Hair Hygrometer, 105mm Diameter Lab Supplies_Filtering Supplies this 500mm black lead pairs

this 500mm black lead pairs a 4mm plug at one end with a crocodile clip at the other

Proves horizontal velocity does not affect vertical fall time through a push-button launcher that simultaneously projects one steel ball and releases another

and ring magnets with plotting compasses

Demonstrates electromagnetic induction and Faraday's law by stepping DC input into 25mm high-voltage sparks across adjustable electrode rods on an open chassis

applied force

Hair Hygrometer, 105mm Diameter Lab Supplies_Filtering Supplies this 500mm black lead pairsMetal cased hair hygrometer on a 105 mm dial reading 0 to 100 percent relative humidity in 1 percent divisions through hair fiber response, running battery free for direct room condition reads.