What scale of nuclear warfare would it take to actually result in global nuclear fallout? |
- What scale of nuclear warfare would it take to actually result in global nuclear fallout?
- Do moons of gas giants significantly affect the magnetic field of that planet?
- To how small a part of Africa can we narrow down the evolution of modern humans?
- Is it possible for a planet to have only ONE polar ice cap?
- When does laminar flow become turbulent?
- Are all trees with the same leaf arrangement - alternate, opposite, pinnately compound, etc. - more closely related?
- Why is the Arctic warming significantly faster than the global average?
- I saw that the US goverment classifes an area as "substanial covid risk" if the number of cases are 50+ per 100k people which is at least 0.05% of the population. How do scientists identify risk levels for viruses?
- Is there data yet that shows the effects of omicron in the vaccinated vs the unvaccinated?
- What are the limitations on the interactions between human neurons and electronic connections for prosthesis?
- How does erosion work in the oceans?
- Why can we only measure one component of electron spin at a time?
- If the Grand Canyon River was blocked/dammed would it fill up over time?
| What scale of nuclear warfare would it take to actually result in global nuclear fallout? Posted: 21 Dec 2021 10:08 AM PST Flair may not be perfect, I went with physics because nuclear fission & fusion are collectively referred to as "nuclear physics". There have been at least 2000 nuclear test explosions worldwide to date, spread throughout the northern hemisphere across many longitudes. The perception of the consequences of nuclear warfare seems to be (from an anecdotal perspective) that the sheer volume of weapons detonated in a total war scenario would result in a global nuclear fallout, or "nuclear winter" (whatever that means). Is that perception incorrect? Would a theoretical nuclear war simply render major population centers uninhabitable while leaving the rest of the world unscarred? Are the effects of nuclear detonations more apparent when performed during a short period, and if so, were there any noticeable effects during and after 1962, when ~140 tests took place in a single year? How many detonations would have to take place between the nuclear powers for the effects to be felt in, say, rural Argentina? [link] [comments] |
| Do moons of gas giants significantly affect the magnetic field of that planet? Posted: 21 Dec 2021 10:09 AM PST A magnetic field of a exoplanet was recently discovered for the first time. Could perturbations in a gas giants magnetic field be a potential method for discovering exomoons? [link] [comments] |
| To how small a part of Africa can we narrow down the evolution of modern humans? Posted: 21 Dec 2021 09:42 AM PST Considering the Out-of-Africa model, do we believe that Homo Sapiens evolved out of Homo Erectus over the African continent as a whole, or did we 'become' modern humans in a smaller region (say for example Morocco, where the oldest Sapiens fossil so far was found) and then spread over Africa? [link] [comments] |
| Is it possible for a planet to have only ONE polar ice cap? Posted: 21 Dec 2021 11:14 AM PST Does it depend on how far the planet is from the star & the planet's tilt on the axis & other factors? Or is it only possible for the planet to have two ice caps? I'm doing this for worldbuilding, & the ice cap is at the southern part of the planet. [link] [comments] |
| When does laminar flow become turbulent? Posted: 21 Dec 2021 07:09 AM PST I want to know about laminar flow, specifically about the effects of when the flow accelerates. If I were to take a 500 ft tube which was vertically placed, transparent, and air tight then aim a laminar flow directly down into it, where and when would the turbulence start? Or maybe it would never become turbulent? With water though, I would think that eventually as the water flows down and increasingly narrows, the force from water pressure would collapse the water into droplets, but where and when? Have similar experiments already been done? Do we have a good way of predicting this? [link] [comments] |
| Posted: 21 Dec 2021 09:16 AM PST Is it a case of concurrent evolution or are, say, walnuts and ash trees (both pinnately compound, drastically different fruits) closer phylogenetically than oak and maple (alternate and opposite respectively)? [link] [comments] |
| Why is the Arctic warming significantly faster than the global average? Posted: 21 Dec 2021 10:25 AM PST Multiple studies and reports have shown that the Arctic is warming much faster than the rest of the planet. Why is this occurring? [link] [comments] |
| Posted: 21 Dec 2021 10:00 AM PST |
| Is there data yet that shows the effects of omicron in the vaccinated vs the unvaccinated? Posted: 21 Dec 2021 09:25 AM PST |
| Posted: 21 Dec 2021 07:41 AM PST So, I was asking around in some websites why we don't see many kind of circuits connected to human neurons, and, besides not receiving a lot of replies, a few people said that "the neurons connected to electronics eventually die out, making it unfeasible". For context, I was asking because I saw this video of a scientist using rat neurons to control a robot: "Robot controlled by Neurons": And this one, about prosthesis controlled mentally: "The Robot-Arm Prosthetic Controlled by Thought": I couldn't find much information about it, but it is true that the neurons die out or are killed by the circuits directly connected to them? [link] [comments] |
| How does erosion work in the oceans? Posted: 21 Dec 2021 08:36 AM PST Im not sure if erosion is the term that applies, but if not I imagine there has to be a similar force at work. [link] [comments] |
| Why can we only measure one component of electron spin at a time? Posted: 21 Dec 2021 10:53 AM PST Why can we not measure the x/y/z component in a single detector? Is it theoretically impossible or practically not possible? [link] [comments] |
| If the Grand Canyon River was blocked/dammed would it fill up over time? Posted: 20 Dec 2021 08:44 PM PST If at some point along the Grand Canyon a catastrophic landslide or dam was built, would it fill up behind the blockage until it overflowed? Due to the unique nature of the deep Canyon the water has no way to divert like flooding upriver. But for miles but has a vast basin that it could fill overtime, is this possible? [link] [comments] |
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