character: Albert Einstein
topic: Energy-Mass Relationship
grade: 9
subject: Physics
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character: Marie Curie
topic: Radioactivity and Mass Energy
grade: 9
subject: Physics
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character: Isaac Newton
topic: Classical Mechanics and Energy Concepts
grade: 9
subject: Physics
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character: Niels Bohr
topic: Quantum Theory and Energy Levels
grade: 9
subject: Physics
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