Projection Screen 36 x 48" LabLearner Adjustable mass on one fork

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

tapered spout

5 inch base with a two-tension-setting spring gun and visible internal components

Designed to grip a wide variety of optical components on standard bench rails

paired with 4mm sockets so iron-filing patterns can be mapped around a current-carrying conductor for Oersted's experiment

Projection Screen 36 x 48" LabLearner Adjustable mass on one forkWall 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"