What effects would a projectile on Earth fired with near the speed of light cause? |
- What effects would a projectile on Earth fired with near the speed of light cause?
- An alternate way of reaching the speed of light?
- How did Mendeleev know the properties of the elements before they were measured by using his table?
- Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science
- Do water filters such as brita remove minerals such as calcium and magnesium from water?
- Where did all of the oxygen from the Carboniferous period go?
- Do other mammals get "morning sickness" during pregnancy?
- Does higher octane/premium gas actually cost more to produce? What makes it so much more expensive?
- What percentage of people are lesbian, gay, bisexual?
- Why do quantum states have to live in complete metric spaces?
- Does tension change the properties of ice?
- Why can foxes eat raw chicken while we cant, and how did we eat meat before we could cook it?
- To what distance are humans able to currently monitor any objects moving towards earth?
- What is the relation of Entropy and Diversity as effective numbers?
- If an infinite Taylor series can define trigonometric functions, and Euler series are constructed using trigonometric functions as their terms, why are there functions which can be described by Fourier series but not Taylor series?
- Why does single nucleotide polymorphism on the TAS2R38 gene cause a bitter taste in those who have the mutated allele?
| What effects would a projectile on Earth fired with near the speed of light cause? Posted: 11 Dec 2019 01:20 AM PST If we were able to accelerate a projectile (say the size and weight of an airsoft ball or a sand of grain) with a railgun (or really, by any other means, but on Earth), what kind of effects would it have? Would if be an effective weapon? Would it heat up to the atmosphere too much? Would it bend space-time to a noticeable state? How much of a destructive force would it cause on impact? Is it even possible in theory, if enough energy could be harnessed? [link] [comments]  |
| An alternate way of reaching the speed of light? Posted: 11 Dec 2019 01:05 AM PST So if your sitting on a giant clock that's hand is spinning clockwise, the further out you sit on the hand the faster you spin around the centre So what if the clock hand was 1000 miles long, and at the centre it was spinning 200mph, sitting at the end of the clock hand you would be going at least faster than the speed of sound Is there a length so great and base speed so high that the end of the clock hand would be able to go faster than the speed of light ? Edit: thanks for the great response guys! I know so much more now [link] [comments]  |
| How did Mendeleev know the properties of the elements before they were measured by using his table? Posted: 10 Dec 2019 05:06 PM PST My teacher was going over chemical equations in class but never went in depth of how mendelev predicted the properties of missing elements? [link] [comments]  |
| Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science Posted: 11 Dec 2019 07:08 AM PST 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]  |
| Do water filters such as brita remove minerals such as calcium and magnesium from water? Posted: 11 Dec 2019 03:15 AM PST I'm wondering specifically due to its ion exchange function and a vendor told me they can function specifically as a water softener, is this true? [link] [comments]  |
| Where did all of the oxygen from the Carboniferous period go? Posted: 10 Dec 2019 08:40 PM PST I was reading about the history of oxygen and realized there was an increase once photosynthesis developed. It peaked during the Carboniferous period, making insects very large (presumably), but what happened after that? Where did the oxygen go? [link] [comments]  |
| Do other mammals get "morning sickness" during pregnancy? Posted: 10 Dec 2019 08:32 PM PST I have never seen or heard of any other type of animal throwing up more often while pregnant. Granted, I am not around many other animals other than dogs and cats, so my personal experience means little in the matter. That's why I'm here, I'm just wondering, as my wife suffered through HG during both of her pregnancies and it was hell for her, so I was curious if other animals could suffer from something similar. [link] [comments]  |
| Does higher octane/premium gas actually cost more to produce? What makes it so much more expensive? Posted: 10 Dec 2019 05:25 PM PST I've always been told the "premium" label on higher octane gas is a bit disingenuous. There's nothing really "premium" about it beyond the higher octane rating. But why does that make it so much more expensive? Because less of it is produced? Is there some additive or chemical that costs more? Why is it sometimes >35% more expensive? That seems pretty crazy. [link] [comments]  |
| What percentage of people are lesbian, gay, bisexual? Posted: 10 Dec 2019 02:55 PM PST I am fully aware this is a controversial topic in society, but what does science know about it at the moment? [link] [comments]  |
| Why do quantum states have to live in complete metric spaces? Posted: 10 Dec 2019 04:51 PM PST The Hilbert space is used in quantum mechanics to define the space where the operators of a given system will act on. And, the quantum state of a system is an element of the Hilbert space. I understand that a Hilbert space is a vector space equipped with an inner product, which is also complete regarding the metric induced by the norm, i.e, it is also a complete metric space. I understand that the inner product is useful to compute the probability amplitudes. However, it's not clear to me why we also need the space to be a complete metric space. Is it because the Schrödinger equation describes unitary operators, which act on a complex space C^n. And C^n is automatically a complete metric space if we choose the standard inner product in C^n? In other words, it would be a consequence of choosing the inner product as the standard one? Thank you in advance! [link] [comments]  |
| Does tension change the properties of ice? Posted: 10 Dec 2019 04:08 PM PST Under compression (which causes increased pressure?), ice has a lower melting temperature. At low pressures, water freezes at higher temperatures. Does placing tension on a rod of ice change these properties? [link] [comments]  |
| Why can foxes eat raw chicken while we cant, and how did we eat meat before we could cook it? Posted: 10 Dec 2019 08:16 AM PST |
| To what distance are humans able to currently monitor any objects moving towards earth? Posted: 10 Dec 2019 06:48 AM PST |
| What is the relation of Entropy and Diversity as effective numbers? Posted: 10 Dec 2019 10:48 AM PST This is a very general question. Diversity numbers have different orders, with D0 being species richness, D1 being Diversity on the order of 1 and equivalent to the inverse of Shannon's Diversity Index. The general formula for species diversity is defined by Hill. However there also exists Rényi entropy, Tsallis entropy, and even the q-Gaussian. 1) How are these metrics related? I understand that Diversity is an effective number. So if Diversity is 15, the ecosystem can effectively support 15 species. 2) How do I determine which order of diversity should I choose? On this graph from this website, you can clearly see that the ecosystem has 500 species, but the diversity(1) is equal to 420, diversity(2) is equal to 375, diversity(3) is equal to 350. (The author made a mistake and mislabeled Simpson's index as D3 when it should be Diversity(2). This looks like a clustering algorithm, so how should I choose the correct order of diversity? [link] [comments]  |
| Posted: 10 Dec 2019 06:16 AM PST Take for example the Weierstrauss function, a kind of one-dimensional fractal which is continuous everywhere but differentiable nowhere. It can be described using a Fourier series, a sum of cosine terms, and not by a Taylor series (because those require the nth order derivative an infinite number of times and you cannot differentiate the function.) My question is, once you have a Fourier series built out of cosines, can't you just break out a Taylor series to define each individual cosine term? Granted, this would be an infinite summation of infinite summations. Is this just not possible? Reposting this at a reasonable hour in the hopes it'll get answered. [link] [comments]  |
| Posted: 10 Dec 2019 06:28 AM PST |
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