Multiphysics

Multiphysics means having more than one type of physics at the same time. It is like having two or more different kinds of science (like chemistry and physics) happening together. For example, if you wanted to know why a car moves, you would need to include both physics (like momentum and force) and chemistry (like what kind of fuel is being used). Together, these things make a multiphysics picture of how a car works.