Electric Motor Demonstration with 2, 3, and 4 Pole Armatures Biology_Human Anatomy Hand-driven Newton's color disc that

Hand-driven Newton's color disc that spins seven painted segments fast enough to merge into apparent white through persistence-of-vision and additive color mixing

this eight-fork steel set lets students hear and measure frequency

and optic nerve

packaged with carbons

Eight aluminum-shank tuning forks tuned to scientific pitch (C4 = 256Hz) and ranging from 5 9/16 to 7 1/8 inches

Electric Motor Demonstration with 2, 3, and 4 Pole Armatures Biology_Human Anatomy Hand-driven Newton's color disc thatCompares 2 , 3 , and 4 pole armature configurations on the same motor frame by swapping interchangeable enameled copper armatures past a permanent bar magnet on a disc commutator.