Happy and Sad Balls are used to show the relationship between elastic and inelastic collisions.
Both balls look the same, have same mass and same density. However, one will bounce, while the other will not!
What is the secret?
The Happy Ball consists of standard neoprene that has low hysteresis, low surface friction, and weak intermolecular forces.
The Sad Ball consists of Norsorex that has high hysteresis, high suface friction, and stronger intermolecular forces.
Included: one Happy Ball and one Sad Ball.
These ear plugs are made of self adjusting foam that provides a comfortable, low pressure fit and excellent sound filtration.
Durable, anti-fog safety glasses that fit comfortably on any head size.
These goggles meet the ANSI Z87.1, 2010 High Impact standards.
Recommended for protection against chemical splashes. A must have for every young chemist!
Extra thick medical examination gloves - 60mil. Great for extra protection.
Extra-small nitrile exam gloves designed and manufactured for superior protection against viral, bacterial, and certain chemical hazards.
This black scorpion specimen is great for the classroom setting!
A massive mounted set of 100 rocks and minerals found in the US,
Working model representing the sun, earth, and moon and their relationships.
Build a robot that's an artist too!
Ever wonder how to survive in the wilderness? These cards can help!
This is a classic demonstration toy of the powers of magnetic fields!
At xUmp.com you will find a large selection of scientific products carefully curated by real scientists and educators. We sell everything from educational toys, teacher supplies for science classroom, lab equipment, science toys, science fair supplies, classroom equipment, chemistry glassware, chemistry lab equipment, physics demos, electronics supplies, robots, science kits to geeky science gifts.