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Everything posted by Sensei
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You made error even trying to rewrite your homework to forum post... As I showed. Put data in Open Office Spread Sheet/Excel, and figure out math equation which will match (fixed) curve.
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Please disprove my "Theory of the Sphere Grid Aether"
Sensei replied to neuromaton's topic in Speculations
So you made entire theory basing on BBC quote. I didn't know that BBC is so much opinion-forming medium.. -
Please disprove my "Theory of the Sphere Grid Aether"
Sensei replied to neuromaton's topic in Speculations
In scientific theory you can have no word, while you must have math equation(s), which will explain/predict how physical system (or isolated system) is behaving. After putting the right numbers in equation, somebody in future will be able to predict how other system will behave, in advance prior performing experiment. Which part of scientific articles, that you gave in post #3, is showing this.. ? BBC quote is not enough. Show it in scientific paper. -
Please disprove my "Theory of the Sphere Grid Aether"
Sensei replied to neuromaton's topic in Speculations
Barium-144 is unstable, with half-life 11.5(2) s https://en.wikipedia.org/wiki/Isotopes_of_barium Barium-144 -> Lanthanum-144 + e- + Ve + 3.1233 MeV (Lanthanum-144 is also unstable, and so on, so on) -
Try Daily Mail instead http://www.dailymail.co.uk/travel/travel_news/article-3084260/What-strange-sound-sky-Noise-heard-globe-nearly-DECADE-explanation.html or New York Post http://nypost.com/2015/05/19/eerie-trumpet-sounds-are-coming-from-the-sky/
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Please disprove my "Theory of the Sphere Grid Aether"
Sensei replied to neuromaton's topic in Speculations
If it would be like you're interpreting it, pear-shaped object would be pointing at one direction regardless of time experiment is done. Earth rotate (different hour), orbit Sun (different date), but direction vector would be still unchanged. Imagine these arrows are representing not changing direction vector: Then imagine how hour by hour, Earth is rotating. At noon you're ~13,000 km closer to the Sun than at midnight. It's enough to have small tidal effect from the Sun. Deformations correlated toward Earth center, Moon center, Sun, center of galaxy should exist. It would be emanation of gravity force at quantum level. -
In JavaScript and Java it would look the same..
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$4k is cost of solar panels alone, here. It's hard to discuss about labor costs. As one can set them up by himself/herself, while other, rich/lazy will prefer don't it by himself/herself. Couple years ago I went to shop and looked at cost of solar panels (because I was interested in installing such on my roof/walls). There is high VAT. 15% higher than in f.e. UK. So in UK, the same panels I found here, would/could be for less (at least prior this brexit madness). If you pay $4k and setup by yourself, it'll return in 5 years, but if somebody will set up them, and increase cost of installation x2-x3, it'll return in 10-15 years of usage..
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If somebody has enough money for house, probably have spare $4k for solar panels (certainly better investment than in bathroom/kitchen or pool in the garden). $4k is cost of 18 m^2 of solar panels (14 units with 1600mm x 800mm, retail price $250-$285/unit), enough to get ~ 350 kWh/month energy. Everything above $4k per 18 m^2 is Musk income... Problem with people is such majority of them don't think in advance enough long. They could spend $4k on these normal solar panel setup once (and be proud of using renewable energy source, so everybody can see it), and have energy from it to the end of their life free of charge, but they often don't know mathematics and can't calculate.. and have to pay electricity bills month by month..
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What on Earth is that? Isn't simpler to write if( ( key >= '0' ) && ( key <= '9' ) ) ?? Not to mention using isdigit() (and isalpha()/islower()/isupper() for a-z/A-Z range (I saw you used similar code for checking every character in alphabet from a...z in the past)) if( isdigit( key ) ) http://www.cplusplus.com/reference/cctype/isdigit/
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Cat meows. If cat not meows for a long time, cat is certainly dead..
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Apart from what has been said by other members. At high enough intensity of light, photons that were absorbed will cause significant increase of temperature of object, and change its physical properties. Shiny metal ball, after increase of temperature, will change color to red, yellow, white, and won't be reflective anymore. This could be also done with powerful lasers, instead of blowtorch.
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Transparent materials are visible because they have different refractive index than medium they are placed. When either medium and transparent material have the same IOR what's inside is not visible (at least in visible spectrum), as light pass through it without being bend. It's sometimes used by magicians to do this trick:
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You can't change photon with lower energy (visible light), to higher energy. Each to each. It would violate energy conservation. Object has to absorb couple photons with smaller energies, to create new higher energy photon. f.e. 2 eV photon + 3 eV photon = 5 eV photon. From two initial photons there could be one photon emitted back. Additionally UV photons, x-ray photons or gamma photons are visible, unlike what you think, but indirectly. If UV photon, or x-ray photon, or gamma photon, hits some object/atom/particle, there will be created new photons, which have energies lower than initial incoming photon. f.e. 5 eV photon = 2 eV photon + 3 eV photon. And you can see white light after using UV light source... It's used all the time for detecting security features in banknotes (they emit white light when they are illuminated by UV photons). You don't see UV photons directly, but you see other elements excited by them and emitting light at visible spectrum. Strong x-ray or gamma photon source will cause white dots appearing in your eyes even if you close eyes (very annoying if you're astronaut).. They can be also visible by cameras as you can see f.e. in this video
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Check this:
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Need help solving the mass of 9.01 x 103 mole CF4(g)
Sensei replied to CuriousStudent's topic in Homework Help
Molar mass is in [math]\frac{g}{mol}[/math] units. After multiplication by moles, you get simple grams, because mol^-1 (denominator in g/mol) and mol cancel each other. [math]\frac{g}{mol} * mol = g[/math] Atomic mass is in a.m.u (mass atomic unit), shortcut u. It's approximately 1.66*10^-27 kg. After multiplication by 1000 (to get grams) and multiplication it by Na (Avogadro constant), you get g/mol. Which is very large number of atoms or molecules (6.022141*10^23). f.e. 12 u * 1.66*10^-27 kg/u * 1000 g/kg * 6.022141*10^23 mol^-1 = 12 g/mol -
Searching for manufacturer of stick, we can find this: http://www.integralmemory.com/faq/usb-using-my-integral-usb-flash-drive-i-get-message-%E2%80%9Cplease-insert-disk-driveformat-drive-why-oc http://www.integralmemory.com/faq#t15n276 There is also question in FAQ about merging partitions on Integral ICE. Check it also. Did you try formatting (or initializing) it in device like digital camera or other external device.. ?
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Then don't try to arrive to final answer immediately, but show us what you did so far, starting from calculating moles of newly produced compound in reaction. Not AgCl, as it's already known. AgCl precipitated. What is "left behind".. ? How many moles? What mass?
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I need a 3D map of the universe out to 400 ly...suggestions?
Sensei replied to rrw4rusty's topic in Astronomy and Cosmology
In what sense "play with"? In Milky Way there is more than 100-400 bln stars. You can't even load it to computer memory at once.. If one star has properties x,y,z and brightness, every 32 bit float (pretty inaccurate), it's 128 bits per star = 16 bytes per star = 1.6e+12 bytes = 1490 GB needed. If you have 8 GB memory in computer it's ~190 times less than needed. Google for "database of galaxies", there will be some on-line db of galaxies. You can write PHP/Python script trying to extract data from them, one entry for each galaxy. Store in f.e. CSV (or multiple files) or MySQL database on your computer. Then you will be able to generate whatever you need in C/C++ code. -
Am I doing something wrong with my print statement?
Sensei replied to ally123's topic in Computer Science
You're dividing num by 10 every loop execution, until it's 0. Then you're showing num, which is obviously 0. Make spare variable int num2 = num; and show it instead.- 1 reply
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problem with surfing this forum (http://urlm.co/www.scienceforums.net)
Sensei replied to fresh's topic in Computer Science
Ah, right, she did tell. -
problem with surfing this forum (http://urlm.co/www.scienceforums.net)
Sensei replied to fresh's topic in Computer Science
But we don't know which OS she is using.. She didn't tell. -
If there is function reading BIOS content, then it could be used on the fresh mb (prior the first time turning wifi/network), then calculate checksum (couple different methods), and keep copy of it. Then read BIOS content periodically, let it be 1 per day, 1 per hour, 1 per minute, to find out whether there is change, and compare checksum with previously stored. One guy argued with me that if BIOS is replaced, it could also replace routine responsible for reading current BIOS content, to return something which is original, instead of the real content.
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problem with surfing this forum (http://urlm.co/www.scienceforums.net)
Sensei replied to fresh's topic in Computer Science
That has been already said in post #3 and below: try changing DNS to different one.. On every operating system it's done different way. -
It could contains more than you expect from capacity, if it's compressed, and decompressed during startup to regular memory by decompressing routine.