Standard Rheostat, 2.5Ω, 9A Max Science at Home producing oxygen's characteristic emission lines

producing oxygen's characteristic emission lines for spectroscope viewing of atomic-emission and quantum-energy levels

Cork-lined two-prong jaws on a 5

Removable full-term fetus sits within a numbered female pelvis

and vascular tissue at greatly magnified scale

hand-cranked so students trace how shifter engagement alters gear ratios and output torque selection

Standard Rheostat, 2.5Ω, 9A Max Science at Home producing oxygen's characteristic emission linesStandard rheostat at 2. 5 ohms and 9A with oxidized constantan winding on a vitreous enameled tube and three binding posts, supporting both rheostat and potentiometer wiring at high current.