Thanks for bringing it back (I'm not opposed to having some tangents along the way, but the closer we can stick to the main question, the more likely it is that I will learn the answer)
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Ice forms at different temperatures under different pressures. Lower the pressure and the bond do not form until a lower temperature, super cooled water lower than 0C is present in the lower pressure upper atmosphere due to the energy in the water being more than the force it is experiencing.I believe you have that backwards--water is an example of a substance that has a higher freezing point at lower pressures (attributed to the lower density of the solid as compared to the liquid). At sufficiently low pressures, the liquid is completely unstable, and only solid and gaseous phases are left to interconvert (by sublimation and deposition).
purist - 1.
a person who insists on absolute adherence to traditional rules or structures, especially in language or style.
'c' is a variable in that it is is observer dependent.
Substances or reactions that generate any kind of light at normal conditions?
Not having to zap them with 10 million volts or burn them at 3000C.
What are substances or reactions that generate UV rays?Can you be more specific? There is a very wide range of wavelengths considered UV. Are you interested in emission that is narrow, wide, only UV, includes UV, coherent, polarized?
Yeah your right. Silly mistake on my part.
Quotet = log10(1 + 10a)For: Every time we go back an order of magnitude in time towards the Big Bang, the mass/energy density of the universe increases by 3 orders of magnitude, and quite different events and even different physics appears. So this logarithmic way of looking back at the big bang is a useful way to view it.
Against: Isn't this just a more sophisticated way of avoiding discussion on t=0 (let alone t<0)?