Save $20
on any order of $599+
Save $30
on any order of $999+
Save $50
on any order of $1499+
View All Coupon Codes
This item qualifies for Free Ground...
Set of two black rubber balls, each 1-3/8" in diameter, appear to be identical in terms of appearance and mass but are manufactured from different types of rubber. When dropped on a hard surface from an equal height, the happy ball bounces high and the sad ball barely bounces at all. The happy ball also rolls faster than the sad ball. Provides an interesting and memorable demonstration for studying elasticity, kinetic energy, and polymer composition.
We aim to show you accurate product information. Here you will find what the manufacturers have provided us with. See our disclaimer.
* Free Ground Shipping within the continental U.S. only (excludes Alaska, Hawaii, PO Boxes and APO/FPO addresses).
Note: Please read description carefully. Do not base your order on the picture presented.