8980physicsPT0000-00-00 00:00:00BT10225physical sciencesPTNT10590acousticsPTNT11297astrophysicsPTNT10592electricityPTNT11335electromagnetismPTNT8977field theory (physics)PTNT8996geophysicsPTNT10594magnetismPTNT10599mathematical physicsPTNT10248mechanicsPTNT11332modern physicsPTNT10395opticsPTNT10598quantum physicsPTNT10601solid state physicsPTNT10600statistical physicsPTNT10596thermodynamicsPTRT11694philosophy of physicsPTRT11305chaos theoryPTRT11318cosmologyPT