What happened with Zika, is it gone now? |
- What happened with Zika, is it gone now?
- How was the newly found huge Japanese "rare earths" deposit formed?
- In the ISS, how do astronomers keep the station clean?
- How does a viscous disinfectant hand gel become more liquid when rubbing it?
- Why are many Midwest US farms harvested/grown in circular patterns?
- If I donate blood, will my blood pressure lower?
- Why did NASA send Rovers (spirit, curiosity, Opportunity) to Mars but destroy Cassini?
- How does a CFC (e.g. CCl2F2), a heavier than air gas, reach the stratosphere, over 20 miles above sea level?
- What can cause bears to not make it through hibernation?
- Are Cerenkov radiation and Landau damping related?
- People generally have the same joints in their bodies with size being the main difference between individuals. Besides injury and medical conditions, what else causes people to have different gaits when they walk or run?
- How do you perform an eye test on a baby or toddler when they can't communicate verbally?
- Does reading/learning to read sheet music activate the same regions of the brains as reading/learning to read a foreign language ?
- How can we be so sure that species of theropods like Yutyrannus were feathered, but have a hard time finding out if others like the T.Rex were fully covered with feathers or were only feathered in certain regions?
- How did we discover plasma? (The 4th State of Matter)
- Why is space equipment/satellites/rocketry assembled and kept in clean room environments?
- How do other baryons behave inside atomic nuclei?
- What is it about the digestive system of animals that makes them able to raw meat, whereas it would make a human sick?
- Are there any methods of recording uncertainties without observing them?
- Why is neutron degeneracy pressure "stronger" than electron degeneracy pressure?
- How can we use The Doppler Effect to calculate the exact trajectory and speed of an object?
- How fast do radioactive things boil water?
| What happened with Zika, is it gone now? Posted: 17 Apr 2018 05:24 AM PDT |
| How was the newly found huge Japanese "rare earths" deposit formed? Posted: 16 Apr 2018 01:47 PM PDT So the higher elements are formed inside Super Novae and then spewed out into the galaxy where they mix with other clouds of matter that eventually became our solar system and planet. So they have been around for billions of years before and billions of years since becoming part of the Earth. But why are they so dense in just this one area and why are they in the form of mud? Also, how likely is it that there are many more of these yet to be discovered? [link] [comments]  |
| In the ISS, how do astronomers keep the station clean? Posted: 17 Apr 2018 04:25 AM PDT Dust (food, human dead cells...) stay in there. Do they "hoover" the environment? Which technologies do they have to do it? [link] [comments]  |
| How does a viscous disinfectant hand gel become more liquid when rubbing it? Posted: 17 Apr 2018 04:16 AM PDT Even when I merely apply some on my hand and not rub it, it will become more runny on the surface of my palm. I guess it has something to do with the alcohol? Can someone explain? Thanks! [link] [comments]  |
| Why are many Midwest US farms harvested/grown in circular patterns? Posted: 16 Apr 2018 11:28 PM PDT Maybe this gravitates more towards agriculture, but I believe r/askscience can justify an answer. In scanning Google Maps in regions of Kansas, Nebraska, and other parts of the United States Midwest, I'm wondering where large regions of land are being farmed/harvested in (nearly) perfect circular patterns? Is there an agricultural benefit to doing so? [link] [comments]  |
| If I donate blood, will my blood pressure lower? Posted: 16 Apr 2018 10:21 PM PDT Will it lower significantly? How long would the pressure be abnormal? [link] [comments]  |
| Why did NASA send Rovers (spirit, curiosity, Opportunity) to Mars but destroy Cassini? Posted: 16 Apr 2018 11:05 PM PDT To the best of my little knowledge about planetary science, we crashed Cassini into Saturn's atmosphere; so that Enceladus, Titan would be unadulterated by any microbes because there is a slight chance they might be habitable for future generations. If so, why then did we land rovers on Mars as they may have carried microbes to Martian surface? [link] [comments]  |
| Posted: 17 Apr 2018 03:46 AM PDT |
| What can cause bears to not make it through hibernation? Posted: 17 Apr 2018 07:20 AM PDT Are there thresholds for how much body fat they need to have gained by the end of the summer? Do we know of sets of circumstances that can lead to them not making it through the winter? [link] [comments]  |
| Are Cerenkov radiation and Landau damping related? Posted: 16 Apr 2018 10:56 PM PDT I was told recently that wave-particle resonances for waves travelling at the frequency of the particle's parallel velocity were Landau or Cerenkov resonant since the particle effectively feels a wave of zero frequency. Perhaps I am simply missing something very obvious, but why does this condition correspond to both Landau and Cerenkov resonance? One is simply wave damping (or growth) on particles with thermal speeds corresponding to the wave's phase velocity, while the other denotes radiation emitted from a medium where the particle's motion exceeds the local speed of light. What's the commonality with the above wave-particle resonance? [link] [comments]  |
| Posted: 16 Apr 2018 03:43 PM PDT |
| How do you perform an eye test on a baby or toddler when they can't communicate verbally? Posted: 16 Apr 2018 09:35 AM PDT |
| Posted: 16 Apr 2018 03:44 PM PDT |
| Posted: 16 Apr 2018 05:29 PM PDT |
| How did we discover plasma? (The 4th State of Matter) Posted: 16 Apr 2018 02:11 PM PDT How exactly did we discover plasma? Have we ever heated gas hot enough to create plasma in a lab environment? Does plasma have an adverse effects upon the human body when exposed? [link] [comments]  |
| Why is space equipment/satellites/rocketry assembled and kept in clean room environments? Posted: 16 Apr 2018 05:46 PM PDT |
| How do other baryons behave inside atomic nuclei? Posted: 16 Apr 2018 10:43 PM PDT Neutrons decay in free space, but are apparently stable inside some atomic nuclei. In other nuclei protons decay. Are there theories or experiments describing how the stability of other baryons are affected? I've found quite a few interesting papers on hypernuclei which I am working through, but very little more easily digested material. Also the papers I have read so far have all discussed the properties of the nucleus itself, mostly binding energy, but not the affects on the constituent baryons. It seems to me that if the half-life of neutrons can be increased by 1020 times, then a lambda baryon which usually decays in under a nanosecond might last for a more human scale timeframe, seconds or years, or even be effectively stable. I also see that the additional binding energy in light nuclei when a hyperon is added is up to around a tenth the mass of the strange quark, which suggests to me that it will be energetically favourable for the strange quark to decay even if the entire nucleus is then left unstable, but is near enough in scale I would expect some change to the decay. Has there been research on heavier hypernuclei, like iron or lead? Thanks. [link] [comments]  |
| Posted: 16 Apr 2018 01:42 PM PDT I feel like all other carnivores have the ability to eat raw meat, but humans do not. Do they have some part of their metabolism that allows this? Or would humans be able to do it as well if we took time to slowly eat more and more raw meat? Additionally, I've heard theories that cooking food is part of why humans are more intelligent than other creatures. Our bodies don't have to use the extra energy to break down the already cooked food, so it goes into our cognitive processes instead. Feel free to expand on that too. Thanks for the insight! [link] [comments]  |
| Are there any methods of recording uncertainties without observing them? Posted: 16 Apr 2018 04:27 PM PDT Quantum Mechanics has many particles and functions which are in a state of uncertainty until they are observed, where they collapse into a single state. My question is, are there any methods, theoretical or real, to record such things for future observation? For example, is it possible to freeze a quantum state in time so that it may be observed later on, and the data recorded? And as a further question, in quantum mechanics, what exactly counts as observation? Is it only human observation, or can it also be animal observation? What about mechanical? And does changing the observer create a difference in the observed state? [link] [comments]  |
| Why is neutron degeneracy pressure "stronger" than electron degeneracy pressure? Posted: 16 Apr 2018 10:29 AM PDT A white dwarf collapses into a neutron star when its mass overwhelms electron degeneracy pressure, and its mass gets compressed into neutrons. A neutron star collapses into a black hole when its mass overwhelms neutron degeneracy pressure, and its mass gets compressed into (???). But the neutron star collapse clearly happens at a higher mass than a white dwarf collapse. This would seem to imply that neutron degeneracy can support greater pressure than electron degeneracy. Why is that, given that they are both (in my understanding) governed by the same Pauli exclusion principle? [link] [comments]  |
| How can we use The Doppler Effect to calculate the exact trajectory and speed of an object? Posted: 16 Apr 2018 05:33 PM PDT Ok, so I understand the basics of The Doppler Effect: when an object is travelling towards you, it compresses and shortens the perceived wavelength of light/sound emitted. When it is travelling away, it increases the perceived wavelength. The thing that I don't understand is how we can calculate an objects exact trajectory. For example, if an object is going in a direction perpendicular to the distant between you and the object, no matter how fast it is going, there would be no Doppler Shift, since said object isn't moving towards or away from you. Am I mistaken in that the Doppler Effect can only determine movement in one axis? Or is there some other way to detect the object's movement? [link] [comments]  |
| How fast do radioactive things boil water? Posted: 16 Apr 2018 03:10 PM PDT I read somewhere that nuclear power was just using nuclear things to boil water and using the steam to spin a turbine. [link] [comments]  |
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