Sound investigations with a tuning fork

Sound with Tuning Fork
Monday, 16th June, 2008
We tried touching a vibrating tuning off various objects in class. These are the things we used:
A cup of water, a ping pong ball and string, containers of rice, peas, sand and water.
When we put a vibrating tuning fork into a cup of water the water comes splashing out, but only if the tuning fork goes arms first into the water.
A ping pong ball on string will jump over and back lots of times when touched by a vibrating tuning fork.
Sand, rice, peas and water in containers will jump when the container is touched by a vibrating tuning fork. We can hear the nice note the tuning fork gives too.