Half-Size Human Circulatory System Model, Compact Gifts_Bar Walks students through four-stroke diesel

Walks students through four-stroke diesel operation on a 16-inch hand-cranked model

5 newtons for measuring small forces during spring-law and tension-force classroom investigations

this acrylic light guide traps an injected ray-box beam by total internal reflection

Meker-style natural gas burner delivers a broad

fanning apart visibly when a charged rod approaches to demonstrate electrostatic repulsion and induction

Half-Size Human Circulatory System Model, Compact Gifts_Bar Walks students through four-stroke dieselSized for compact classroom display, the half size circulatory model traces arterial and venous pathways from heart to peripheral capillaries.