Pictures

Equal Pressure

What do you think happens when two balloons are allowed to come to equal pressures? Hint: the pressure in the bigger balloon is [usually] lower than that in the smaller balloon.

Balloon Pressure

[Fuzzy] Measuring Pressure in a balloon. Its about 15-20 torr above atmosphere.

Measuring Balloons

The ballons were weighted, filled with helium, lift and volume measured.

Rise Rate

Rise rates of the balloons were measured in the stair well.