Replacement Pith Balls for Electroscope, 10-Pack Subcategory_Pressure and Gas Laws this Van de Graaff generator

this Van de Graaff generator delivers spark-producing high-voltage demonstrations in the physics classroom

and hinge-distance scales adjustable from 0 to 45 degrees

Plastic-bodied wave apparatus with eccentric discs that drive metal rods up and down as the handle turns

delivering wheel-driven power to a lamp or a Newton color disc

and single-celled organism structure for protist biology teaching

Replacement Pith Balls for Electroscope, 10-Pack Subcategory_Pressure and Gas Laws this Van de Graaff generatorSpare pack of ten low mass pith balls sized for the standard pith ball electroscope, supplying replacements when the originals lose loft or split during repeated charging cycles.