Moment of Inertia Disc on Magnetic Base Handle Type_Wood a battery-free source of partial

a battery-free source of partial vacuum for bell-jar demonstrations without external power

Greatly magnified Paramecium model reveals cilia arrangement

and 500mm focal lengths for comparative refraction experiments

verifying vector-addition rules in introductory mechanics units

5-inch female pelvis model demonstrates 9-month pregnancy anatomy and fetal positioning before delivery for obstetrics teaching

Moment of Inertia Disc on Magnetic Base Handle Type_Wood a battery-free source of partial6. 5 inch plastic moment of inertia disc on a magnetic base ball bearing, perforated at 1cm intervals along 12 axes with six moveable pins for torque and rotational energy investigations.