interested. Cheers. [link] [comments]  |
| Posted: 22 Feb 2016 03:29 AM PST Due to the laws of conservation of energy, some form of energy must be converted into kinetic energy. Does gravitational energy convert to kinetic energy? [link] [comments]  |
| Posted: 21 Feb 2016 03:41 PM PST Just need the basics and formulas and maybe some material to read about it. Thanks. [link] [comments]  |
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