• 17 Physical sciences
• 9 Mechanics
• 4 Engineering
• 4 Sound
• 4 Sound-waves
• 4 Wave theory of light
• 4 Waves
• 3 Astronomy
• 2 Materials
• 2 Mechanical engineering
• 1 Biological control systems
• 1 Biology
• 1 Brain
• 1 Central nervous system
• 1 Chemical processes
• 1 Chemical reactions
• 1 Chemistry
• 1 Civil engineering
• 1 Electrical engineering
• 1 Electricity
• 1 Electromagnetism
• 1 Electronics
• 1 Exploration
• 1 Fluid dynamics

• 17 English

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