Click the mouse in the animation region to begin the experiment.
The diagram shows three inverted tubes (barometers) containing mercury. A
sample of water, ethyl alcohol and diethyl ether will be injected into each
barometer. It is OK to view the animation more than once, just click on the
Important do not press the enter key or the Return key
while you are answering these questions. Your Browser will interpret either
key the same as clicking the mouse on the Submit button. So BE CAREFUL!