Cool Labs

Waves on a Helical Spring
Waves on a Helical Spring

Students investigate properties of mechanical waves using a helical spring: wavelength, speed, reflection, standing waves, interference. Neither amplitude nor frequency affects wave speed. As wave frequency goes up, wavelength goes down, and vice versa. Wave pulses can interfere constructively (adding...

Wave Motion
Wave Motion

It’s the “wow” when kids realize the demo isn’t just entertainment…“We can’t drill to the center of the Earth, so how do we know about its crust, mantle, inner and outer core? How can we find the epicenter of an...