One of the most important goals that we all strive to reach is to have a good future which can be achieved merely through knowledge and science. Mathematics and sciences are the foundations of technology and development in each society. The more time and energy is spent on these areas, the more prosperous the society will be. The most important way of improving and thinking correctly at the beginning of this path is to solve different problems of school lessons to get fully prepared for new projects. This collection is a small part of a complete training program implemented to achieve this goal. This program is intended to provide users with thousands of exam questions with fully descriptive answers. In this regard, the program starts with physics. Currently, the collection includes hundreds of final exam and mid-term questions with fully descriptive answers which were intended to be completely self-tutorial without needing other sources. However, this is not an utterly correct claim, and students should consult with comprehensive textbooks to have a more accurate perspective. The individuals who are preparing for GRE Subject exams in physics can make the most of this collection. The very low cost which you pay to use this collection is merely spent producing content and developing it more. We are at the beginning of a long path to become a comprehensive training location in order to solve the problems of school lessons in all the scientific subjects; therefore, we would be really happy to be reminded of our shortcomings and mistakes so that we can achieve our goal in the foreseeable future. Since this collection includes exam questions, many of them were probably selected from different textbooks which were really hard to specify. The students are kindly asked to send us the details in case they know a reference to a question so that we can make corrections in next volumes.
1) Unlike many similar websites, this collection does not include the answers to textbook exercises. It includes questions and answers selected from final exams. Therefore, it is a good source for preparation for exams.
2) All the questions and answers were designed and typed with high precision and quality.
3) All the questions are weekly revised, and possible errors are corrected to make the previous answers more perfect (if necessary).
4) This collection is a very good source for preparation for GRE Subject exams.