Name: 什麼是鐵流？ (What is Ferrofluid?)
Uploaded: 2021-01-14T04:57:13.000Z
Duration: 1 min 31 s
Description: 【看影片學英語】數萬部 YouTube 影片，搭配英漢字典即點即查，輕鬆掌握單字發音與用法，長久累積看電影不必再看字幕。

The metallic liquid before your eyes is known as Ferrofluid. Ferrofluid is a magnetic oil

that is attracted to strong magnets. At this exhibit, when we turn the crank, we move the

magnets and it causes the Ferrofluid to change shape. Ferrofluid is made of tiny specks of

iron oxide, oil, and surfactant. The surfactant is a soapy film used to bind the oil and iron

oxide. Without it, the magnets will pull the iron oxide out of the oil. So when we move

the magnets a combination of magnetism, gravity, and surface tension, creates the marvelous

shapes of the Ferrofluid. Ferrofluid is more than beauty, it has applications in aerospace,

automotive and electronics. My name is Maria, thanks for watching our video about Ferrofluid.

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