Crushing Can

We are usually unaware of the immense strength of the pressure due to the atmosphere around us, having taken it for granted. This demonstration will utilize atmospheric pressure to crush an aluminum can while introducing concepts such as the relationship between pressure and the amount of gas in a fixed volume. Materials Empty aluminum drink

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Measuring Speed of Sound

Measuring the speed of sound can be done using several methods. The following makes use of the understanding of stationary waves in pipes with one closed end. Such a pipe will have a fundamental mode that looks like this:

Hanging Forks

This simple demonstration can be done anywhere at home using the following items: an empty glass a toothpick two forks The video below demonstrates how to do it. When the forks are balanced on the mouth of the glass with the toothpick, the centre of gravity of the forks-and-toothpick system will adjust itself so that

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Cartesian Diver

Ever wondered how a submarine sinks and floats? The demonstration here can be used to explain the changes in forces involved and is going to impress most people who see it for the first time. It consists of a floating object inside a sealed plastic bottle that sinks when the bottle is given a tight

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