What Is Something in the World Today That Is Like the Sliding Filament Theory?

Please explain how an object/machine is like the sliding fliament theory so I can better understand it..

Please explain how an object/machine is like the sliding fliament theory so I can better understand it..

Hi, I am a Materials Science and Engineering PhD student in a prestigious university in US. But I really want to get into business world after Ph.D. I am kinda confused what to do? Can anyone give some suggestions, like what is the baby step to really get started this dream? What is the advantage of materials science and engineering major student to do that? What is the disadvantages?For an engineering background student, what is especially important and challenging for him to interview with a business examiner?Thanks, guys.