Demonstration: This shows that carbon dioxide and hydrogen have very different densities to air.

Practical Activity 14-16

Demonstration: These are demonstrations of gaseous diffusion through porous pots.

Practical Activity 14-16

Demonstration: This compares the speed of sound at different pressures and in different gases.

Practical Activity 14-16

Demonstration: An oscilloscope is used to time a pulse of sound travelling from a speaker to a microphone.

Practical Activity 14-16

Demonstration: An oscilloscope is used to find the time of travel of a pulse of sound generated by its time-base.

Practical Activity 14-16

Class practical: Echoes are used outdoors to estimate the speed of sound. Good weather has to be ordered at the same time as...

Practical Activity 14-16