- On tv a while ago, Brian Greene said that we may see gravity as the weakest force because it may only exist partly in our universe and partly in another. Is this considered a credible theory today? If so, would the gravity waves we've observed be traveling through those other universes as well?
- Is there any actual evidence that multiple dimensions and universes exist?
- Is it possible for liquids to be physically damaged?
- Why can't normal batteries be recharged?
- If you could strike one side of an atom is there a propagation delay before the far end of the atom knows to start moving? Do they deform in some way...i.e. as a tennis ball when it is struck?
- What does it mean to "be Bayesian" in terms of a way of thinking?
- Y-chromosome DNA can be used to trace male ancestry. Mitochondrial DNA can be used to trace female ancestry. Do we have enough information from each to make any useful statement about whether Neanderthal DNA in modern humans is mostly from male or female ancestors, or from both equally?
- Biochemically, why does the methyl group of meth cause it to be so much potent than other amphetamines?
- What exactly about the Higgs Boson or the Higgs field gives matter mass?
- How long it took for Charon to freeze completely?
- How does hyperparathyroidism and hypercalcemia cause hypomagnesemia?
- I've heard that GPS satellites have to compensate for relativity to stay accurate. What specifically do they have to compensate for?
- At what point in evolution did mammals gain the ability to synthesize vitamin D from sunlight?
- If we accept that gravitation is an effect of distortions in spacetime, why do we still try to unify gravity with the other forces?
- Where did early organisms get their energy if there were no other organisms to digest and no photosynthesis?
- Why do we have separate systems for myelination of the central and peripheral nervous systems?
- Does electromagnetism distort space time like gravity?
- How is mass converted to the energy of gravitational waves?
- How many integrated circuits are in a computer?
- Doppler Effect, where does the energy go ?
- What is the scientific consensus on the effect of vegetarian and vegan diets on health?
| Posted: 20 Feb 2016 05:27 PM PST He was comparing gravity to the strong & weak nuclear forces, and electromagnetism. [link] [comments]  |
| Is there any actual evidence that multiple dimensions and universes exist? Posted: 20 Feb 2016 04:50 PM PST |
| Is it possible for liquids to be physically damaged? Posted: 20 Feb 2016 11:12 AM PST I'm going to use an example. If by chance I have a quart of synthetic motor oil and drop it from a very high building in its container(the container doesn't break) will the oil still be in perfect condition or would it be damaged and not reccomended for use. Other than my example, any other ways certain liquids could succumb to physical damage? [link] [comments]  |
| Why can't normal batteries be recharged? Posted: 20 Feb 2016 06:31 PM PST |
| Posted: 20 Feb 2016 09:43 AM PST I'm trying to understand the "pushing a steel rod" example, that if you push a steel rod there is a propagation delay before the other end knows to move. The example always seems to be that the information in the wave propagates atom-to-atom along the rod compressing the distance between the atoms, but does the wave deform the atom itself as it passes along in some way? I get that nothing is instantaneous and the information needs to move through the atom in some way, but I've never heard if/how the atom itself changes, or if the particles in the nucleus or the electron shells actually deform in some way like a tennis ball in response to the propagating wave. [link] [comments]  |
| What does it mean to "be Bayesian" in terms of a way of thinking? Posted: 20 Feb 2016 10:03 AM PST I'm familiar with Bayes' Theorem and how it's used in problems, but I've heard people talking about having a Bayesian way of thinking in general, or statisticians subscribing to a Bayesian way of thinking. What exactly does this mean? Is there more to Bayesian reasoning than just solving probabilities? [link] [comments]  |
| Posted: 20 Feb 2016 08:59 AM PST In other words, can we determine whether male Neanderthals were more commonly breeding with contemporary female H. Sapiens in a way that contributed to current human DNA, or vice versa? Or can we see that both combinations have left a broadly equivalent trace? Or do we simply not have enough information (so far)? [link] [comments]  |
| Posted: 20 Feb 2016 01:47 PM PST |
| What exactly about the Higgs Boson or the Higgs field gives matter mass? Posted: 20 Feb 2016 09:10 AM PST |
| How long it took for Charon to freeze completely? Posted: 20 Feb 2016 11:09 AM PST There was news recently that Charon may have had a liquid ocean under ice crust. The speculation was based on cracks on Charon's ice crust. So I wonder how long time Charon could have had the liquid ocean or part of it? [link] [comments]  |
| How does hyperparathyroidism and hypercalcemia cause hypomagnesemia? Posted: 20 Feb 2016 07:02 PM PST How does hyperparathyroidism and hypercalcemia cause hypomagnesemia? I know it's pretty far-fetched, but I've tried google but to no avail. Yes, I've read my books, but I couldn't wrap my head around the concept. Answers are really appreciated. Thank you! [link] [comments]  |
| Posted: 20 Feb 2016 07:08 AM PST Is the difference in time due to them being farther from our gravity well or does it have to do with the speed that they are moving? Or is there something else? [link] [comments]  |
| At what point in evolution did mammals gain the ability to synthesize vitamin D from sunlight? Posted: 20 Feb 2016 11:42 AM PST |
| Posted: 21 Feb 2016 12:48 AM PST Doesn't the warped spacetime idea mean that two masses "accelerating" toward each other due to gravity are, in fact, not accelerating at all but each just following their respective path in spacetime? It seems to me that since the objects aren't directly interacting with each other that this makes gravity fundamentally different from the others, no? [link] [comments]  |
| Posted: 20 Feb 2016 11:09 AM PST In a closed system, life couldn't exist on earth because there would be no energy input. However, with the sun giving off energy, it's possible. Animals eat other animals which ate plants which used photosynthesis to get energy from the sun. But what happened before photosynthesis evolved? For even a single celled organism to divide, it needs energy. Absorbing another organism might make sense, but that organism would have needed to find energy as well. Aren't even nutrients full of potential chemical energy that had to come from somewhere? [link] [comments]  |
| Why do we have separate systems for myelination of the central and peripheral nervous systems? Posted: 20 Feb 2016 12:42 PM PST I assume it has a reason due to evolution, but all I can find with google are differences between oligodendrocytes and schwann cells. I can't find anything about why they are separate systems. Thanks! [link] [comments]  |
| Does electromagnetism distort space time like gravity? Posted: 21 Feb 2016 12:01 AM PST |
| How is mass converted to the energy of gravitational waves? Posted: 20 Feb 2016 10:19 AM PST In the recently detected waves, three solar masses worth of black hole ... stuff ... was converted into gravitational waves. But any two masses orbiting each other produce waves, even if they're undetectable. Those waves are carrying energy, which apparently comes from a reduction of mass in the system. How does that work? I'll pick an example: the earth-moon system is radiating gravitational waves at a frequency of about 4 x 10-7 hertz at some teeny tiny eentsy beentsy wattage. Is the ordinary, non-black-hole-matter mass of the system shrinking by that same wattage? How? [link] [comments]  |
| How many integrated circuits are in a computer? Posted: 20 Feb 2016 05:09 PM PST I'm looking for real or approximate numbers in any real-world devices. Yes, I know it depends on the computer. What is the complexity scale of what we're dealing with? Are there 10 integrated circuits in a computer? 10,000? Impossible to quantify because they overlap somehow? I have no idea and extensive searches on Google aren't helping me. [link] [comments]  |
| Doppler Effect, where does the energy go ? Posted: 20 Feb 2016 04:30 PM PST Hi, I have some questions about the doppler effect and was wondering someone could help me understand. With the phenomenon called the doppler effect, the frequentie of for example an electromagnetic wave (such as a lightbeam) will change due to the movement of the emitter or it being bounced of of a moving object. Now the famous formula of Max Planck tells us the energy an electromagnetic wave equals the planck constant times the frequentie of the wave. Now my question is, where does this energy, due to the change in frequentie, go ? [link] [comments]  |
| What is the scientific consensus on the effect of vegetarian and vegan diets on health? Posted: 20 Feb 2016 07:00 AM PST I've yet to find a comprehensive/peer reviewed meta analysis of vegetarian or vegan diets. Opinions tend to be 'it's good for you' or 'it's bad for you'. I'd like to see or hear some actual science! [link] [comments]  |
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