fluid_mechanics.gif (14060 bytes)

WEIGHT OF AIR - BAROSCOPE


EQUIPMENT
    redball.gif (326 bytes) Bell Jar
    redball.gif (326 bytes) Vacuum Pump
    redball.gif (326 bytes) Beam Balance (with hollow  sphere and counterweight)
   


NARRATIVE
                The baroscope consists of a hollow sphere and counterweight on opposite ends of a simple beam balance. In air, the two masses balance but when the air is evacuated, removing the buoyancy of the air, the sphere outweighs the counterweight.