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  Q1: Modulus of Elasticity,
      Deflection of a beam,
      Inertial balance


  Q2: Blackboard Mechanics:
      - Pullies, Levers, Inclined
         planes






   Q3: Chalkboard globe,
      Mass buoyancy demo,
      Drinking bird,
      Sound in a vacuum









  Q4: Center of Mass shapes,
      Pingpong cannon vacuum,
      Pingpong cannon stand,
      Sledge hammer