I made about 50 ml of liquid oxygen by passing medical grade oxygen through a condenser in a dewar of LN2. The photo shows it adhering to a magnet, due to it’s paramagnetism.
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A black oily magnetic liquid forms strange spikes when a magnet is applied. Ferrofluid is a bizarre fluid that is magnetic made of nano sized magnetite particles contained in micelles in a mineral oil base.
“Continue reading” to see how much fun a dirty stain can be…
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