PSI Physics

Hi everyone!

I'm translating a text about physics and I came across this noun phrase: "PSI Physics" (it's a quiz regarding conservation of energy.)

Might it be pounds per square inch?

Thanks!

Yes. It makes sense and it is the right abbreviation.

Thanks, Helenwar!

Anyway, now I'm thinking it might have something to do with a book I found on the Internet, which is called PSI Physics, since this noun phrase comes after the title of many Physic Quizzes. It can be some kind of reference, right?

It is difficult to say without having the complete paragraph. Sorry...