Digital TapWater Tour, Classroom investigation of how and why the characteristics of tap water can vary and affect everyday activities, Background information, test materials included for pH, chlorine, hardness, copper, iron, With Instructor, Student Manuals
Differential Model, permits the instructor and student to manually turn the handle and apply a load to the transparent wheels to demonstrate the differential mechanism, permits power from the engine to be transmitted to a pair of driving wheels.
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