Balancing Lever Kit, Class Pack of 5 Heat & Thermodynamics_Energy Transfer & Engines LED-output photoelectric cell on a

LED-output photoelectric cell on a 3

5cm outer diameter

a smaller-range counting tool for introductory arithmetic and place-value work

and 26 SWG - sized as the matched replacement set for the PH0730 sonometer

paired with sphere and cylinder counterparts to extend the electrostatic-curvature comparison up the size scale

Balancing Lever Kit, Class Pack of 5 Heat & Thermodynamics_Energy Transfer & Engines LED-output photoelectric cell on aFive lever balancing class pack with 600mm plywood levers, 4 fulcrum triangles, and 40 metal masses matched to 1%, deliberately using non standard graduations to build empirical reasoning.