Double Concave Glass Lens, 50mm Diameter, 250mm Focal Length, 4mm Thick Subcategory_Inorganic Compounds Long 1000mm black 2mm-plug lead

Long 1000mm black 2mm-plug lead with a crocodile clip on the opposite end

14 push buttons

Class-visible 12-inch demonstration meter with magnetically damped moving coil and Perspex front-and-back panels

0 Type-B to Type-B cable connects data-logging sensors

letting students directly observe pressure-volume changes under stacked weights

Double Concave Glass Lens, 50mm Diameter, 250mm Focal Length, 4mm Thick Subcategory_Inorganic Compounds Long 1000mm black 2mm-plug leadDouble concave glass lens at 50mm diameter and 250mm focal length on a 4mm thick blank, the diverging curvature softening divergence for subtler virtual image reduction in optics work.