character: Mr. Lee
topic: Mechanical Properties of Solids
grade: 9
subject: Physics
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character: Ms. Jones
topic: Stress and Strain in Materials
grade: 9
subject: Physics
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character: Dr. Smith
topic: Elasticity and Plasticity of Solids
grade: 9
subject: Physics
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character: Mr. Chang
topic: Fracture Mechanics in Solids
grade: 9
subject: Physics
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