PIRA ID: 3D30.77

Location: M - 2

Objectives

Observe the effect of density on the speed (and therefore pitch) of sound.

Instructions

1. Fill a glass with hot water that contains lots of dissolved air bubbles.
2. Tap the glass as the bubbles float out of solution and listen to the pitch rise.

To reserve this demo, email the Duke Physics Department at demos@phy.duke.edu.