This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
RabinowJacob . magnetic fluid consisting of mixture of fine iron and oil formed the heart of the NBS magnetic fluid clutch When acted upon by small permanent magnet that portion of the mixture in the magnetic fluid solidified the iron particles mutually attracted and adhered to the magnet When this fluid was placed between two movable