Recent content by Sedunov

The Equation (14 ) follows from the van der Waals equation, that is good for overall picture, but is not precise in details. The Joule-Thomson coefficient is very sensitive to parameters of the intermolecular forces. Therefore, it is better to use direct experimental data, generalized in...

I advice you to see the picture of counterpropagating laser waves at: http://en.wikipedia.org/wiki/Optical_lattice

1. You open the page: Thermophysical Properties of Fluid Systems. 2. On this page you select Methane instead of Water, select needed for you units of measurement, and select the form of database, for example, Isothermal. Then you press to continue. 3.On the page Isothermal Properties for...

Yes, Chewy! In quantum world any process of energy consumption leads to growth of the particle's frequency. And the particle with enlarged frequency has quite new propagation possibilities, including crossing the surface of metallic body.

The sudden changes take place in thermodynamic systems near phase transition points. For example, bubbles of vapor quickly grow near the boiling point of water.

If two beams are directed in opposite directions and have the same amplitude, in the gap between the lasers' ends will be a standing wave, like in a resonator. In this case the 180 degree phase shift can be established only for points in this gap, standing apart on a half wavelength. For other...

Dear Boka! You can find the Joule-Thomson coefficient values depending on T and P for many gases and fluids, including methane, in the NIST Database: http://webbook.nist.gov/chemistry/fluid/

Dear Pivoxa! Isothermal never means isolated. You cannot have really isothermal conditions without good thermal contact with some thermostate. So, isolation in this case is a misleading concept. Isothermal processes are always accompanied by heat flows through the boundary of the system. When...

Hi, Chewy and all participants of the discussion! When electron absorbs the photon, it changes own frequency, but not amplitude. Old, low, frequency did not permit electron to cross the conductor's boundary. But new, higher, frequency corresponds to propagating waves through the boundary...

Hi, Fr33Fa11! Your attempt to use change in kinetic energy should take into accout the change in potential energy, equal to GMm/(h - n) - GMm/h. Basing on it you can find the velocity dependence on distance: V = f(n). The time of flight can be found by integration of the expession dn/f(n).

Hi, Franz and everybody interested in the entropy of gases! It might be interesting for you to know that the Sackur-Tetrode equation is valid also for the translational part of the entropy of real and molecular gases with changing of the 5/2RT on the translational part of the enthalpy: H -...