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North Korea begins fuelling rocket: report

US satellite data suggests North Korea may have already begun fuelling a rocket it plans to launch this month in the face of international opposition, a Japanese newspaper reported Friday, citing a US defence official.

date12 hours ago in Space Exploration
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Partitioning by collision

An ensemble consisting of a binary mixture of particles of equal size can partition itself into its component fractions - provided that the two species differ in their diffusion constants.

date7 hours ago in General Physics
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