EISCO Bell in Vacuum Jar - Acrylic, 4-6V DC

• VARIOUS VACUUM EXPERIMENTS || The Bell in a vacuum apparatus can be used to demonstrate several properties of a vacuum such as Boyle's Law, inability for sound to propagate in a vacuum.
• ELECTRICAL BELL || The electrical bell operates on 4-6V DC
• IMPORTANT || This apparatus requires a vacuum pump to operate. Vacuum pump is not included with this purchase.
• INSTRUCTION MANUAL INCLUDED || Each Bell in a vacuum apparatus includes a detailed instruction manual complete with an experiment guide, specification sheet, and safety instructions.

Demonstrate that sound requires air to travel through with the Bell in Vacuum Jar set. Slowly decrease the air inside and hear the sound disappear. Electric bell operates on 4-6V DC.