2B30.30 Magdeburg Hemispheres

Another demonstration of the strength of air pressure. Evacuate Magdeburg hemispheres. Try to separate them. Relate to difficulty of opening car door if underwater. Ten meters of water ~ 1 atm additional pressure.

Setup Requirements: Vacuum pump needed. A screw driver and clamp is needed to hold hose on hemisphere. Press hemispheres togther while pumping. Close valve and disconnect hose.

Equations: Air pressure ~ 14.7 psi

Safety Issues: None