# Physics Taxonomy

## 301 concepts. How far have you gone?

Every node in the physics dependency graph. Teach-back sessions light them up — depth columns show where the prerequisites end.

No concepts explored yet0% solid

0Solid

0Shaky

0Seen

301Not yet

### Mathematical Foundations0/50

**D1**  
M-001 M-002 M-003 M-004 M-005 M-006 M-007 M-010 M-011 M-020 M-021 M-022 M-025 M-030 M-031 M-032 M-036 M-037 M-080

**D2**  
M-012 M-013 M-014 M-023 M-024 M-026 M-033 M-034 M-035 M-038 M-039 M-050 M-051 M-052 M-070 M-071 M-081 M-082

**D3**  
M-040 M-041 M-053 M-054 M-055 M-056 M-059 M-060 M-072 M-073 M-074

**D4**  
M-057 M-058

### Classical Mechanics0/70

**D1**  
P-001 P-002 P-003 P-004 P-005 P-006 P-010 P-011 P-012 P-013 P-014 P-015 P-016 P-017 P-030 P-031 P-032 P-033 P-034 P-035 P-037 P-050 P-051 P-052 P-054

**D2**  
P-007 P-008 P-009 P-018 P-020 P-021 P-022 P-023 P-024 P-025 P-026 P-036 P-038 P-039 P-040 P-053 P-055 P-056 P-057 P-060 P-061 P-062 P-063 P-064 P-065 P-066 P-067 P-070 P-071 P-072 P-073 P-080 P-081 P-082

**D3**  
P-019 P-027 P-068 P-074 P-075 P-090 P-091 P-092

**D4**  
P-093 P-094 P-095

### Thermodynamics0/26

**D1**  
T-001 T-002 T-003 T-004 T-005 T-010 T-020

**D2**  
T-006 T-011 T-013 T-021 T-022 T-023 T-024 T-025 T-026 T-027

**D3**  
T-012 T-014 T-028 T-029 T-030 T-031 T-032

**D4**  
T-033 T-034

### Waves & Acoustics0/12

**D1**  
W-001 W-002

**D2**  
W-003 W-004 W-005 W-006 W-007 W-008 W-009 W-010 W-011

**D3**  
W-012

### Electromagnetism0/49

**D1**  
E-001 E-002 E-003 E-004 E-020 E-021 E-022 E-025

**D2**  
E-005 E-006 E-007 E-008 E-009 E-010 E-011 E-012 E-013 E-014 E-023 E-024 E-026 E-027 E-030 E-031 E-032 E-033 E-036 E-040 E-041 E-042 E-043 E-048 E-056

**D3**  
E-015 E-034 E-035 E-037 E-038 E-044 E-045 E-046 E-047 E-050 E-051 E-052 E-053 E-054 E-055 E-057

### Optics0/13

**D1**  
O-001 O-002 O-004

**D2**  
O-003 O-005 O-006 O-007 O-010 O-011 O-013 O-014

**D3**  
O-012 O-015

### Modern Physics0/49

**D2**  
R-001 R-002 R-003 R-006 Q-001 Q-002 Q-004 Q-005 Q-006 Q-007 A-001 N-001 N-002 N-003 N-004 N-005 N-006

**D3**  
R-004 R-005 R-007 R-008 R-009 Q-003 Q-010 Q-011 Q-012 Q-013 Q-014 Q-015 Q-016 Q-017 Q-018 A-002 A-003 A-004 A-007 N-007 PP-001 PP-002 PP-003

**D4**  
Q-019 Q-020 Q-021 Q-022 Q-023 Q-024 A-005 A-006 PP-004

### Fluid Mechanics0/10

**D1**  
F-001 F-002 F-003

**D2**  
F-004 F-005 F-006 F-010

**D3**  
F-007 F-009

**D4**  
F-008

### Aerospace & Rocketry0/14

**D2**  
AE-001 AE-002 AE-003 AE-004 AE-005

**D3**  
AE-006 AE-007 AE-008 AE-009 AE-010 AE-011 AE-012 AE-014

**D4**  
AE-013

### Difficulty Levels

**D1** Foundations  
**D2** Intermediate  
**D3** Advanced  
**D4** Expert