3-2-1 Contact
Noisy/Quiet: Range of Vibration
Not Rated
S1 • E5 Jan 18, 1980 30mLisa, Marc, and Trini are given a puzzle. They hear a bell ring and, as instructed, put the bell in a closed jar and take out some of the air with a vacuum pump. Since they don't hear the ringing, they begin to wonder: Is the bell broken?
