Diffusion - Coefficients and Non Steady State

[@lawofrobotics]

Definitely one of the best videos I've seen on this topic. Thank you.

[@pradipdalui5008]

My concept totally cleared and I can solve all problems related diffusion in solids easily after viewing your video sir,,I really very much help from your class,wish your long life sir

[@kawsarchowdhury1822]

how did you get erf(z)=0.8125??????

[@Arthanzar]

In the equation for D at ~ 2:22, you didn't define "e" or "pre-exponential." Please define these.

[@sajakareem8277]

Please can you explain the pesudo steady-state time equation?

[@JamesVestal-dz5qm]

I explained this to my dad while we went for a walk yesterday morning.

[@nehauk9314]

Qd is fixed?

[@AncientLoaf]

sorry, maybe i'm confused or something but this was very unclear explanation. when you show us how to solve for D (inital). you didn't mention in the video that you had to multiply the boltzmann constant by avagadros number and i still don't know where you got 573k from.

[@rsts32]

He just converted from Celsius to Kelvin :D

[@jeffbirt6671]

Sorry for the confusion. I mistakenly used k when I should have used R, the gas constant, which is the Boltzman constant multiplied by Avogadro's number. I do use the gas constant when I first introduce the formula at 2:34.
Raniel is right about the Kelvins. Thanks!

[@boxiao6586]

Thanks professor. I have a question, could you tell me the diffusion coefficient of Cu in ferrite steel?

[@ajs8194]

Thanks for helping me solve my assignment ;)

[@shubhamkumaryadav3531]

sir, voice is low, i cant hear

[@EngineeringandDesignSolutions]

You might check your hardware or software. No one else has had this problem.

[@eanrobertson3689]

@@EngineeringandDesignSolutions Everyone else does have this problem

[@fouadj1893]

Wow i actually learned something
Thank you so much

[@qasimtanoli26]

thank you it was really helpful video

[@patrickdouglas5459]

I think you got some work to do with the sound

[@fs8566]

Thank you so much sir..

[@Pattelito]

Thank you! this helped me alot :)

[@EngineeringandDesignSolutions]

No problem! Thanks for posting!

[@mmolokimotlhobogwa5983]

thank you

[@yosefputera4266]

Thanks, man!

[@jeffbirt6671]

You are welcome! Thanks for watching and commenting!

[@ادونيوتوتي]

Thanks so much

[@EngineeringandDesignSolutions]

No problem! Thanks for posting!

[@sloom121]

Thanks

[@EngineeringandDesignSolutions]

You are welcome!