really useful videos
comment on Photons and Photo Electric Effect 01: Einstein's mass energy equivalence well explaination
sir aap bhaut aacha padhate ho
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nice lecture sir. now i am interested in organic chemistry.
Great method of teaching. sir you are making such difficult topic so easy. thanks a lot sir.
excellent vedio sir
Verry help full...bahot khub...thnks mem...
nice video sir
doing great job well done
you teaches very well mam