HookS Law Spring Set, Set Of Five Different Springs Constants, The Set Has Five Different Springs Constants For In Depth Investigation With Above HookS Law Apparatuses.
Ray box, simple, safe and sturdy source of projected light for many classic optics experiments, produces parallel convergent rays across a plane horizontal surface and the rays are intense enough to be traced in natural light. Built in solid aluminum extrusion casing, 100-240V 50/60 Hz
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