US$ 499.00
and projectile-launcher kits
and 0-500mV at plus-or-minus 2
Set of 20 different alloys supplied in wooden case with glass top
the lightweight body producing virtual upright reduced images for safer per-desk divergence demonstrations
numerous stamens
Wooden Friction Block with Felt Surface, 6 x 3 x 1.25" Face Size_63mm and projectile-launcher kitsPine wooden friction block at 6 by 3 by 1. 25 inches with felt on one face, a C hook at one end, and dual surfaces for comparative coefficient of friction measurement against spring scales.
US$ 499.00
US$ 169.00
US$ 149.00
US$ 174.50
US$ 149.50
US$ 227.50