Electrostatic Pompon Set Light & Optics_Spectroscopy Enlarged mandible model exposes lower

Enlarged mandible model exposes lower jaw teeth

letting students measure rotational distance against linear advance to derive the mechanical advantage of the spiral

Needle valve and flame stabilizer deliver fine flame control on this liquid propane Bunsen burner for precision chemistry and biology heating work

Parallelogram-of-forces apparatus on a 26 by 20 inch wall-mountable board with two clamp-on pulleys

Electrostatic Pompon Set Light & Optics_Spectroscopy Enlarged mandible model exposes lowerPair of nylon fringed metal pompons on insulated stands that fan into wide cones under mutual repulsion when charged, dramatizing Coulomb repulsion and charge distribution on conductors.