Physics is a subject that studies the natural world and its physical properties. It is a branch of science that deals with the study of matter, energy, and their interactions. The two crossword solutions for the term 'Physics Subj.' are 'ELECT' (5 letters) and 'ELEC' (4 letters). ELECT stands for 'ELECTRICITY, ' which is the study of the behavior and properties of electric charge and electric fields. ELEC stands for 'ELECTRICITY and Electronics, ' which is the study of the behavior and properties of ELECTRICITY and its applications in electronics.