We have not "since experimental" phrase in english! we have "experimental sience 

and you must use whose instead of who 's!

you should say " whose major is experimental science?

 So, after founding the question, chemistsry was explained one of the most experimental science.  It has many experimnets which don't need expensive facilities.

Onthe other side, physics is experimental sience too.But,it needs many costly equipments.Of course,these are diffrent and all of other experiments are based on these two field of science like engeener, some part of nature science and so on.

no dear

i ment

che kasi reshtash since experimentale

Electrical engineering- Telecommunication engineering- Mechanical engineering.