Can we model stochastic systems as deterministic systems? |
- Can we model stochastic systems as deterministic systems?
- How much time will it take for the CMBR to cool to radiowave frequencies? Won't this have an effect on free electron spins?
- If there was a perfect hole going through the entire Earth, how fast would you travel through it? (No friction, heat, pressure)
- Do bodies/objects still emit radiation at 0 K?
- When someone is in a coma do their bodies still go through their natural circadian rhythm and sleep cycles?
- Is there an age at which most people would not live past, if not for modern medicine?
- What would the night sky look like if we lived on a planet in a star cluster?
- Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science
- If an astronomer with a telescope traveled thousands of years into the future could he or she calculate the current year by only constellation shifts?
- If the universe was homogenous after the Big Bang? What caused the initial stars to form?
- Why do video cameras show horizontal flashes of light right before it captures a lightning bolt striking the ground?
- Why are significant figures so stressed in chemistry, yet unimportant in physics?
- I there a maximum strength for a permanent magnet of a given mass?
- What special geology makes places like the Middle East, Malaysia, Gulf of Mexico so rich in oil?
- Why is cancer most common in reproductive organs that are exclusive to each sex?
- Can a neutron be polarized because of its quark composition?
- Does an audio waveform, such as the type you can see in Audacity, contain absolutely all the information of that piece of audio?
- How do we know that the Andromeda galaxy is moving towards us?
- Why does summer/winter have less temperature variance than spring/autumn?
- When I put my blanket/bed sheets on the sun, why does it "smells like sun" after? What is happening with the fabric?
| Can we model stochastic systems as deterministic systems? Posted: 24 Aug 2016 12:37 AM PDT I was reading a book blurb which advocated using stochastic analysis for climate models. Can the climate be modeled deterministically? Under what conditions will it still give useful results? [link] [comments]  |
| Posted: 23 Aug 2016 09:57 PM PDT If free electron spin is affected by radiowaves, then won't they be affected by what is at some point a cosmic radiowave background radiation? [link] [comments]  |
| Posted: 24 Aug 2016 06:45 AM PDT So, I got into a bit of a debate with some friends at the pub. We were trying to figure out how fast you would travel if there was a perfect hole straight through the Earth, assuming things like pressure and heat didn't kill you and also no friction. One of them suggested that you could simply walk out the other side because you would get faster and faster as you approached the core, then once you were past it would begin slowing down until eventually you reached the same speed you initially entered at and could simply walk out as the effect of the Earth's gravity at the centre became weaker as you move further away again. I wasn't so sure though, it just seemed a bit too perfect but I'd be interested to know the physics behind this. [link] [comments]  |
| Do bodies/objects still emit radiation at 0 K? Posted: 23 Aug 2016 08:06 PM PDT |
| Posted: 23 Aug 2016 06:05 PM PDT And does it matter whether it's a trauma coma or a medically induced coma? [link] [comments]  |
| Is there an age at which most people would not live past, if not for modern medicine? Posted: 23 Aug 2016 12:20 PM PDT As we age, our hair turns grey (or we go bald), our vision gets worse, our hearing deteriorates, our teeth fall out, the likelihood of getting cancer increases, etc. I'm wondering if all of these processes signal that humans have a sort of 'natural' age of death that we live past because of dentists, optometrists, doctors, and other healthcare professionals? In other words, without any medical intervention whatsoever, would there be an age at which people just wouldn't be able to outlive that is different from current life expectancy? [link] [comments]  |
| What would the night sky look like if we lived on a planet in a star cluster? Posted: 23 Aug 2016 11:27 AM PDT A little clarification: If we were surrounded by stars only a couple of light months away, how bright or big would these stars be? Would it appear to be daytime? [link] [comments]  |
| Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science Posted: 24 Aug 2016 08:05 AM PDT Welcome to our weekly feature, Ask Anything Wednesday - this week we are focusing on Physics, Astronomy, Earth and Planetary Science Do you have a question within these topics you weren't sure was worth submitting? Is something a bit too speculative for a typical /r/AskScience post? No question is too big or small for AAW. In this thread you can ask any science-related question! Things like: "What would happen if...", "How will the future...", "If all the rules for 'X' were different...", "Why does my...". Asking Questions: Please post your question as a top-level response to this, and our team of panellists will be here to answer and discuss your questions. The other topic areas will appear in future Ask Anything Wednesdays, so if you have other questions not covered by this weeks theme please either hold on to it until those topics come around, or go and post over in our sister subreddit /r/AskScienceDiscussion , where every day is Ask Anything Wednesday! Off-theme questions in this post will be removed to try and keep the thread a manageable size for both our readers and panellists. Answering Questions: Please only answer a posted question if you are an expert in the field. The full guidelines for posting responses in AskScience can be found here. In short, this is a moderated subreddit, and responses which do not meet our quality guidelines will be removed. Remember, peer reviewed sources are always appreciated, and anecdotes are absolutely not appropriate. In general if your answer begins with 'I think', or 'I've heard', then it's not suitable for /r/AskScience. If you would like to become a member of the AskScience panel, please refer to the information provided here. Past AskAnythingWednesday posts can be found here. Ask away! [link] [comments]  |
| Posted: 23 Aug 2016 04:48 PM PDT without checking the newspapers or internet, could a time traveling astronomer calculate the year by only the slight shifts in the constellations? [link] [comments]  |
| If the universe was homogenous after the Big Bang? What caused the initial stars to form? Posted: 23 Aug 2016 07:11 PM PDT The way I understand it, right after the Big Bang all the matter/energy expanded in a uniform way. If everything was uniform, how was there enough gravity in certain places to pull anything into stars? Wouldn't gravity be equal everywhere and cancel out? Was space time not created perfectly? [link] [comments]  |
| Posted: 23 Aug 2016 01:49 PM PDT |
| Why are significant figures so stressed in chemistry, yet unimportant in physics? Posted: 23 Aug 2016 04:48 PM PDT |
| I there a maximum strength for a permanent magnet of a given mass? Posted: 23 Aug 2016 09:20 AM PDT Pretty straight forward. If we held a 1 gram "blank" neodymium magnet to a junk yard electromagnet and another to a magnetar (magnetic neutron star), they should both become just as powerful, right? What limits the power they can achieve? [link] [comments]  |
| What special geology makes places like the Middle East, Malaysia, Gulf of Mexico so rich in oil? Posted: 23 Aug 2016 09:22 AM PDT |
| Why is cancer most common in reproductive organs that are exclusive to each sex? Posted: 23 Aug 2016 10:15 AM PDT Prostate cancer is the most common cancer in UK males, accounting for around a quarter (26%) of male cases. Breast cancer is the most common cancer in UK females, accounting for around a third (31%) of all female cases (Cancer Research UK, 2013). Why is it that cancer, is more likely to occur within the breast or prostate? (http://www.cancerresearchuk.org/health-professional/cancer-statistics/incidence/common-cancers-compared#heading-Two) [link] [comments]  |
| Can a neutron be polarized because of its quark composition? Posted: 23 Aug 2016 06:49 PM PDT A neutron is made of one up quark and two down quarks, so I'm wondering if this makes a slight polarizing affect in the particle. If it does, can you significantly accelerate a neutron by placing it near a large charge? Is there any truly neutral particle(s)? [link] [comments]  |
| Posted: 23 Aug 2016 09:40 AM PDT That is to say, if someone was monstrously familiar with looking at waveforms, would they theoretically be able to tell exactly what was in an audio file - right down to the words, notes, crashes, and bangs - just by looking at the visualisation? [link] [comments]  |
| How do we know that the Andromeda galaxy is moving towards us? Posted: 23 Aug 2016 12:19 PM PDT It is often said that Andromeda is going to collide with the Milky way. How do we know that? We can only measure the line-of-sight velocity (through Doppler shifts). There could also be a large tangential component, which would mean that Milky Way will NOT collide with Andromeda - they will simply pass by each other. As far as I know, we can't measure the tangential component, so why are we predicting a collision? [link] [comments]  |
| Why does summer/winter have less temperature variance than spring/autumn? Posted: 23 Aug 2016 09:28 PM PDT Or in other words why does it feel so much cooler during the night and so much warmer during the day during spring and fall but feels like there is less difference in temperature during summer and winter? Like it isn't that much cooler at night during the summer and isn't that much warmer during the day in the winter.? I live in northern Illinois if it is a regional thing if that helps. [link] [comments]  |
| Posted: 23 Aug 2016 01:11 PM PDT |
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