Physics [8000-8053]
- 8001 - Attraction
- 8002 - Capacitor
- 8003 - Chemical Reaction
- 8004 - Circuit
- 8005 - Collision
- 8006 - Comparison
- 8007 - Cosmological Models
- 8008 - Electrical Current
- 8009 - Delta
- 8010 - Diode
- 8011 - Direction
- 8012 - Elect. Constants
- 8013 - Elect. Resistance
- 8014 - Electrical Polarity
- 8015 - Electrical Storage
- 8016 - Electronegativity
- 8018 - Energy
- 8019 - Entity
- 8020 - Entropy
- 8021 - Entropy (Anim.)
- 8022 - Equivalence principle
- 8023 - Field line
- 8024 - Interference
- 8025 - Location
- 8026 - Lorentz Factor
- 8027 - Nuclear Energy
- 8028 - Ohm's Law
- 8029 - Optics
- 8030 - Passage of Time
- 8031 - Period
- 8032 - Polarity
- 8033 - Position
- 8034 - Power Factor
- 8035 - Quantum Space
- 8036 - Semiconductor
- 8037 - Signal
- 8038 - Sinusoid
- 8039 - Space-Time
- 8040 - Special Relativity
- 8041 - Speed
- 8042 - State of Matter
- 8043 - Temperature
- 8044 - Temperature Scales
- 8045 - Transition
- 8046 - Transmittance
- 8047 - Waves
- 8048 - Wiring
- 8049 - Wiring (Switched)
- 8050 - Hooke's Law
- 8051 - Passive Elements
- 8052 - Phase Shift
- 8053 - Current Type