I wrote this manual for those students who need a quick guide to their studies in Physics. This manual is not itself a textbook, but contains all the equations and formulas needed to solve problems of classical and modern physics. With the help of a tutor or teacher, it is a powerful ally to achieve good results in your physics courses. I have tried to cover all the topics of physics from high school to early college courses. I wish you a lot of success in your studies and don’t forget to enjoy the pleasure of learn physics.