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 premium 5mil medical-grade Nitrile Exam Gloves are designed and manufactured for superior comfort and protection.
Durable, anti-fog safety glasses that fit comfortably on any head size.
These ear plugs are made of self adjusting foam that provides a comfortable, low pressure fit and excellent sound filtration.
These goggles meet the ANSI Z87.1, 2010 High Impact standards.
High-protection, fluid-resistant and anti-static disposable lab coat in size Extra Large.
Highly durable lab apron made of rubberized cloth is impermeable and easy to clean, perfect for all manner of lab or classroom experiments
Every kid needs one of these spheres!
This magic bird defies gravity before your very eyes!
An ancient toy featuring optical illusion and hands-on fun that never grows old!
You don’t think recycling is cool? Get a look at this, we’re sure you’ll change your mind!
View the glory of space with this hi-tech telescope set!
See the solar system in action!
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