Hand-Painted 3D Starfish Sectional Anatomical Model on Base, 18 x 16 inch Light & Optics_Spectroscopy demonstrating mechanical advantage as the

demonstrating mechanical advantage as the angle of incline changes the effort needed to roll the cart up the slope

Copper-block plug key switch with two 4mm terminals and a removable plastic-guarded plug

Used to produce concentric Newton's rings under monochromatic light

Graphite lattice kit whose atoms and connecting rods assemble into planar carbon sheets

Open back reveals spine and posterior musculature while the head section preserves upper-body context

Hand-Painted 3D Starfish Sectional Anatomical Model on Base, 18 x 16 inch Light & Optics_Spectroscopy demonstrating mechanical advantage as theThree dimensional starfish sectional model reveals echinoderm anatomy, water vascular system, and radial symmetry for marine biology teaching.