Coke and Diet Coke are put to the density test. The diet coke floats and the coke sinks. Note: The coke and diet coke cans must be inserted sideways into the water to prevent bubble traps in the bottom of the cans.

Squeezing and releasing bulb makes diver rise or fall.

Balanced sealed globe tips the scales towards it under bell jar during evacuation.

The Magdeburg Sphere is weighed before and after having the air pumped out. The sphere holds about .8 g of air. Depending on how long the vacuum pump runs .6 g or more of air can be removed.