This activity will how how a ferrofluid can be manipulated by a magnetic field inside of a test tube. Students will be able to see how the ferrofluid behaves unlike a normal fluid.
- EMG-905, a mineral oil-based ferrofluid with a saturation magnetization of 400 gauss obtained from Ferrofluidics Corporation.
- Strong magnet (cow magnet, bar magnet, or rare earth magnet).
- Long test tube