Everything posted by Sensei
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Synthesis of Purple Gold!!??
On eBay/Alibaba/etc? http://www.ebay.com/bhp/vacuum-furnace
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Why do religious people keep trying to invent a conflict between belief and Science?
Well, there is huge, deistic god won't reveal himself/herself to humans, so scientists can't make any experiment with him/her. To start making experiments, scientist has to have some revelation of phenomena. Humans wouldn't know about magnetism if there would be no natural magnets, and any other way to magnetize objects. Humans wouldn't know about electrostatics if there would be no way to charge objects by rubbing them.
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Neanderthals Built a Water Reservoir
I have better news for you. Bonobo builds a fire and toasts marshmallow The problem with "constructions" is that they are typically made of material easy to process. Animals use wood, early humans also used wood. And nothing remained to our time. Beavers are building dam from wood. If they would extinct, prior human, nobody now would believe that they could build dams..
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The Official JOKES SECTION :)
That should be banned! It's mistreat with cruelty poor chimp..
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Temporal Uniformity
One of the best examples of spin IMHO is radioactivity. Say we have radioactive isotope with even quantity of protons and neutrons, f.e. Uranium-238 has 92 protons, and 146 neutrons. Both even. So it's composite boson with spin 0. It's decaying: U-238 -> Th-234 + He-4 + 4.267 MeV To Thorium-234, which has also spin 0. Helium-4 has also spin 0. So decay is immediate. And decay energy is split immediately to Th-234 and He-4. Appropriately to their masses to conserve both energy (E=mass of uranium-238 nucleus * c^2) and momentum (initially 0). But if radioactive isotope is fermion, it has fractional nucleus spin. f.e. Uranium-235 has 92 protons, and 143 neutrons. Spin 7/2 It's decaying: U-235 -> Th-231 + He-4 + 4.86 MeV Th-231 has 90 protons and 141 neutrons, spin 5/2. 7/2 dismatch 5/2 obviously. So there is needed gamma photon to be emitted by excited nucleus after decay.. Excited nucleus has more mass, and more total energy, than in ground state. So alpha particle is accelerated to smaller velocity, and has smaller kinetic energy, and smaller relativistic mass than like it would be in 1st case with U-238.
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Temporal Uniformity
This movement of daughter isotopes and products is final stage. This is decay energy, easily calculated as I am showing in article from my signature. Because you are not familiar with it. Say we have Uranium-238, with m0 = 238 g/6.022141*10^23 = 3.95208282e-22 g It's decaying to Thorium-234, and Helium-4. If you subtract rest-mass of U-238 from rest-mass of Th-234 and rest-mass of He-4, you will have missing-mass, in u units, multiply it by 931.494061 MeV and you will have decay energy in MeV units. m0 = 238.051 u m1 = 234.044 u m2 = 4.0026 u m0-m1-m2=238.051 u-234.044 u- 4.0026 u=0.0044 u 0.0044 u * 931.494061 MeV/u = ~4.1 MeV (actual value is Uranium-238 -> Thorium-234 + alpha + 4.26992 MeV) Basically rest-mass m0 of isotope prior decay, is equal to relativistic-mass of daughter isotope plus relativistic-mass of alpha particle (for composite Boson as is U-238).
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Temporal Uniformity
How about radioactivity? [math]m(t)=\frac{m_0}{2^\frac{t}{t_{1/2}}}[/math] m0 - initial mass of radioactive isotope f.e.[math]^{14}_6C[/math] https://en.wikipedia.org/wiki/Carbon-14 t1/2 - half-life for [math]^{14}_6C[/math] is 5730 years. so after 5730 years we find that [math]m =\frac{1}{2}m_0[/math] There is no motion involved in this calc. We find animal body, carbon ore, ancient artifact, we know how much of Carbon-14 it should have, and measure what is actually mass of this isotope, and finding out how much of time was needed to decay isotope to have such effect. Reverse of above equation. Instead of measuring mass m at time t, measure time t from known m0 and m and t1/2.. Radioactive dating article: https://en.wikipedia.org/wiki/Radiometric_dating
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Temporal Uniformity
One can move in +1m in X axis in f.e. 1 second, or 2 seconds, or 1 hour, or +1m Y axis in 1 second, or 2 seconds, or +1m Z axis in 1 second, or 2 seconds, (or any other distance d, less than c, in time less than t=d/c) Then how can you say "and thus no fourth dimension is needed to explain it.".. ?
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Temporal Uniformity
Correction: you can't do it for bound-to-atom electrons. But you can do it for free electrons, traveling through vacuum, or through cloud chamber or other particle detector and leaving trace (and slowing down while traveling through medium). The more kinetic energy had particle, the longer trace. Long thin traces are from electrons. Short thick traces are from alpha particles (Helium-4 nucleus) But can you describe where is each atom in every molecule.. ? Either no. For polar molecule it's to some level of precision possible, because they have one region of molecule more positive and opposite more negative. So after flying though external electric field they rotate accordingly to electric field (other electrons or protons gathered on metal electrodes). But for perfect non-polar, it's pointless, as protons and electrons in molecule cancels each other nicely.
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Temporal Uniformity
Mordred, you think your links are absolute truth, undeniable dogmas. There is needed more humble opinion. Don't reject experimental evidence prior you know it first.. (whatever it is).. f.e. Dark flow https://en.wikipedia.org/wiki/Dark_flow ps. You don't know, what you don't know..
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Temporal Uniformity
It's way more complex than you may think. Say we have gamma photon with energy exceeding 1.022 MeV energy (f>=2fC), once it will collide with stationary atom (stationary in it's own FoR), there is created electron-positron pair. [math]\gamma \rightarrow e^+ + e^-[/math] But we have something like redshift and blueshift Relativistic Doppler effect. [math]f=f_0\sqrt{\frac{1+\frac{v}{c}}{1-\frac{v}{c}}}[/math], blueshift [math]f=f_0\sqrt{\frac{1-\frac{v}{c}}{1+\frac{v}{c}}}[/math], redshift So, if our atom prior collision with photon, is accelerated to significant speed of light, photon that had not enough energy, in "normal" circumstances, will be blueshifted, and in accelerated FoR will have enough energy for pair-production.. ps. It's all about definition of "what is mass", "what is energy", "what is length" and "what is time" (regardless of what swansont is saying it's not definable in numerous of threads). Unlike him, I think they're essential questions in quantum physics.
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what's a good programming language to learn?
I thought so meaning of "official software" and "unofficial software" is obvious. Official version of software is made and released by original authors, or company which currently have copyrights for product. Unofficial version is made by some volunteers. And typically can't be sold, because it would violate copyrights of original authors. f.e. if I would take source of Apache, add something to it, compile, it would be my own unofficial version of Apache. Official Apache versions are released by Apache Software Foundation. No. Not generally. But Microsoft is author of .NET Framework and owner of copyrights, so in this particular case it's official. In the case of API, it has slightly deeper implications: original authors have original sources, and know everything in details about product. Unofficial are relying only on released API docs. So if something has not been mentioned in docs, unofficial version of f.e. language, will be incomplete, and might cause issues with certain software which utilized these not documented features.
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what's a good programming language to learn?
.NET Framework is official product of Microsoft.. PHP authors compiled by themself their product to Linux, Microsoft did not.
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what's a good programming language to learn?
You didn't understand. I was talking about running C# and .NET Framework on Linux as a 3rd party unofficial hack.. LAMP is fine. Runs natively as their original authors intended and compiled to Linux..
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what's a good programming language to learn?
PHP is running on Linux natively, while C# doesn't have official support for Linux by Microsoft. Just some 3rd party hacks... Yet another thing to worry about whether particular code will work or not.. And yet another dependency on 3rd party.. And you have to have administrator privileges to install it in the first place. Web-servers are typically Unix/Linux machines.
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The Official JOKES SECTION :)
Top Gear 4 Episode 2: Richard Hammond hypnotized and can't drive car: https://www.youtube.com/watch?v=B92M2Fy7zMk Here is what happened later in studio (start at 3 min): (unfortunately can't find any better quality on YT)
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The Official JOKES SECTION :)
Jamie Oliver visits ordinary USA primary school...
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What are you reading?
Dune is actually series of 6 books made by Frank Herbert (and even more by his son). http://en.wikipedia.org/wiki/Dune_%28franchise%29 Reading 1st volume is just beginning. It's hard IMHO (1st the easiest).
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The Official JOKES SECTION :)
Gibraltar vs Ireland match: https://www.youtube.com/watch?v=s3i8h9N8Gr8 (I hope so YouTube won't delete it quickly)
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Solar fusion, neutrinos and age of solar system
Using this graph we can calculate energy that Sun emitted in all its predicted by model lifetime. We can draw three figures. Triangle 1: [latex]A_1 = \frac{1}{2}*(0.9-0.75)*0.4 = \frac{1}{2}*0.15*0.4 = 0.03[/latex] Triangle 2: [latex]A_2 = \frac{1}{2}*(1.0-0.75)*(4.56-0.4) = \frac{1}{2}*0.25*4.16 = 0.52[/latex] and rectangle: [latex]A_3 = 0.75*4.56 = 3.42[/latex] (1.0 represents power of current Sun) Sum of their areas: [latex]A = A_1+A_2+A_3 = 0.03 + 0.52 + 3.42 = 3.97[/latex] [latex]\frac{3.97}{4.56} = 0.87061 = 87\%[/latex] of idealized energy emission from 1st post. [latex]P_{average} = 3.8651*10^{26} W * 87\% = 3.365*10^{26} W[/latex] Energy emitted for the last 4.56 bln years: [latex]3.365*10^{26} * 60*60*24*365.25 * 4.56*10^9 = 4.8423243744*10^{43} J[/latex] So, instead of [latex]9.17*10^{37}[/latex] Helium-4 atoms produced per second there will be average [latex]7.9835^{37}[/latex] [latex] t = \frac{1.101*10^{56}-8.1978*10^{55}}{7.9835^{37}}=3.52252*10^{17} seconds = 11.13[/latex] bln years
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Soft "Science" and Evidence of Your Own Eyes.
Remote desert? It's just 8 km in straight line from Nile.. Currently the first green trees are 100 meters from Pyramids.
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Soft "Science" and Evidence of Your Own Eyes.
Imagine such device: Each block of rock used to build has average 2.5 tons. We can lift it up on little "boat", place rock on it, surround it by wood walls, fill container with water, and block is 1 level up. It's moved to it's place. Water is released. Boat goes down. New block of rock is placed on boat, and it's filled by water again, and cycle is repeated. We can imagine row of such water-lifters, around whole pyramid. Obviously when one level is finished, new lifters have to be build on above level. We would have to pump water to the top most lifter. Egyptians were using pumps since ever to irrigate grain fields, so technology is present. Water released from lifter in above level, can flow to below lifter, so it's reused, and less water have to be pumped.
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Soft "Science" and Evidence of Your Own Eyes.
Have you bothered reading Rosetta Stone article, I provided? There are 3 languages used on it, and more or less, the same content.
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Soft "Science" and Evidence of Your Own Eyes.
What a nonsense you are writing.. How we would know names of kings and pharaohs without being able to identify symbols.. ? Have you heard about Rosetta stone? http://en.wikipedia.org/wiki/Rosetta_Stone
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Solar fusion, neutrinos and age of solar system
Neutrinos are taken into account. See below "Sum of energies". I am adding just once 0.42 MeV, assuming 50% of energy is taken by neutrino. 73.46% Hydrogen and 24.85% Helium from photosphere are pretty accurate measurements (similar content has Jupiter), as they're obtained from spectral lines of light from the Sun. What is inside is prediction from models, and will remain this way. After all we won't send there any device to check it experimentally.