RE: How Do Birds Migrate? | Earth's Magnetic Field | High Speed Rail | The Uses of Magnets | Ferrofluids

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How Do Birds Migrate? | Earth's Magnetic Field | High Speed Rail | The Uses of Magnets | Ferrofluids

in science •  8 years ago 

thats great¡¡ , i have a question. do you know to make a ferrofluids?.

science
8 years ago by

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      ·  8 years ago 

    Take the black powder out of a laser printer cartridge and mix it with vegetable oil. Its messy.
    You will also need a rare earth magnet. Good luck.

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