Question on behalf of my friends

My friend Stephanie is looking at PH.D programs in Physics (Astronomy/Cosmology). How many semesters can she expect to be in class?

My friend Barbara is looking at Sociology MA programs. Would it be considered disingenuous to apply to schools without a terminal MA?

MODERATOR’S NOTE:
Does your friends know that you are posting on their behalf? For many reasons, we do not allow “Asking for a friend” posts here. If they wants to create accounts to ask their own questions, they are welcome to do so. Closing thread.