character: Dr. Johnson
topic: Stress and Strain: Basics of Material Science
grade: 9
subject: Physics
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character: Dr. Smith
topic: Understanding Elasticity in Materials
grade: 9
subject: Physics
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character: Ms. Adams
topic: The Role of Fracture Mechanics in Physics
grade: 9
subject: Physics
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character: Mr. Lee
topic: Introduction to Young's Modulus and its Applications
grade: 9
subject: Physics
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