What causes an ice age, and is it possible for us to have another one/when could the nearest one be? |
- What causes an ice age, and is it possible for us to have another one/when could the nearest one be?
- why is Hilbert space useful in quantum mechanics?
- Is there any standard folding or organisation to the GI tract, specifically the small intestine?
- I have an atom with an excited electron. A mile in every direction are cameras pointing towards the atom. The excited electron drops orbit and one photon is emitted. Who gets the photon on film? Can it register on all the cameras?
- Do humans inherit their voices, or is our voice a "learned" skill?
- Can Deinococcus Radiodurans survive autoclaving?
- How do experiments with high power requirements arrange their supply of electricity?
- Can someone explain quantization of EM field resulting in photos?
- Why is the HPV vaccine given in multiple stages?
- Is "Limit of Detection" a lower bound or can it also be an upper bound?
- What medical conditions would prevent you from working with nuclear radiation? Or going places you might be exposed to radiation?
- What percentage of satellites are used for civilian versus military purposes? (Or both?)
- Are there fishes which swim up-side-down?
- How do Hydrogen Cars work?
- What is the rate of soil development in a grassland vs a forest in the same climate?
- Why is wireless charging so inefficient?
- Why is oxygen crucial to life?
| What causes an ice age, and is it possible for us to have another one/when could the nearest one be? Posted: 06 Oct 2018 07:02 PM PDT |
| why is Hilbert space useful in quantum mechanics? Posted: 07 Oct 2018 06:30 AM PDT I believe I understand the mathematics of Hilbert spaces, but don't understand how their properties are useful for quantum mechanics in a visual sense. What is it about the dot product that applies to, say, probability amplitudes? I'm trying to understand this smbc comic if that's helpful. Sorry if this question is too basic for this sub. [link] [comments]  |
| Is there any standard folding or organisation to the GI tract, specifically the small intestine? Posted: 06 Oct 2018 10:19 PM PDT Does it change as we grow? Does it depend on body size? Is it genetic? [link] [comments]  |
| Posted: 07 Oct 2018 03:01 AM PDT I may have put this terribly, but I want to emit one photon, wave-like in every direction. If photons must have a direction then the question does not work, but opens up the new question of, Why? [link] [comments]  |
| Do humans inherit their voices, or is our voice a "learned" skill? Posted: 06 Oct 2018 09:12 PM PDT I got to thinking about how some people in families sound similar, not accent, but tone, range, etc. Then I wondered if its a genetic component to how the vocal chords and diaphragm develop, or maybe its a learned behavior/skill from listening to adults as kids, and imitating those voices. Thoughts? [link] [comments]  |
| Can Deinococcus Radiodurans survive autoclaving? Posted: 07 Oct 2018 12:34 AM PDT I am wondering if autoclaves are really all that sterile when working with extremophiles. Cannot seem to find any studies online. [link] [comments]  |
| How do experiments with high power requirements arrange their supply of electricity? Posted: 06 Oct 2018 11:28 AM PDT It's well known that experiments such as particle accelerators, fusion tocamacs and lasers require extremely high amounts of energy to run; some for a fraction of a second, some for significantly longer. Do these experiments have their own power stations, as it were? Or do they draw electricity from the national grid of the country their in? If so, how does the grid deal with the momentary spike in demand? Do the experiments have to schedule their demand in advance? [link] [comments]  |
| Can someone explain quantization of EM field resulting in photos? Posted: 06 Oct 2018 10:07 AM PDT From what I understood googling it, I think we need to use expression for TE of EMF [link] [comments]  |
| Why is the HPV vaccine given in multiple stages? Posted: 06 Oct 2018 02:04 PM PDT |
| Is "Limit of Detection" a lower bound or can it also be an upper bound? Posted: 06 Oct 2018 01:45 PM PDT I recieved some data recently dealing with chemical contamination in sediments. When I got the data I was told " HARC_Value is calculated field we created that sets the value to 0 if the Limit of Detection is exceeded during sampling processing " when I asked for a little clarification on this I never recieved a response. The language makes me think the value was high, but if that was the case why would it be set to 0 and reported as such? My previous understanding of detection limit was that it was a lower bound. If anyone could clarify this for me I would really appreciate it. [link] [comments]  |
| Posted: 06 Oct 2018 11:58 AM PDT Like would someone with a very compromised immune system or something like hemophilia be prevented from say working near or touring areas where you might be exposed to radiation. [link] [comments]  |
| What percentage of satellites are used for civilian versus military purposes? (Or both?) Posted: 06 Oct 2018 09:16 AM PDT This is something sparked from another question about the uses of space, but it occurred to me that there might be people out there with guesses about the relative numbers. Many satellites currently in orbit serve what we can probably call unambiguously civilian purposes. Sirius XM radio, for example, is pumping out tunes, not war. Many of the satellites serve unambiguously military purposes, too, doing things like spying, looking for missile launches, coordinating command and control systems, playing roles in missile defense, and so on. And some satellites of course straddle the line: GPS, for example, is heavily used by military systems (and was invented and deployed originally for them exclusively), but is also heavily used by civilian systems these days as well. Is there any kind of census of satellites that would give us a sense of what percentage of them probably fell into these respective categories (civilian, military, dual-use)? I am aware that the boundaries between them are going to be somewhat fuzzy at times, but I'm curious if we have any sense of the relative composition of space. I am just curious — if it was more military, or more civilian, or more dual-use, all of these would be interesting cases. It would REALLY interesting to know (as a historian) if there is a way to track this over time (e.g., my assumption is that it has gotten more civilian and dual-use over time, but that might be wrong for all I know about satellites, which isn't much), but I'm not expecting that to be easily accessible data, but what do I know. [link] [comments]  |
| Are there fishes which swim up-side-down? Posted: 06 Oct 2018 04:56 AM PDT |
| Posted: 06 Oct 2018 05:53 AM PDT How do they use hydrogen to create energy for the engine? [link] [comments]  |
| What is the rate of soil development in a grassland vs a forest in the same climate? Posted: 06 Oct 2018 05:27 AM PDT A thread yesterday talked about how phytoplankton sequesters carbon longer than trees since it often sinks to the bottom of the ocean for thousands of years. I have also seen some research suggesting grasslands may be better carbon sinks than forest since more of their biomass is underground. It got me wondering about the relative rates of soil deposition and google didn't net any clear answers. [link] [comments]  |
| Why is wireless charging so inefficient? Posted: 06 Oct 2018 04:11 AM PDT |
| Why is oxygen crucial to life? Posted: 06 Oct 2018 08:27 AM PDT I read recently that there have been complex organisms found in the black sea, where the water is relatively anoxic, but my question is why isn't the black sea flourishing with life? Could it be possible that earth would have the amount of life we have today without oxygen, and if so, could intelligent life evolve in such an environment? Is oxygen crucial to having complex organisms or are there other chemicals that could support the amount of life that we have on earth today? [link] [comments]  |
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