Resistance Substitution Board, 33Ω - 10MΩ Subcategory_Reflection and Refraction Seventy-times enlarged skin cross section

Seventy-times enlarged skin cross section reveals epidermis

demonstrating mechanical-to-electrical energy conversion as the crank lights the bulb

stackable design

237kg hooked masses for measuring spring extension under load and calculating spring constants

Eight-inch external probe on a 36-inch cord on this handheld digital thermometer

Resistance Substitution Board, 33Ω - 10MΩ Subcategory_Reflection and Refraction Seventy-times enlarged skin cross sectionRotary knob resistance substitution board offering twelve discrete values from 33 ohms to 10M ohms with 4mm lead connections, sized to drop different loads into a circuit without rewiring.