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| Deletions are marked like this. | Additions are marked like this. | 
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| Mechanics | === Mechanics === | 
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| ||1A-Measurement|1C-Motion in One Dimension|1D. Motion in Two Dimensions|1E-Relative Motion|| ||1F-Newton's First Law|1G-Newton's Second Law|1H-Newton's Third Law|1J-Statistics of Rigid Bodies|| ||1K-Applications of Newton's Laws|1L-Gravity|1M-Work and Energy|1N-Linear Momentum|| ||1Q-Rotational Dynamics|1R-Properties of Matter| | || | ||1A-Measurement||1C-Motion in One Dimension||1D. Motion in Two Dimensions||1E-Relative Motion|| ||1F-Newton's First Law||1G-Newton's Second Law||1H-Newton's Third Law||1J-Statistics of Rigid Bodies|| ||1K-Applications of Newton's Laws||1L-Gravity||1M-Work and Energy||1N-Linear Momentum|| ||1Q-Rotational Dynamics||1R-Properties of Matter|| || || | 
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| Fluid Mechanics | === Fluid Mechanics === | 
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| 2A-Surface Tension 2B-Statics of Fluids 2C-Dynamics of Fluids | ||2A-Surface Tension||2B-Statics of Fluids||2C-Dynamics of Fluids|| || | 
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| 3A-Oscillations 3B-Wave Motion 3C-Acoustics 3D-Instruments 3E-Sound Reproduction | ||3A-Oscillations||3B-Wave Motion||3C-Acoustics||3D-Instruments|| ||3E-Sound Reproduction|| || || || | 
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| 4A-Thermal Properties of Matter 4B-Heat and the First Law 4C-Change of State 4D-Kinetic Theory 4E-Gas Law 4F-Entropy and the Second Law | ||4A-Thermal Properties of Matter||4B-Heat and the First Law||4C-Change of State||4D-Kinetic Theory|| ||4E-Gas Law||4F-Entropy and the Second Law|| || || | 
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| 5A-Electrostatics 5B-Electric Fields and Potential 5C-Capacitance 5D-Resistance 5E-Electromotive Force and Current 5F-DC Circuits 5G-Magnetic Materials 5H-Magnetic Fields and Forces 5J-Inductance 5K-Electromagnetic Induction 5L-AC Circuits 5M-Semiconductors and Tubes 5N-Electromagnetic Radiation | ||5A-Electrostatics||5B-Electric Fields and Potential||5C-Capacitance||5D-Resistance|| ||5E-Electromotive Force and Current||5F-DC Circuits||5G-Magnetic Materials||5H-Magnetic Fields and Forces|| ||5J-Inductance||5K-Electromagnetic Induction||5L-AC Circuits||5M-Semiconductors and Tubes|| ||5N-Electromagnetic Radiation|| || || || | 
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| 6A-Geometrical Optics 6B-Photometry 6C-Diffraction 6D-Interference 6E-Interference 6F-Color 6H-Polarization 6J-The Eye 6Q-Modern Optics | ||6A-Geometrical Optics||6B-Photometry||6C-Diffraction||6D-Interference|| ||6E-Interference||6F-Color||6H-Polarization||6J-The Eye|| ||6Q-Modern Optics|| || || || | 
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| 7A-Quantum Effects 7B-Atomic Physics 7D-Nuclear Physics 7E-Elementary Particles 7F-Relativity | ||7A-Quantum Effects||7B-Atomic Physics||7D-Nuclear Physics||7E-Elementary Particles|| ||7F-Relativity|| || || || | 
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| 8A-Planetary Astronomy 8B-Stellar Astronomy 8C-Cosmology | ||8A-Planetary Astronomy||8B-Stellar Astronomy||8C-Cosmology|| | 
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| 9A-Support Systems 9B-Electronic 9C-Mechanical | ||9A-Support Systems||9B-Electronic||9C-Mechanical|| | 
PIRA Classification Scheme
PIRA stands for the Physics Instructional Resource Association, partially supported by the American Association of Physics Teachers. Support the AAPT!
Mechanics
| 1A-Measurement | 1C-Motion in One Dimension | 1D. Motion in Two Dimensions | 1E-Relative Motion | 
| 1F-Newton's First Law | 1G-Newton's Second Law | 1H-Newton's Third Law | 1J-Statistics of Rigid Bodies | 
| 1K-Applications of Newton's Laws | 1L-Gravity | 1M-Work and Energy | 1N-Linear Momentum | 
| 1Q-Rotational Dynamics | 1R-Properties of Matter | 
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Fluid Mechanics
| 2A-Surface Tension | 2B-Statics of Fluids | 2C-Dynamics of Fluids | 
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Sound, Oscillations, and Waves
| 3A-Oscillations | 3B-Wave Motion | 3C-Acoustics | 3D-Instruments | 
| 3E-Sound Reproduction | 
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Thermodynamics
| 4A-Thermal Properties of Matter | 4B-Heat and the First Law | 4C-Change of State | 4D-Kinetic Theory | 
| 4E-Gas Law | 4F-Entropy and the Second Law | 
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Electricity and Magnetism
| 5A-Electrostatics | 5B-Electric Fields and Potential | 5C-Capacitance | 5D-Resistance | 
| 5E-Electromotive Force and Current | 5F-DC Circuits | 5G-Magnetic Materials | 5H-Magnetic Fields and Forces | 
| 5J-Inductance | 5K-Electromagnetic Induction | 5L-AC Circuits | 5M-Semiconductors and Tubes | 
| 5N-Electromagnetic Radiation | 
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Optics
| 6A-Geometrical Optics | 6B-Photometry | 6C-Diffraction | 6D-Interference | 
| 6E-Interference | 6F-Color | 6H-Polarization | 6J-The Eye | 
| 6Q-Modern Optics | 
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Modern Physics
| 7A-Quantum Effects | 7B-Atomic Physics | 7D-Nuclear Physics | 7E-Elementary Particles | 
| 7F-Relativity | 
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Astronomy
| 8A-Planetary Astronomy | 8B-Stellar Astronomy | 8C-Cosmology | 
Equipment
| 9A-Support Systems | 9B-Electronic | 9C-Mechanical |