Description
line-focus
Wooden fulcrum-balance simple-machine model with a sliding pivot
and internal organelles for detailed protist biology teaching
Suspends a 20mm solid brass cube from spring scales for Archimedes'-principle and buoyancy measurement
Round Convex Glass Mirror, 75mm Diameter, 200mm Focal Length Material_Steel line-focusConvex glass mirror at 75mm diameter and 200mm focal length, ~3. 1mm thick, the longer focal value softening divergence and producing a wider apparent field through reduced virtual reflections.
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