# Tag Info

3

NaCl melts at around 800°C. Molten NaCl has a density of about $1.556 \frac{g}{cm^3}$[1], at room temperature (solid) it has one of $2.71\frac{g}{cm^3}$ [2]. Sadly I could not find a value for the density at barely underneath melting point but I strongly assume that the density is a strictly monotonously falling function of temperature. Therefore solid NaCl ...

4

Yes, applying an electric field does create a pH gradient and in fact you can observe this simply by adding a suitable indicator to your system. For example see the section Demonstration of pH Gradient Formation in this article.

0

For an important special case, look up the topic of Hydrogen Embrittlement of Irons and Steels. This is not my field - I have a layman's interest for the reason discussed below, but I believe it illustrates some rough rules of thumb for when absorption into metals happens. The main process whereby absorption happens begins when the $H_2$ bond is cloven by ...

1

There is no universal, cheap, easy way to do identify unknown materials. There are some easy methods that apply to some materials: if something is attracted to a magnet then it is ferromagnetic, and probably contains a substantial amount of iron, nickel, or cobalt. There are a few other rules of thumb, but the general problem is complex and is the reason ...

1

Well, the fancy experimental way would be to use things like mass spectrometry or x-ray diffraction, or many other techniques. Doing it without those machines though... maybe chemistry would be your best bet. If you had a suspicion of what the material might be, you could use known chemical reactions to see what it does and doesn't react with, what it ...

4

Creating a vacuum above carbonated drinks causes the CO2 to outgas faster--simply because there is no CO2 above the drink to diffuse back into the liquid. In physical terms this means there is no vapor pressure of CO2 above the liquid, so net movement of CO2 is from the drink to the space above it. If you leave a closed carbonated drink bottle long enough, ...

0

if the reaction is not problem, the answer is proper. because nitrous oxide decomposition release energy. then the temperature is high than react with oxygen. In fact the temperature is high than reality. because the reaction is not correct. the reaction production include many other species.

1

Your diagram of 2 H -> He is extremely misleading. First, He has Neutrons and can't be made from just 2 H. It need deuterium and tritium and it's a multi-step process involving first making deuterium via $\beta^{+}$ decay. Also, your question and diagram seem to imply that there is a formula describing the curve you show but there isn't. Your curve is ...

1

Not really an answer, but rather some organized comments. First, you may become disappointed but the trully fundamental laws, as we know them today, are not written in terms of force laws. Even though the concept of force is still present in Physics, it is not used in the way it was before and which seems to be the way you are thinking about them. Force is ...

1

What laws (formulas) govern the fundamental forces of nature? None. Columb's law and Newton's law of gravitation classical explanations of electrostatics and gravitation,respectively. But the are no analogus formulas for fundamental interactions. They must be described in the context of Quantum field theory. QFT is to complex to give you a ...

0

Here is a link to a paper from October 13th 2013 for the ICCF-18 conference, co-authored by : Prof. Yeong E. Kim, Department of Physics, Purdue University, West Lafayette, Indiana 47907, USA, John Hadjichristos, Defkalion Green Technologies Corporation, 1140 Homer Street, Suite 250, Vancouver BC V682X6, Canada http://www.physics.purdue.edu/... Abstract: ...

-1

Maybe these NASA Langley docs might provide an answer.

Top 50 recent answers are included