Sensei

He said that in the first line. (Eugene) Hecht wrote couple books about Optics. https://www.amazon.com/Optics-5th-Eugene-Hecht/dp/0133977226

I would say so it's normal in corporate IT... Developers come and go all the time..

To check pollution, I would not count on my own senses, rather on data provided by scientists regularly monitoring it. They vary from day to day, hour by hour. Smog warnings are issued from time to time. Especially in autumn (because some people are heating using coal, burning trash, in obsolete furnaces). Here it's no so bad as f.e. in many modern China cities, when they can't even see other people 20+ meters away due to smog.

That depends on how devastated is air in your city.. I am in pretty devastated environment, but always have balcony open between May to September. It would be unbearable due to increase of temperature in room during summer. Try different models. In my pharmacy there is dozen of different models.

NASA Aftermath of the Chelyabinsk Meteor https://www.youtube.com/watch?v=Q9KwK0izt5c Now imagine what happens if it is meteor with organic compounds, DNA/RNA, or even microorganisms.. They're spread on the entire planet, like this has been shown on the video, within couple days. On the raw planet, new life will appear the first time, but on planet with living lifeforms, it can have devastating consequences, and destruction of existing lifeforms and replacing them by newly arrived microorganisms.

You see laser path in smoke, because some laser photons hit molecule of smoke, and diffused in the all directions. Such photon is no longer part of laser beam.

Did you mean light bulb? Glass, vacuum pump, and wire made of metal with high melting temperature (f.e. Tungsten).

Only layman can say so. Black hole has no infinite mass, no infinite volume (one could ask for how many dimensions Universe you are talking about.. ?), no infinite density... If it would have infinite mass, it would suck in the entire Universe.. Black holes are categorized by their mass. f.e. BH inside of some galaxy is typically the most massive object. BH is made of particles that have been sucked in during its lifetime. Newly born BH, after supernova explosion, has smaller mass than previously existing star that exploded. Because mass has been ejected from it in the all directions, just core collapsed. Did you read any scientific article about some black hole.. ? f.e. they mention "black hole with mass XXX Sun masses joined with YYY Sun masses together and we know it because of gravitational waves we just detected"...

...and surface will never be perfect sphere... because of quantization of atoms that make this surface.. It's like pixels on screen. You look at circle on monitor screen, and see no pixels, only after heavy zooming in, they will be revealed. And usually it'll have anti-aliasing, to hide transition between totally black and totally white pixels. Studiot wanted 1 kg of Iron (Fe-56? Fe-54? There is few stable isotopes). 1000 g / 55.845 g/mol = 17.9067 mol * 6.022141*10^23 = ~1.0784*10^25 atoms. Arrange them on lattice, one by one.. How much do you need to zoom in to see atoms on spherical curvature..

Majority of crackpots that we have seen here were not educated in quantum physics at all.. Often even saying "wow" after the first time in their life seeing videos showing Cloud Chamber, that I gave, presenting result of radioactive decay, result of unstable quantum particle decay, on their own eyes..

Hotter body has slightly higher mass than colder body. After emission of photons, mass of body is decreasing.

If I were you I would start from buying 3D printer, if you don't have one, and making toy models of drones and helicopters, to gain knowledge and experience. If you will master it, you will be building them bigger, bigger and bigger with time.

It depends on shape of object. If photons will be radiated by heat sink internal piece they can be reflected or absorbed by another piece.. Spherical object won't have this "problem". Conduction and convection will happen inside of our object. Before being radiated as photons to environment around it. Imagine heat sink connected with sphere together. Heat sink part will be emitting photons at different rate than the rest of sphere. Also we should ask question whether object is made of uniform material, metal, or couple different materials, or it's radioactive material, decaying (and heating it inside, like it's happening with Earth's core).

I think so there is still not enough information. Objects with different shapes will radiate photons differently. See difference between Aluminium heat sink with large area, and f.e. Aluminium sphere with [math]4 \pi r^2[/math] area.

Nope. You asked about the fastest, not the most efficient way... Heated H2O2 will decompose to H2O and O2 (wikipedia page about Hydrogen Peroxide mentions what materials can be used to catalyse this reaction) But in OP you wanted to have Hydrogen and Oxygen.. not water and Oxygen.. If opening post, was not question, just tricky-question, to check our knowledge, then please share what do you know about the subject from your own experience (experiments?). Many members here will be interested to hear what you want to tell us.

Electrolysis.. ?

Perhaps other application is opening this file in read/write exclusive access mode.. ? Perhaps access to file is restricted? Application might not have permission to open file in certain mode (read/write,shared/exclusive). Try running Lotus in admin mode. Try opening file in other application, to see whether it's possible to read from it. Try copying it to public available folder. File is in shared folder in network? Many times when I had folder shared in network, after copying file, and trying to access it from 2nd machine in network, file could not be opened, because it was already in use on initial machine (for whatever reason, usually bug in application in which programmer "forgot" to close file.. shutting down application used to write file, closed file for real, and I was able to open it from network machine). Try following procedure: on desktop machine archive file, mail it to your self, on laptop open mail, unpack archive in public folder, and try opening it from application. Archives have checksum error codes, to verify files are unpacked correctly.

Colonizer of Milky Way galaxy... But first money has to be wiped out..

Like I tried to show in my post above it's between ~22 W/m^2 (~0.21 MeV average per neutrino) to ~34 W/m^2 (~0.324 MeV average per neutrino), while photons give us ~1370 W/m^2, after passing through atmosphere there is left ~1050 W/m^2 (at cloudless noon). Solar panel with efficiency ~16% will be able to give us ~170 W/m^2. 22/170 = ~13% (if the all neutrinos from pp reaction have been captured).

Yet another who don't see difference between rest-mass and relativistic-mass... Matter can be put to rest, decelerated, and we (observer/device) are at the same frame-of-reference (FoR) as that object. Then mass (rest-mass) is measured. Rest-mass of electron (or positron) is me=9.11*10^-31 kg So energy that can be released during annihilation of electron-positron is 2mec2 They will be in form of two gamma photons typically. 2mec2 = 2hfc Electron/positron before annihilation are in the same FoR as we are, after annihilation newly created gamma photons will be flying at speed of light..

This could be interesting for you Moontanman http://www.nature.com/nature/journal/v512/n7515/fig_tab/nature13702_F1.html?foxtrotcallback=true

You should read it as "it's not more than 2.2 eV", not "it's exactly 2.2 eV".. Even on graphics that you sent in 2nd post, there is <2.2 eV (less than sign).

You don't know what is m2, what is v2, and what is γ2. You just know m1=rest-mass of electron/positron, v1 and γ1know from observation of longer or shorter traces in f.e. Cloud Chamber in beta decay minus reactions. So assumption is made that energy is conserved, and thus the rest of energy is taken by neutrino/antineutrino in beta decay plus/minus (and daughter isotope little amount). Example graph that I found on the net: Bismuth-210 decays via: Bismuth-210 -> Polonium-210 + e- + Ve + 1.16129 MeV

Relativistic momentum is [math]p=m v \gamma[/math] And you don't know what is rest-mass of neutrino, in the first place. With constant rest-mass of electron-positron me= ~0.511 MeV/c^2

There is no single answer, different neutrinos, from different reactions which are creating them, have various kinetic energies. f.e. the most basic fusion reaction is: [math]p^+ + p^+ \rightarrow D^+ + e^+ + v_e + 0.42 MeV[/math] This equation can be written in longer form pp->He-2->D [math]^2_2 He \rightarrow D^+ + e^+ + v_e + 0.647447 MeV[/math] The more kinetic energy takes positron, the less is left for neutrino, and vice versa. So average energy emitted to environment around star is 0.21 MeV (or 0.324 MeV) or so, per fusion reaction. There is emitted 65 billions per cm^2 area at 150 mln km distance from the Sun to the Earth (inverse-square equation, if neutrinos are emitted uniformly in the all directions). 65*10^9 * 324000 eV * 1.602176565*10^-19 J/eV = 0.0033741838 J/cm^2 = 33.74 J/m^2 (divide by time=1s to have power in watts = 33.74 W/m^2.. Regular Sun photons have 1370 W/m^2 for comparison). Not so much, even if they would be the all captured by the Earth' materials.. This reaction won't trigger Chlorine-37 based neutrino detector. It requires at least 814 keV.