HL:
TZ1: https://www.reddit.com/r/IBO/comments/8ivxlz/exam_discussion_physics_hl_paper_3_tz1/
TZ2: https://www.reddit.com/r/IBO/comments/8ivxmn/exam_discussion_physics_hl_paper_3_tz2/
SL:
TZ1: https://www.reddit.com/r/IBO/comments/8ivxna/exam_discussion_physics_sl_paper_3_tz1/
TZ2: https://www.reddit.com/r/IBO/comments/8ivxou/exam_discussion_physics_sl_paper_3_tz2/