Sensei

CuCl2 + 2NaOH → Cu(OH)2 + 2NaCl If you want CuCl2 do reaction: Cu(OH)2 + 2HCl → CuCl2 + 2H2O While heating Cu(OH)2 will be converting to black dust CuO and H2O I just took CuO, and put in methane gas burner, and it's indeed green. With hand lighter it did not work though.

Perception of time by living organisms is subjective. No doubt. That's why we use clocks to precisely measure time. ToE, Theory of Everything, should be able to predict and calculate everything, in my opinion. If it cannot, it's not ToE.

Great. Then you should have no problem of showing us how you are calculating f.e. decay energy of Tritium. Please show calcs.

It's not enough to "have file I/O". It must be binary file I/O. Without binary mode, it's not possible to generate executable. I was trying to find example, and some MODERN implementations of Logo language (FMSLogo) have binary mode, some other has no mention of it.. f.e. Berkeley Logo has no mention of mode in OPENWRITE command, FMSLogo has additional parameter for mode. In FMSLogo tutorial there is said "If binarymode is FALSE or not given, then the file will be read as a text file." Giving impression that default mode of original OPENREAD/OPENWRITE is text mode, otherwise compatibility would be broken..

I am talking about making whole language, executable (binary) file, in other language. That requires full I/O file management control, at least.

You have to look what real means high current. Current, in amperes, multiplied by time is Charge: Q=I*t in Coulombs. 1 electron has charge equal to 1.602176565*10^-19 C. so if you divide Q/e you have quantity of electrons. In the case of Gold, or inert metal electrolysis, where is made Oxygen there are needed 4 electrons to separate 4 molecules of water: 4e- + 4H2O -> 4 OH- + 2 H2 and produces Hydrogen gas, which is appearing on negative electrode. OH- goes through water to positive electrode: 4 OH- -> 2H2O + O2 + 4e- Oxygen gas (half as much as Hydrogen gas) is appearing on positive electrode. (electrons taken by positive electrode) The larger current, the larger charge, the larger quantity of electrons and the more volume of gas produced. If your watt meter is counting current, or ampere meter, you can even predict amount (volume) of produced gas and how long you have to wait for it. High voltage (230 V) and low current (like 2 A), means that water is heated. Energy is spend on heating water, instead of splitting water molecules. P=I*U=230 V * 2A = 460 W E=Q*U=230 V * 1s * 2A = 460 J But with small voltage and large current: P=I*U=5V * 92 A = 460 W E=Q*U=5V * 1s * 92A = 460 J Same power, same energy, but different quantity of electrons, and different volume of gas produced. Energy does not disappear. It's wasted on heating water in the first case. But it's hard (expensive) to make really high current at home.

I would try making plotter. It's pretty similar stuff to 3D printer. It needs 2 or 3 motors that are going both directions. One for X axis, second one for Y axis, and third one for up-down.

I wrote app that was downloading stuff from net, and was writing these files to single folder, few hundred thousand files. Going to that folder is equal to making a tea (and waiting for water for boiling etc.) and drinking it.. Explorer.exe was exhausted.. Have to wait 15+ minutes on Core i7 to update. I doubt that author of this thread has problem with hundred thousand files. So the most likely his problems with speed of computer are not co related with quantity of files in the folder. I would add to this list, buying regular HDD for $50-$70 and installing system there. It does not have to be SSD (these are more expensive). It always helps. At least for few months. Get 1 TB HDD at least, must be 7200 RPM http://www.ebay.com/sch/Internal-Hard-Disk-Drives-/56083/i.html You need at least 4 GB ram for comfortable work though.

Not sure what you mean by "mutually exclusive" in the context of computer languages. But f.e. you can write Logo in C/C++/C#/Java/JavaScript/Net Framework etc. but you cannot write C/C++/C#/Java/JavaScript/Net Framework in Logo language.. Are not you mixing language with algorithm? In general purpose languages (majority of them, Logo excluded ) you can write pretty much the same algorithm, in their own version, with very little (subjective) changes. Have easier task for example than rubik's cube: binary search algorithm. And try making it in C, then in C++, then in Java, then in C#.. etc. In language that does not have object-orientated environment you can cheat by f.e. using call-backs, which will be emulation of virtual methods (C++ virtual method in reality is call-back internally). (in general solution to binary search algorithm it's needed for comparison of elements of unknown type at design time)

Point like object has still coordinates x,y,z, at least in 3d. Point like object at rest looked from other point like object which is moving (or reverse), can look like line. Imagine you see point at x,y,z at time t+0, then 1 ns (nanosecond) later, it's at x+vx*10^-9,y+vy*10^-9,z+vz*10^-9 then after yet another 1ns it's at x+2*vx*10^-9,y+2*vy*10^-9,z+2*vz*10^-9 and so on. Where is it? If it's changing constantly its coordinates (or we (observer) are changing our, does not matter).. What does mean that object is point like? That our (observer) vx,vy,vz is equal to vx,vy,vz of that object (for instance two cars parallel on highway). That we and that point like object are in the same frame of reference. Can you give some black hole coordinate x,y,z? Yes. Can you calculate distance to some black hole from f.e. Earth? Yes. Can you calculate distance from some black hole to stars in it's neighborhood, or to galaxy center? Yes..

I would rotate remote controller up-side-down, so buttons points down, and use normal tap water with used slightly humid toothbrush. After cleaning it up, put in on towel (without rotating), until drying. Water can't go inside against gravity. Remote controllers rubber buttons are often single piece of rubber, like this: Chance for getting water inside (especially if it's up-side-down) is pretty low.

f.e. Pair production is process in which high energy photon, changes to matter and antimatter: [math]\gamma + 1.022 MeV \rightarrow e^- + e^+[/math] Electron and positron (electron's anti-particle) Photon must have more than 1.022 MeV = 1022000 eV energy. 1 eV is 1.602176565*10^-19 J It's 500 thousands more than visible spectrum green photon. After exceeding ~2 GeV energy there can be created proton and anti-proton: [math]\gamma + 1876.544 MeV \rightarrow p^+ + p^-[/math] (that's 1836.15 times more energy than above 1.022 MeV)

Have you tried using zener diode parallel to circuit prior your current PCB? This will make sure no high voltage reach PCB. It will pass through zener branch. That does not sound like "power spike when the device is turned on"...

That's not needed. I am uploading APK to my FTP. And in browser in mobile going to URL, and downloading APK. I was also sending APK in mail and worked fine. But better compress it to archive. Then on mobile decompress archive. And pick up APK in file browser, and it'll be installed. It's easy to write your own FTP on mobile. Then go to from computer connected in LAN even by local IP address. In v5.0+ in Information About Device > State > there is info what is its local LAN IP address of mobile phone. In my case it's 192.168.1.20 There is also MAC address. Lower signal means further distance (typically radio signal drops inverse square law), or there are obstacles. But on station, there is no serious obstacles for signal. Ah, If they are all at maximum, and you're on the station waiting for bus to go, these additional one are from other buses around you..

Then watch the real particles in the real particle detectors, like in this video: http://www.scienceforums.net/topic/92471-the-limits-of-physics/#entry894800 Watch them by naked eye, not just numbers on white table, for more healthy approach.. f.e. alpha decay Isotope with nuclear spin=0, before decay has mass [math]m_{src}[/math], and is at rest, p=0. after decay newly made nucleus (with rest-mass [math]m_{dst}[/math]) has 2 protons less Z'=Z-2, has 2 neutrons less N'=N-2, and Baryon Number smaller 4 units, A'=A-4. Emitted alpha takes 2 protons, 2 neutrons. Decay energy (see my signature how to calculate it), is split accordingly to their masses. Energy prior decay is [math]E=m_{src}*c^2[/math] Energy after decay is the same, [math]E=m_{dst}*c^2*\gamma_1 + m_{alpha}*c^2*\gamma_2[/math] Momentum prior decay is 0. Momentums of new products is where you can show your math skills.. Are not they defined mathematically enough? Charge of particle -1e = -1.602176565*10^-19 C, or 0e = 0 C, or +1e = 1.602176565*10^-19 C, Kinetic energy of particle [math]m_0*c^2*\gamma-m_0*c^2\approx\frac{1}{2}*m_0*v^2[/math] for v<<c Rest-mass of particle measured by mass spectrometer. And observation how charged particle reacts for acceleration (more massive particle accelerates differently than lighter particle). And particle spin, measured in other device. ps. I think that students should go exactly reverse direction: experiments more than mathematics..

Sodium bicarbonate + Acetic acid -> Sodium acetate + Carbon dioxide (gaseous) and water. Sodium bicarbonate is used to bake cakes (2nd name for it is baking soda). So it's available in any food supermarket. I am using it to bake pumpkin cake. Yes, they works, because they're ions while dissolved in water. But you will have plentiful of other reactions going on, if you won't use inert metal like Gold. f.e. Acetic acid + Copper Oxide/Hydroxide -> Copper acetate + water. You see by yourself, bluish color is probably Copper wire dissolved in water.

Android or iOS? Typically WiFi are sorted by their strength of signal. Device most likely does not know what is their distance to router. Strong signal typically means very close router. (in the case of computer routers we can ping them, and measure time needed to receive reply from them, the closer they are the less time required to get reply) If you have Android device, and Android Studio installed, here is API for it. http://developer.android.com/reference/android/net/wifi/WifiManager.html public List<ScanResult> getScanResults () Return the results of the latest access point scan. Look at ScanResult definition: http://developer.android.com/reference/android/net/wifi/ScanResult.html As you can see there is no such thing like 'distance'. But if we scan at time t+0, and signal to some wifi is weak, and scan at time t+1, and it's stronger, and scan at time t+2, and it's full power, we were approaching router, the most likely. And reverse with dropping signal level with time.

333 mA is just maximum after exceeding it for too long time power supply will be damaged. What is the real current flowing through circuit, you should measure using the real ampere meter, plugged serial to your circuit, while it's running. Power supplies which can have many amperes cost plentiful of money. The cheapest thing you can do is using 230 V, 1-3 A rectifying diodes, 4 pieces, and make rectifying bridge. 1 A, 400 V max, rectifying diode cost $0.025 (yes, 2.5 cents), the last time I bought them. Even this smoothing capacitor is not needed. As electrolysis happens without it anyway. Transformer from 230 V -> 24V 5A, costs here $25 (250 times more expensive than above high voltage solution). Producing 25 mL of Hydrogen using 230 V takes 90 seconds, with Gold and tap water with salt addition. Producing 100 mL of Hydrogen using 230 V takes 90 minutes, with Gold and tap water without salt addition (less than 0.07 kWh energy used) The larger current, the more molecules are separated, and more Hydrogen produced. Whether there will be Oxygen on positive electrode, depends on what metal is used for it. I recommend Gold. 24 carat Gold, so rings 14 carats and 18 carats are not good enough and would be damaged permanently, as whatever 2nd alloy metal they have like Silver or Copper will dissolve. Water will be heated during electrolysis with such voltage. The worst est is electrolysis of water with Iron electrodes. Water temperature can reach 100 C. And current goes to 3 A (700 Watts). In this particular case, you need to watch it all the time. It won't be long maybe 20 minutes

Unplug antenna, turn on TV, and listen 'music of Universe'...

[math]A=\pi*r^2[/math] is area of base in m2 If you will multiply it by height: [math]V=\pi*r^2*h[/math] you will get volume in m3. Notice that you can have other shape as base, f.e. square [math]A=r^2[/math] Once it's multiplied by height you get: [math]V=r^2*h[/math] If h=r, it simplifies to: [math]V=r^3[/math] and you have volume of a box with all sides equal length.

Ask him to repeat experiment inside of Cloud Chamber, so traces will be visible and record able by digital camera.. Then he should use electric field, or magnetic field to learn charge of emitted particles. This way he will know whether he has alpha, beta, or some neutral particle like gamma. Trace will be bend accordingly to charge, and mass of particle. He should use mass spectrometer on Gold foil to see whether he has Au-197. Before and after using on it alphas. Did he use 100% 24 carat Gold? If he used 14 carat (58.3% Au), or 18 carat (75%) Gold, it's contaminated by secondary metals like Silver, Copper etc. 24 carat can be little contaminated as well. He should use mass spectrometer on it anyway though. Hitting contamination by alpha could influence results. If mass spectrometer will tell him, it's contaminated with Silver, he should check how is behaving Silver foil instead of Gold foil. If contaminated by Copper, try Copper foil instead. Then melt Gold and Silver, or Gold and Copper, together, and make various foils with different percentages of both. And check them to see which one behaves like this original Gold foil. Whether these additional alphas are appearing more often while using alloy. Decay energy of Am-241 is 5.64 MeV. Part of it takes Np-237, but still it's quite a lot for alpha particle kinetic energy.

But reaction is reverse.. MnO2 + 4 HCl → MnCl2 + 2 H2O + Cl2 Preparation page of https://en.wikipedia.org/wiki/Manganese%28II%29_chloride

Hello! Have you seen "The Holy Quran Experiment".. ? https://www.youtube.com/watch?v=zEnWw_lH4tQ Best Regards!

I prefer "how does photon interact with particles". Here you have summary of reactions: There is also absorption, and emission. https://en.wikipedia.org/wiki/Absorption_(electromagnetic_radiation) Fluorescence https://en.wikipedia.org/wiki/Fluorescence Luminescence https://en.wikipedia.org/wiki/Luminescence Not science questions..

Learning is usually done by asking questions, and listening answers, and asking further questions to extend knowledge.. I don't see it in your posts..