Projection Screen 36 x 48" LabLearner Designed to electrolyze water into

Designed to electrolyze water into separately collected hydrogen and oxygen

the polished 90-45-45-degree faces redirecting light at right angles for total internal reflection demos

Adjustable mass on one fork shifts its 440Hz pitch by a few hertz

sized for individual student-lab use in simple-machines units

easily inclinable surface for dynamic-cart and momentum experiments in mechanics units

Projection Screen 36 x 48" LabLearner Designed to electrolyze water intoWall automatic roll back spring action screens (box type casing), with hooks for mounting on walls and an AUTOMATIC roller mechanism for winding. Wall automatic roll back spring action screens (box type casing), with hooks for mounting on walls and an AUTOMATIC roller mechanism for winding. Size : 36 x 48"