The Way Things Work
PressureDVD - 2003
The inhabitants of Mammoth Island work together to retrieve a wedding ring that has fallen down a sink drain. They discover what a straw, a plunger, a vacuum and a jackhammer all have in common and the differences and similarities between air pressure (pneumatic machines) and liquid pressure (hydraulic machines).
Publisher: Wynnewood, PA : Schlessinger Media, , c2002
Description: 1 videodisc (13 min.) : sd., col. ; 4 3/4 in
Branch Call Number: jDVD 531.1