I hope you are all doing well! This is Mohamed Abdelhafez, a physics grad student @ the University of Chicago. As ETS recently released a new physics GRE test (GR1777) https://www.ets.org/s/gre/pdf/practice_book_physics.pdf, I have written down full solutions for it as part of a course I was teaching and you can find them here : http://home.uchicago.edu/~abdelhafez/pgre.php
I decided to share them as a tribute to this site and fellow sites that helped me a lot in my applications!
Please let me know if you have any comments/corrections, and best of luck to all of you who are starting this long journey of applying to physics PhD! Also, feel free to send me questions you have regarding grad life etc.