Ferrofluids

We compare the properties of three iron mixtures: iron and water, iron and oil and a ferrofluid - a mixture of compounds containing iron and oil. First, we look at how iron filings behave when mixed with water and then oil. We then hold a magnet under a sample of ferrofluid to demonstrate that the liquid behaves as though it is a magnetic solution, when in fact it is a colloid. Physics - Electricity And Circuits - Learning Points. Iron is a magnetic metal.Mixtures usually retain the properties of their components. Nanotechnology is a developing area of science. A Twig Experiment Film. Let students experience real experiments in lab conditions anywhere, from setup, method all the way through to analysis and real-world application.