Aluminum Spring Balance Dynamometer Included_Outlet Wood-based friction board apparatus with

Wood-based friction board apparatus with a 19-inch metal surface plus two hooked friction sliders with different top materials for comparative sliding-friction investigations

supplying spares so optics demonstrations of reflection and refraction continue once the original burns out

the optical-quality body delivering clean dispersion for refraction

Hand-cranked Van de Graaff generator with a 9

Aluminum Spring Balance Dynamometer Included_Outlet Wood-based friction board apparatus withAluminum bodied spring balance delivers corrosion resistant force measurement across repeated classroom use, with a printed scale for direct gram and Newton reading.