Dear all:
Please help me to know how these expressions are obtained. Please recommendme some web reference to search more about the demonstrations.
Vrs=r∇s+s∇r
∇.sv=(VS.v)+s(∇.v)
This expressions are very important in transport phenomena and fluid mechanics.
With all the...
Dear all!
I think the main difference between scalar and vector fields is that vectorial fields are composed of vector elements that varies among them.
Scalar fields are fields that have large regions of equal magnitude, variations are just presented in different regions.
Please bring me help...
Dear mates:
I'm looking for a reference of the chemical engineerin problems: heat transfer unit operation, separation unit operation, grind unit operations, reactor operations for metallurgy and material science industry.
Please recommendme the best one you know
With all the best...
ok Euquila! I think I have to take into account that Quantum mechanics tells you that there is also a probability that a photon is emitted as a result of this collision, which would carry off some of the momentum/energy
Dear mates:
During ionization with radiant energy there is a photon emission (see http://hyperphysics.phy-astr.gsu.edu/hbase/mod3.html). I know photon emission occurs by a decay of radiant energy from a excited state and what is confusing to me (I can't find a logical conection) is that...
To whom is able to answer this:
I think that when radiant energy get in contact with matter three basic phenomena take place:
1.- Transmission
2.- Reflection
3.-Absorption and emission
I think this three basic phenomena enclose all phenomena that can occur after the interaction
I wait for...