Everything posted by Ghideon
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Today I Learned
Today I learned that skills improved by participating here on scienceforums can, at least in some minor way, be helpful in the current virus situation. I joined a local initiative where students studying from home can ask about math and physics. Debating science here has made me more confident regarding mainstream science and how to respond with useful hints (instead of solutions) to homework questions.
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Why Can't We With Water?
That is a good point. Redistribution of large amounts of water is not impossible, but hard to do cheap or with limited resources. There are large projects to redistribute water across seasons (Hoover Dam for instance) so with appropriate political will, need and organisation it would be possible to do geographically as well.
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Why Can't We With Water?
I cannot claim to be an expert but there is some quick local numbers. Also note that the local conditions here seldom causes drought. In Sweden there is a yearly production of 900x10^9 l of drinking water produced* Fuel delivered for usage by vehicles is approx 12x10^9** That means that the drinking water volume is 75 times the volume of fuel. And note that this is drinking water only. To that one have to add the vast amounts of water needed for other purposes such as farms. One figure I found* is that the amount is approx 28 times the volume of drinking water. The above example means that if 1% of the water would require a relocation it would still be approx 20 times the volume of all fuel transported. So in addition to the problem of making a profit as stated above there is the issue of delivering enough volumes of water to make a practical difference. References. Sorry, some may not be available in english at this time: *)https://sydvatten.se/vattenforbrukning/ **)https://spbi.se/statistik/volymer/
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How to define arc of definition?
It may be easier and more efficient if you also provide a picture? If each interested member have to interpret your description there is plenty of room for confusion?
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math test
Three different modes tested: [math]f(x):=0[/math] \(f(x):=0\) [latex]f(x):=0[/latex] Code for above is [math]f(x):=0[/math] \(f(x):=0\) [latex]f(x):=0[/latex] Screendump from browser Mathjax-config: inlineMath: [ ["\[math\]","\[\/math\]"], ["\\(","\\)"], ["\[latex\]","\[\/latex\]"] ],
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How to define arc of definition?
Thanks, that's a better expression.
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How to define arc of definition?
Can you explain what that means? If your definition is identical to Pi then it is some redundant definition. If you get another value in your definition of Pi then your definition is wrong; it is not Pi anymore. As I said in a post above: pi, defined as circumference/diameter of a circle, seems to have an non ending sequence of decimals when expressed in base-10: 3.1415... that does not mean that circles, pi or their definitions are approximations. If you need to write Pi as a number maybe you could have look at base-Pi numbers at wikipedia.org/Non-integer_representation#Base_π or the source at http://datagenetics.com/blog/december22015/index.html
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math test
1: PNG: 2: Plain text: f(x):=0 3: text between math brackets: [math]f(x):=0[/math] 4: Screenshot of line 3 above before pushing submit:
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Volume calculation help
Hello! A quick hint: the question is for Jupiter's volume, is the unit of your suggested answer a volume?
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How to define arc of definition?
Thanks for confirming. Probably a language issue then, I know and understand a few things about arcs, circles and trigonometry. But I have been unable to find anything about "Arc of definition" in math.
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How to define arc of definition?
Question: By ”arc of definition” Do you mean ”an arc of the unit circle”?
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How to define arc of definition?
Ok. Please post the result and the issue it solvets once you have made progress. In the meantime I’ll continue doing my work, using trigonometry, transforms, straight lines, curves and other mathematical concepts. From what I’ve learned so far there is no need for any new definition of arc or trigonometry. Sorry that you think your own question is a waste of time. (Or maybe translation messed up your comment?)
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How to define arc of definition?
Can you clarify your question, maybe by providing a picture and/or formulas?
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How to define arc of definition?
Why? AFAIK value of trigonometric functions are exactly defined. Ability to numerically express a value exactly, using a limited amount of decimals, is not an issue with the definitions. Analogy: pi, defined as circumreference/diameter of a circle, seems to have an non ending sequence of decimals when expressed in base-10: 3.1415... that does not mean that circles, pi or their definitions are approximations.
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The Official JOKES SECTION :)
Welcome to our sponsored member poll! Answer the questions for a chance to win a premium set of headphones. The selected winner will be PM’ed by our staff. What is your self-assessed level of expertise within your favourite area? (check one option) - Beginner - Average ⌧ Professional What is our self-assessed level of confidence regarding your contributed material? (check one option) - Poor, I never feel that I’m, right - Most of my posts are correct ⌧ I am never wrong What forum section do you most often post in? (Select one from the drop-down list) Speculations If you are drawn as winner, what brand of headphones do you prefer our sponsor to ship to you? - Bang Olufsen - Bowers & Wilkins - Harman Kardon ⌧ Dunning Kruger
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Only 10% of the Nobel prize winners are atheist ?
The second link in OP (https://emilkirkegaard.dk/en/?p=7237) states that the 10% claim is "bullshit". It does not support the 10% claim and gives several reasons why the number may be incorrect. Talk page of wikipedia "List of nonreligious Nobel laureates" states "The main source of this article is not reliable": https://en.wikipedia.org/wiki/Talk:List_of_nonreligious_Nobel_laureates#The_main_source_of_this_article_is_not_reliable Good points, I'll add a local example. Wikipedia lists 32 swedish laureates. During the years of Nobel Prizes Sweden have made several changes* to how church and state are related. Those reforms could impact what individuals would have answered at that time compared to more present times. It would require a lot of rigor to be able to produce reliable definitions and a usable list. This is just an example, for one single country, intended to highlight the difficulty with this kind of material. *) https://www.svenskakyrkan.se/church-and-state until year 2000 state and church was united Swedish only found: http://www.notisum.se/rnp/SLS/lag/19510680.htm Until 1952 you had to belong to a religious community, you could exit stat church only if you registered at another religious community.
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Today I Learned
Today I learned the term aphophenia: seeing significance and meaning where there is none. It has interesting examples in for instance finance and statistics that I did not know had this common term. https://en.m.wikipedia.org/wiki/Apophenia
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Electric charge – a different approach
Read it all or skip some parts? I think I'll combine the two above and carefully exclude all of the material for now. But if you are able to post a complete and consistent description of your idea, (preferably together with some math or references backing up your claims), I'll try to read and review it.
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The ebb and flow of the light.
AFAIK supernova models matches observations pretty well. Since you have reason to believe that to be plain wrong, can you provide a reference?
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Unidentified DNA
@CharonY have posted good answers, I'll just add a few layman notes. If the sample is indeed unknown or unidentified due to some reason that's all there is to say: "unknown" or "unidentified". Cryptids does not exist according to current evidence available in mainstream science. No lab is going to have big foot, chupacabra or other cryptids' DNA in store for reference. An unknown sample could possibly be classified as a potential new species, related to some other known species and call for further scientific research. But I can't find a scientific argument why "unknown" DNA alone would be evidence for existence a cryptid. Another related thread* was just posted, possibly an example where a DNA test could return "unknown". If a hair sample belonging to an extinct species was analysed, without any context or details known, the result might be "unknown"? *) https://www.scienceforums.net/topic/120650-18000-year-old-dog-found-in-permafrost/?tab=comments#comment-1124191
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Unidentified DNA
What is a cryptoid*? Is this about Cryptozoology? *) Do you mean cryptid?
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Unidentified DNA
Since there are different types of DNA tests, what type of test did the hypothetical lab use on the hyptetical hair sample? I guess the experted outcome could be method dependent.
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Electric charge – a different approach
Or Which one is it? I have read you material several times. First statement in chapter III is That seems to refer to chapter II, a chapter that you now say does not matter. Maybe you could edit the material so it makes sense instead of repeating the request that it should be read over and over?
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Electric charge – a different approach
Repeating it does not make it any clearar. I have tried various ways to get a clear picture what the idea is so it can be investigated with more rigor. If the images I posted are correct, say so. If they are not correctly showing your statments please provide some other description than a repetition. Maybe you can supply a picture?
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Electric charge – a different approach
Ok. But then the philosophical part you create must make sense and not contradict what is already modelled mathematically and experimentally confirmed. I'm trying to find out what you actually claim to be similarities between gravity and charge. Here are two pictures, one for each statement: (Two different masses and gravitation from a third, large body) Does the pictures show what you intend to say?