Brass Slotted Mass Set with Hanger, 9 x 100g (1000g Total) Subcategory_Temperature and Heat Shopping for someone else but

Shopping for someone else but not sure what to give them

visualizing sound-transmission dependence on a medium

Hand-cranked pulley steps up to a smaller dynamo pulley through a rubber belt

Hand-cranked to convert mechanical work into electrostatic energy

Fitted with independent air and gas adjustments plus a brass flame stabilizer tip

Brass Slotted Mass Set with Hanger, 9 x 100g (1000g Total) Subcategory_Temperature and Heat Shopping for someone else butBrass nine piece 100 gram slotted mass set with a 100 gram hanger, each disc 37 mm in diameter and 11 mm thick, totaling 1000 grams for force, pressure, and pulley investigations in physics.