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A ferrofluid is a stable colloidal suspension of magnetic nanoparticles in a carrier liquid.
Physics
The work-energy principle states that the net work done on an object equals its change in kinetic energy: Wnet = Kf · Ki = ΔK. For conservative forces, ΔK = -ΔU.
Physics
At constant temperature and fixed physical conditions, current is directly proportional to potential difference.
Physics
Electric current is the rate of flow of charge through a cross-section.