Whispering in a soap bubble
Soap bubbles are marvelously playful. A cascade of bubbles blown into the air can send children running in circles to pop them before they hit the ground. And if you know how to look, soap bubbles are just as playful on much smaller scales, sending scientists running in circles to understand their fascinating physics. Read on to learn more!
Electric Crystals and their Broken Symmetries
Students learn how some crystals produce electricity when squeezed! This lesson is part 4 of a 4-part student-driven, lecture-free series, in which students will do card sorts, build hands-on models, solve engineering design puzzles, and more!
What is Viscosity?
The term may be unfamiliar, but we all have a sense for viscosity. We often think of it colloquially as the “thickness” of a fluid. It’s the property that makes honey pour so differently from water. Fluid dynamicists – scientists and engineers who study how liquids and gases move – tend to think of viscosity in terms of a fluid’s resistance to flowing or changing its shape.