character: Mr. Smith
topic: Mechanical Properties of Materials
grade: 9
subject: Physics
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character: Mrs. Johnson
topic: Stress and Strain in Materials
grade: 9
subject: Physics
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character: Dr. Lee
topic: Elasticity and Plasticity
grade: 9
subject: Physics
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character: Ms. Garcia
topic: Young's Modulus and its Applications
grade: 9
subject: Physics
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