It depends on the school you go to.
At a liberal arts university, you will probably have to take a good deal of GE humanities/sociology/arts credits along with all of your physics courses.
At a university which does not focus on liberal arts, the GE requirement may be less.
For instance I am a physics major at a medium sized Jesuit liberal arts University.We make it into the Northeast Top 10 Undergraduate Universities list in US News and World Report every year. The university is not elite, but it is known. My university also focuses HEAVILY on liberal arts education. I had to take 9 credits of philosophy, 6 of history,6 of foreign language.humanities, 6 of sociology, etc. along with all of my physics math and engineering courses.
So, yes, a school could require humanities and GE courses along with physics.
For my classical mechanics class( by which I am assuming you are talking about a 300 level mechanics class, not an intro mechanics class), we met 3 days a week for an hour for one semester.
My 200 level "Modern Physics" course was one semester for 3 hours a week lecture.
My 400 level E&M courses covered two semesters with 3 one hour lectures a week.
My Quantum course was one required semester (300 level) with a second semester (400 level) as an optional physics elective, which I am taking now.
There are other physics courses that I had to take, but this should be enough to give you an idea of how my school runs it's physics courses. Whether my school falls under your definition of "reputable" i do not know, but it should give you some idea of university physics courses and what else may be required of you.