Physics Part 4 is about gasses. It’s a continuation course for those who have met at least 1 of the following:
- Completed both Physics Part 1 (Forces) and Physics Part 2 (Waves).
- Complete Immersive Chemistry Second Semester (live or pre-recorded).
Note that you don’t have to take Physics Part 3 about electricity to take this course. The Physics 3 topics about electricity are not necessary for this course.