character: Alice
topic: Applications of Heat Transfer in Refrigeration
grade: 12
subject: Physics
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character: Bob
topic: Thermodynamics in Refrigeration Systems
grade: 12
subject: Physics
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character: Charlie
topic: Principles of Heat Exchange in HVAC
grade: 12
subject: Physics
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character: Diana
topic: Phase Changes and Heat Transfer in Refrigerants
grade: 12
subject: Physics
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