Product Code:
MACHANICE00160
Description:
Bell In Vacuum w/Plate & Bell
Specification:
Bell In Vacuum w/Plate & Bell -Nature, of course, abhors a vacuum - and sound waves won't travel
through one. Prove it with a ringing bell inside a sealed glass jar. As
air is gradually pumped out of the jar, the bell becomes faint, then
dies. Includes jar, vacuum plate with valve, rubber seal, bell system,
and instructions. You need a vacuum pump and 2 AA batteries, not
included. Bell may be removed for other vacuum experiments. The inside
height is 8", the diameter is 8".
