Answer:
Fluid mechanics (dynamics)
Explanation:
The topic Aerospace Engineers and Marine Engineers has to do with the (common) environment of the equipment Aerospace Engineers and Marine Engineers work with which are air (gas) and water (liquid) both of which are classes of fluids
Therefore, the common topic shared by both professions is fluid mechanics which has branches of fluid statics (fluids at rest) , fluid kinematics (fluid having motion), fluid dynamics (the interaction of fluids in motion, and forces acting on them)
Given that both professions have energized equipment exerting forces in moving fluids, their common topic of knowledge is fluid dynamics
Fluid mechanics is a branch of physics, which is a branch of natural science which is one of the eight areas of knowledge.
