Big Barometer - Demonstration
This demonstration shows the construction of of an eleven foot high barometer made with a concentrated solution of potassium tetraiodomercurate(II).
vacuum
Comparison of the densities of water, potassium mercury iodide, and mercury
Comparing the densities of mercury, potassium tetraiodomercurate(II) solution, and water illustrates that barometers made from the three liquids have different heights.
Torricelli Barometer
The construction of a Torricelli barometer is demonstrated.
Mercury Barometer filled using a Vacuum Pump
A vacuum pump is used to fill a barometer with mercury.
Barometer Shape
Barometers of different shapes all have the same level of mercury.
Vapor Pressure: Collapsing Balloon
Balloons are placed on the tops of two Erlenmeyer flasks, one containing boiling water and the other containing hot air. As the flasks cool, the balloon on the flask of water is drawn into the flask.
Atmospheric pressure
Atmospheric pressure causes the collapse of a metal can.