Plano-Cylindrical Concave Lens, +17 Diopter, 50 x 50mm Science at Home_Life Science the shared mass isolating volume

the shared mass isolating volume and density as the distinguishing variables across metals and polymers

Sectional 3D plant cell model exposes cell wall

Compact 150mm black 4mm-stackable lead with nickel-plated split-hollow pins

Heavy-gauge steel inclined plane with built-in vertical

and 50mm wheel diameters in open-sided frames

Plano-Cylindrical Concave Lens, +17 Diopter, 50 x 50mm Science at Home_Life Science the shared mass isolating volumePlano cylindrical lens at 50 by 50mm with 17 diopter optical power and ground polished edges, the cylindrical curvature focusing light to a line rather than a point in optics demos.