character: Dr. Smith
topic: Introduction to Hydraulics
grade: 9
subject: Physics
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character: Professor Johnson
topic: Basic Principles of Fluid Mechanics
grade: 9
subject: Physics
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character: Ms. Lee
topic: Applications of Hydraulics in Engineering
grade: 9
subject: Physics
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character: Mr. Patel
topic: Fluid Dynamics and Pressure Systems
grade: 9
subject: Physics
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