US$ 16.00
and motion experiments
Pairs 50mm of aperture with a 200mm focal length on a convex glass surface
5 newtons for measuring small forces during spring-law and tension-force classroom investigations
and zinc supports density and specific-heat work
3/4" Plastic Marbles, 5-Pack Lab Supplies_Classroom and motion experimentsFive pack of 3 4 inch plastic marbles, providing lightweight projectiles for collision and ramp experiments where steel or glass would carry too much momentum or break on impact.
US$ 16.00
US$ 48.00
US$ 14.00