20 SWG Bare Copper Wire, 140ft Reel (0.91mm Dia) Graduations_100mL the drilled aluminum ball gives

the drilled aluminum ball gives a lightweight contrast to steel and brass balls of the same size in pendulum period and momentum-transfer demonstrations

the candy-bar form letting students break each piece into smaller magnets that retain their own north and south poles

and other biomolecules

this muscular skeleton model features painted muscle origins

with identical volumes across specimens for direct mass-density comparison

20 SWG Bare Copper Wire, 140ft Reel (0.91mm Dia) Graduations_100mL the drilled aluminum ball givesBare 20 SWG copper wire on a 250g reel approximating 140 feet, sized for general purpose coil winding and electromagnet construction at the workhorse gauge of the line.