Is it in any way possible to reverse a black hole? |
- Is it in any way possible to reverse a black hole?
- How do I use a fair 6-sided die to generate a random number from 1 to 100, with each outcome occurring with the same probability?
- Does reflection actually happen only at the surface of a material or is there some penetration depth from which light can still scatter back?
- Are the insect specimen's trapped inside amber hard or soft?
- Differentiating Magnetic Potential to get Magnetic Field?
- How much progress has been made in identifying the "missing" carbon sink in the last few years?
- Little Boy v Fat Man: why were different cores used?
- How do you find the radius of an atomic nucleus?
- Why the does relative stiffnesses of the members of a frame affect the shape of the moment diagrams?
- How do Scientists know how fossils are related?
- How can ions with a negative charge of 2 or more exist?
- Why don't dimensionless elementary particles emit Hawking radiation?
- What lasting implications could Trump's boarder wall have on the ecosystems on the US/Mexico boarder?
- Relationship between two properties of energy?
- Can charge be represented in terms of mass, length, and/or time?
- In 2011 Michio Kaku's Physics of the Future talked about Laser Isotope Separation for enriched uranium and the lower bar to nuclear weapons this afforded to developing nations. Is it any closer to fruition half a decade later?
- Why is there no electric field within a conductor?
- Is there any correlation between how quickly eyesight deteriorates as humans age and how soon they die?
- When Siri transmits speech from a phone to a data center for speech recognition, is that speech encoded the same as a mobile phone call, or is it encoded in higher fidelity?
- What if there was more anti matter than matter after the Big Bang? Would we be living in a similar world made of anti matter? Or would there be nothing
- If you pour equal amounts of hot and cold water in a container, would the resulting mixture be the exact median of the two temperatures?
- Can an autopsy of a fetus differentiate between a medically induced abortion and a miscarriage?
| Is it in any way possible to reverse a black hole? Posted: 26 Jan 2017 10:04 AM PST Would it be possible to remove mass from a black hole, making the gravititional pull too weak to "maintain" a singulariry? What would happen? [link] [comments]  |
| Posted: 26 Jan 2017 12:08 PM PST |
| Posted: 26 Jan 2017 01:56 PM PST Hi, say an air/silicon interface is irradiated with a laser. Some light is transmitted, some is reflected. Is the reflection only happening from the first row of atoms? Or is there some penetration depth from which the light can still find its way back? And if the latter is the case, how big is it? And does it still preserve the same angle as the light that is scattered back from the first row of atoms? What's going on exactly? (PhD student asking) Thanks! [link] [comments]  |
| Are the insect specimen's trapped inside amber hard or soft? Posted: 26 Jan 2017 05:26 AM PST I'm just wondering if the items trapped in amber get mineralized too. [link] [comments]  |
| Differentiating Magnetic Potential to get Magnetic Field? Posted: 27 Jan 2017 04:09 AM PST Hi all! I am trying to find the magnetic field of the earth. I found a doc with the link below, and am reffering to the last slide on page 3. http://rallen.berkeley.edu/eps122/lectures/L05.pdf First off, I am confused with what magnetic potential is. I am also confused on the difference between H and B with regards to magnetic forces and flux. Could you help me explain how differentiating the magnetic potential yields a magnetic field. Ie the conceptual understanding behind it. THANKS! [link] [comments]  |
| How much progress has been made in identifying the "missing" carbon sink in the last few years? Posted: 26 Jan 2017 10:48 AM PST I remember from an undergraduate ecology course I took in 2012 that there is an apparent deficit between projected and measured CO₂ levels in the atmosphere and oceans. As I understand it, these projections were based on known and predicted amounts of CO₂ emissions from both anthropogenic and nonanthropogenic means as well as projected and measured rates of sequestration into terrestrial and oceanic carbon sinks, but if I recall correctly the difference between projected and measured values was massive and getting larger by the year (without any adjustment to the models). I mean, I assume it's not just one thing. Speculating as a grad student in biochemistry (and probably over-simplifying), I wonder if it's not a Le Chatelier-like effect shifting the rate of biotic and abiotic sequestration reactions as the concentration of free CO₂/HCO₃⁻ goes up (or, alternately, an allosteric mechanism), but I assume people who specialize in that field have made efforts to account for that already. I also remember that the Duke Forest experiment showed higher rates of carbon sequestration in a high CO₂ environment but that the soil may have been approaching limiting nitrogen conditions before the experiment was terminated. I shouldn't need to say this, but on the off-chance this makes it to /r/all, I'm not a climate change denier. I'm just interested in how far a field outside my expertise has come in improving its models, projections and measurements (and no, this isn't homework). [link] [comments]  |
| Little Boy v Fat Man: why were different cores used? Posted: 26 Jan 2017 02:36 PM PST LB was a uranium bomb and FM was a plutonium bomb. Why wasn't the same design used for both drops? [link] [comments]  |
| How do you find the radius of an atomic nucleus? Posted: 26 Jan 2017 11:30 PM PST |
| Why the does relative stiffnesses of the members of a frame affect the shape of the moment diagrams? Posted: 26 Jan 2017 08:19 PM PST Or, why does relative stiffness affect the moments in statically indeterminate structures but not statically determinant ones? [link] [comments]  |
| How do Scientists know how fossils are related? Posted: 26 Jan 2017 03:01 PM PST Hello, Ok so I go to a Christian school (i'm not here to debate God). I am an Evolutionary Creationist, and my friend is a young earth creationist. He told me scientists don't know even if the fossils are related (I showed him a picture of the evolution of a whale). So besides the looks of the fossils, how else do they know if they are related? https://evolvingplanet.files.wordpress.com/2014/05/whaleevolution-kmonoyios.gif [link] [comments]  |
| How can ions with a negative charge of 2 or more exist? Posted: 27 Jan 2017 06:27 AM PST I would assume that any given electron would just get repelled from the nucleus/molecule, even into a vacuum of space as a free electron. What makes the electron overcome the repulsive electro magnetic force, and allow such ions to be stable for longer than an instant? [link] [comments]  |
| Why don't dimensionless elementary particles emit Hawking radiation? Posted: 27 Jan 2017 04:51 AM PST They do have a Schwarzschild radius larger than the Planck length, and their size is technically under that radius. [link] [comments]  |
| Posted: 26 Jan 2017 02:44 PM PST |
| Relationship between two properties of energy? Posted: 27 Jan 2017 03:39 AM PST So energy is the conserved quantity you get from continuous time-translation symmetry. Minimizing it is also the condition for a state being stable. Is there some relationship between these, or is it purely a coincidence that they happen to be the same quantity? [link] [comments]  |
| Can charge be represented in terms of mass, length, and/or time? Posted: 26 Jan 2017 05:36 PM PST My professor said all quantities/measurements can be expressed in units of mass, length, and/or time. In SI units, then everything can be denoted by a particular combination of kilograms, metres, and seconds. But I am wondering how one can express charge (e.g. 1 Coulomb) in terms of these 3 "fundamental" units. As far as I can tell based on basic dimensional analysis, it is not possible. The only other trivial conversion is to say 1 C = 1 A x 1 s, but this does not exactly back up my professor's claim. Thus I was wondering if perhaps I misinterpreted my professor or if charge can really be expressed in the above 3 units. [link] [comments]  |
| Posted: 26 Jan 2017 04:03 PM PST |
| Why is there no electric field within a conductor? Posted: 26 Jan 2017 11:55 AM PST |
| Posted: 26 Jan 2017 05:21 AM PST Presbyopia (farsightedness due to loss of elasticity of the lens of the eye) is, from what I know, unavoidable as humans age. Is there any data that shows a correlation between how quickly presbyopia sets in and at what age you die? [link] [comments]  |
| Posted: 26 Jan 2017 11:39 AM PST |
| Posted: 26 Jan 2017 10:07 AM PST |
| Posted: 26 Jan 2017 06:14 AM PST Or would one overpower the other? And can someone explain the reasoning behind it? [link] [comments]  |
| Can an autopsy of a fetus differentiate between a medically induced abortion and a miscarriage? Posted: 26 Jan 2017 09:06 PM PST Having done some research on medically induced abortions, I discovered the that most common first trimester abortions are performed with the assistance of: Mifepristone and Misoprostol. However what I was unable to determine, or see any papers published on, is a first trimester abortion medically differentiable from a miscarriage. I found this on the half life of Mifepristone: elimination of mifepristone is slow at first (50% eliminated between 12 and 72 hours) and then becomes more rapid with a terminal elimination half-life of 18 hours." Source here I assume this means that blood work or something else would be able to detect the presence of the abortion medication in the mother, if blood work is taken within 72ish hours? This question was inspired by a facebook conversation in which there was a claim made that this was possible. [link] [comments]  |
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