-
Posts
7927 -
Joined
-
Last visited
-
Days Won
26
Content Type
Profiles
Forums
Events
Everything posted by Sensei
-
Not without a reason mercury thermometers were banned by majority of EU countries (except ~6)..
-
Do you have ketene? H2C=C=O + CH3COOH -> (CH3CO)2O
-
DIY INTERFEROMETER: Prove Einstein Wrong in 20 Minutes!
Sensei replied to Drew Paul's topic in Speculations
Do you realize that your water pool example, with waves, is made by molecules of water.. ? In 1 gram of water there is 3.34285*10^22 molecules of water. -
Ironious, better ask yourself what you will do with Hg compounds after you finish experiments.. ? Will you leave it on the shelf and forget? And then many years later f.e. drop it on the floor, flush in toilet or put to trash.. ? Quote from: http://en.wikipedia.org/wiki/Mercury(I)_nitrate "Solutions of mercury(I) nitrate are acidic due to slow reaction with water: Hg2(NO3)2 + H2O → Hg2(NO3)(OH) + HNO3 Hg2(NO3)(OH) forms a yellow precipitate." That should solve your question. ps. You can attach photos directly in forum, using Full Editor/More Reply Options.
-
That depends on voltage. I=U/R = 12 V / 100 ohm = 0.12 A P=U*I=U^2/R=I^2*R=12 V * 0.12 A = 12V^2/100 ohm = 0.12A^2*100 = 1.44 W Whatever method you calculate it's 1.44 Watts = 1.44 Joules per second of energy released by electrons.. They increase temperature of element. If you have some clever method of cooling and will consume energy faster than it arrives (liquid nitrogen? heat sink, fan ) then in theory element should survive much more current than in normal environment. With 1 Watt resistor, and 12 V, you can have up to 83 mA. 1 W / 12 V = 0.08333 A With 5 V, 1 W resistor should survive 0.2 A continuous current. Some suggests that you should have double wattage than typical usage. http://www.robogaia.com/how-to-calculate-resistor-wattage.html
-
You probably have 1 Watt 100 ohm resistor. Try replacing it by 2 W 100 ohm resistor.
-
if( ... ) { } else if( ... ) { } ... (as many as you want else if()) else { } I might add exception handling C++: try { .... } catch( [exception] ) { } throw( [exception] ); private public static (also in C) const (also in C) friend class virtual new delete operator built-in variable types like: char, short, int, long, long long, long int, float, double, void signed/unsigned
-
Did you set stop-loss? Are you observing stock markets on-line real-time.. ? Probably not.
-
Do you mean something like this? It needs voltage peak appearing on right wire in right moment.. See video how he is reversing movement by reversing order. Search also YouTube for "arduino motor" or "arduino stepped motor". Computer program sends data to arduino, like "set pin X to high", "set pin X to low". Write simple C/C++ for-loop, setting and clearing them in right order: 1,0,0,0 0,1,0,0 0,0,1,0 0,0,0,1 Delay between instructions will control speed of rotation.
-
Experimental Analysis of a Synchronous AC Motor and Fan Load
Sensei replied to CasualKilla's topic in Engineering
Typical ammeter will not work with AC, but DC. And will show 0 A, even though current is flowing (1/100sec one direction, 1/100sec other direction). Check whether yours ammeter can work with AC, if you really need this data.. -
Dark matter a result of fusion? (split from Iron spells end of star)
Sensei replied to shmengie's topic in Speculations
Each isotope has mass. It can be found on wikipedia f.e. http://en.wikipedia.org/wiki/Isotopes_of_iron(replace iron by name of any element). It is given in mass atomic unit denoted "u". http://en.wikipedia.org/wiki/Atomic_mass_unit f.e. Hydrogen-1 has 1.00784 u. ( mass of 1st particle + mass of 2nd particle that fuse ) * c^2 + their kinetic energy = total input energy. Similar with output products: ( mass of 1st product particle + mass of 2nd product particle of fusion ) * c^2 + their kinetic energy = total output energy. If total output energy is higher than total input energy, then simply such reaction cannot happen, as it would violate energy conservation. Basically there is no existing stable isotope with Z=52 (Tellurium), that would let two irons (with Z=26) to fuse together. http://en.wikipedia.org/wiki/Isotopes_of_tellurium The first (observatory) stable Tellurium isotope has A=120 (68 neutrons). But two Iron-56 can only give Z=52,A=112.. -
Iron spells the end of a star, I think not...
Sensei replied to shmengie's topic in Astronomy and Cosmology
Supernova is producing free neutrons in such amount that unstable isotopes are absorbing neutrons faster than they can manage to decay. http://en.wikipedia.org/wiki/R-process Neutron capture is process in which nucleus has increased mass number by 1 unit. If newly produced isotope is unstable, it's decaying after a while. But if new free neutron manage to hit it, it's increased again. http://en.wikipedia.org/wiki/Neutron_capture -
Here, searching Google for "Flywheels store electricity" gives couple links to Wikipedia English, http://en.wikipedia.org/wiki/Flywheel_energy_storage(what a surprise) then 30+ links, and Enthalpy ScienceForums.net thread (this one) is at 34 position (4th page).. after extending keyword to "Flywheels store electricity - cheap enough" it's at 5th position (1st page). I would like to note that position in search engine is related to how many somebody from Internet linked that website. If there are many references (either dynamic = cheating search engine, or real one, by real interested people), then obviously it'll go up in rank.
-
So how can you claim that "proton is single wave".. ? or even previous claim that "hydrogen is single wave".. ? If I will accelerate proton to right velocity and hit stationary particle it can turn to neutron f.e. [math]p^+ + p^+ \rightarrow p^+ + n^0 + \pi^+[/math] That's in article "particle creation" I gave you couple days ago (post #13), and you apparently again ignored literature worth to read. That's how pions particles (and 2nd muons) are created, and visible in Cloud Chambers on our own eyes! Highly accelerated proton enters atmosphere and hits atoms in atmosphere and 2nd cosmic rays are produced, and then we see their traces!
-
Ionization energy of proton-electron pair (Hydrogen) is 13.6 eV. That's it: you need to supply at least 13.6 eV energy (13.6 eV * 1.602*10^-19 = 2.17872e-18 J) to get rid of electron, and create free proton and free electron. And create Hydrogen plasma. You can do it by yourself. Hydrogen discharge tube costs 20-50 usd at most. Search Google for "Hydrogen discharge tube". 20 usd on Amazon. http://www.amazon.com/American-Scientific-Hydrogen-Spectrum-Discharge/dp/B004NWHLY4 Then you just need to have high voltage power supply. If you build your own on breadboard (f.e. Cockcroft-Walton generator), less than 20 usd. Do you have any reason to not buy them? To see everything on your own eyes? Instead of constantly speculating without even seeing what you're talking about. If you would have it, you would know it's not really "drawn to infinity", but only to positive electrode that's a few millimeters or centimeters away.. Are you aware proton is decaying to neutron in proton-rich isotopes? [math]p^+ \rightarrow n^0 + e^+ + V_e[/math] It's called beta decay plus. http://en.wikipedia.org/wiki/Positron_emission In quark model it's modeled by decay of up quark: [math]u \rightarrow d + e^+ + V_e[/math]
-
I have idea how to check whether issue is in your tap water: buy water in shop and try it instead.. f.e. distilled water in electronics/car equipment shop.
-
Energy to make proton and anti-proton pair (pair production) is 2*938.272 MeV = 1876.544 MeV or higher. If you're making up ToE, you should be also familiar with proton-antiproton creation in particle accelerator: http://galileo.phys.virginia.edu/classes/252/particle_creation.html Then rethink it: proton (or positive particle) can be orbited by other negatively charged particle such us muon-, pion-, Helium-4 can be orbited by anti-proton. Or vice versa (negative nucleus and positive "electron"-like particle). Read about exotic atoms: http://en.wikipedia.org/wiki/Exotic_atom http://en.wikipedia.org/wiki/Muonium http://en.wikipedia.org/wiki/Positronium http://en.wikipedia.org/wiki/Antiprotonic_helium Unlikely..
-
I suggest to analyze list of Baryons: http://en.wikipedia.org/wiki/List_of_baryons They're not protons, but also have +1e charge (-1e anti-particle, and 0e neutral), with larger mass-energy than 938.272 MeV. Electric potential due to point charge Q is: so for electron Q=-1e and for proton Q=+1e
-
Google search rating across different internet browsers
Sensei replied to Mr Rayon's topic in The Lounge
michel123456, to have fair comparison you should compare English-language (or same-language) only countries. Greek's plan is "σχέδιο" -
Google search rating across different internet browsers
Sensei replied to Mr Rayon's topic in The Lounge
Take for example keyword "pizza delivery". When you're in Los Angeles you are not interested in pizza delivery in New York, Sidney or London. Search engine should be taking IP address as one of hidden arguments and try searching "pizza" in your local area first to get rid of tons of potentially wrong answers (because of too large distance). -
If you never ever can remember your previous life it's not reincarnation but reusing of matter that's indisputable fact. After all atoms that used to be in chicken week ago, right now after meal are in your body.. Atoms that were couple hours ago in trees and vegetables are now in you. Plants released Oxygen to atmosphere, and you took it in breath, and they became part of your body.
-
I don't agree. Burning coal and producing CO2 in power station is/can be controlled process. It could be absolutely clean, if we want to. We can utilize products f.e. CO2 could be liquidized instead of releasing to atmosphere. Or passed through filters that will react with CO2 to form some other compound, that could be sold also giving additional income. Doing the same with car burned fuel multiplied by hundred millions cars is not realistic. Better and easier to do it in couple power stations than in every single car. It's a matter of good will, and ignoring oil industry demands, and their lobby.. Definitely. Switching to electric buses whole country would be a good start. Or at least city by city. And get rid of tickets. Free ride for everybody. One bus full of people is worth 200+ cars with just driver = 1 km of highway 2 passes full of cars less..
-
That reminds me the longest going physical experiment in the world http://en.wikipedia.org/wiki/Pitch_drop_experiment
-
Suppose so we have magic emitter sending signal at v=2c=600 mln m/s, (distances and time in our frame) at 1s delay from us, it's at d=2c distance, at 2s delay from us, after sending, it's at d=4c distance from us, etc. etc. at 1000s delay from us, it's 2000c (600 mln km) distance from us, then reply is returning after another 1000s. How it would violate causality? Delay in receiving reply would be half what is now, because of faster speed.
-
Why does instant recoil after a punch deliver a stronger blow?
Sensei replied to Elite Engineer's topic in Classical Physics
Do you have wifi in your model? If yes, then you could try what I can do in S6600, and control it by smartphone: Then write code in C/C++/Java(?) in smartphone app to take photo on demand in schedule that you want!