Abbas Majidi Bidgoli

10 Questions 11 Answers 0 Followers

Questions related from Abbas Majidi Bidgoli

What is the role of the restrictors in gas chromatograph?

Hello, As you can see in the figure, restrictors are on the way of carrier gas or some time sample gas. Why do we use the restrictors in gas chromatograph systems? what is the role of this part?

09 September 2018 10,117 3 View

How do I add time dependence variable in COMSOL?

Hello I want to add a time dependence external force such as a pulse into my model in comsol. How do I add this? in general, How can I add a time dependence variable or dipole(for example) in a...

08 August 2016 720 2 View

How to use previous solution as initial value of pressure in second study in COMSOL?

Hello I am use two "Pressure Acoustics, Transient" physics (actd & actd2) and two "Time Dependent" study (sol1(for actd) & sol2(for actd2)) and in 3D I have two regions with different...

08 August 2016 7,621 6 View

What is the vibrational level n probability in thermodynamics equilibrium condition?

Hello for a diatomic gas in thermodynamics equilibrium, what is the vibrational level n probability? is below equation correct? P(vibration level n probability)=(1/Total Partition...

07 July 2016 7,289 2 View

Why don't we consider electronic level of molecule as degree of freedom such as vibration and rotation?

Hello we know a nonlinear molecule has 3N degree of freedoms. 3 are translational, 3 are rotational and 3N-6 are vibrational degree of freedoms. but The molecule has another degree of freedoms to...

07 July 2016 7,694 5 View

What are the energy values of the electronic levels in Methane molecule?

Hello I need energy values of electronic levels in CH4 molecule from ground state to top (at least first 5 levels). I need only this values and how to determinating is not important. Thank you.

07 July 2016 9,532 2 View

What is the physical reason for anode potential drop in low-pressure glow discharges?

Hello In low-pressure glow discharges, two regions which are close to electrodes have relatively stronge electrical field and potential drops occur in this two regions. What is the physical reason...

05 May 2016 2,615 7 View

How can I convert "µ" unit of pressure to Pa or mm-Hg?

Hello in some literatures pressure unit is "µ" and I want to convert it to Pa or mm-Hg. How can I do it? Thank you

05 May 2016 4,732 1 View

What happened to photons energy?

Hello Assume we have a Stern Gerlach setup which its field is directed toward z direction. A ray of Ag atoms(N atoms) comes out of oven and pass through of our setup. when atoms feel magnetic...

04 April 2016 2,977 3 View

Are there some of quantum measurements based on weak interaction?

Hi I think common quantum measurements are based on electromagnetic interaction and each measurement has at least one EM interaction. Is it true? If we can perform a quantum measurement based on...

07 July 2015 2,689 10 View