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| PIRA stands for the Physics Instructional Resource Association, partially supported by the American Association of Physics Teachers. Support the AAPT! | PIRA stands for the Physics Instructional Resource Association, partially supported by the American Association of Physics Teachers. Join the [AAPT! http://www.aapt.org] | 
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| ===Mechanics=== | === 1. Mechanics === | 
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| ===Fluid Mechanics=== | === 2. Fluid Mechanics === | 
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| Sound, Oscillations, and Waves | === 3. Sound, Oscillations, and Waves === | 
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| Thermodynamics | === 4.Thermodynamics === | 
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| Electricity and Magnetism | === 5. Electricity and Magnetism === | 
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| Optics | === 6. Optics === | 
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| Modern Physics | === 7. Modern Physics === | 
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| Astronomy | === 8. Astronomy === | 
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| Equipment | === 9. Equipment === | 
PIRA Classification Scheme
PIRA stands for the Physics Instructional Resource Association, partially supported by the American Association of Physics Teachers. Join the [AAPT! http://www.aapt.org]
1. 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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2. Fluid Mechanics
| 2A-Surface Tension | 2B-Statics of Fluids | 2C-Dynamics of Fluids | 
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3. Sound, Oscillations, and Waves
| 3A-Oscillations | 3B-Wave Motion | 3C-Acoustics | 3D-Instruments | 
| 3E-Sound Reproduction | 
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4.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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5. 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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6. 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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7. Modern Physics
| 7A-Quantum Effects | 7B-Atomic Physics | 7D-Nuclear Physics | 7E-Elementary Particles | 
| 7F-Relativity | 
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8. Astronomy
| 8A-Planetary Astronomy | 8B-Stellar Astronomy | 8C-Cosmology | 
9. Equipment
| 9A-Support Systems | 9B-Electronic | 9C-Mechanical |