Hall's Friction Car Base Shape_Rectangular with lengths varying by density

with lengths varying by density to isolate the mass-volume-density relationship for student investigation

packaged in a hard plastic case with standard-size pieces

Optically-worked glass double convex lens with a 150mm focal length and 1

supporting both additive and subtractive color demonstrations in optical box setups

Hundred-fourteen-piece organic chemistry molecular model set with 50 atoms and 64 links covering single

Hall's Friction Car Base Shape_Rectangular with lengths varying by densityMolded in one piece with sleeve bearing wheels, a central mass well, and a removable cord post, this Hall's car supports dynamics work on inclined planes with weights and pulleys.