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...tic substances from those which are magnetic. This technique is useful for the select few minerals which are [[ferromagnetism|ferromagnetic]] (iron-, nick ...ue to the magnets, magnetic particles are being drifted by the movement of the drums. This can create a magnetic concentrate (e.g. an [[ore]] concentrate) ...

{{Short description|Urban stream in New York, US}} ...age_caption = The Fonteyn Kill near its confluence with the Casperkill in June 2007 ...

{{Short description|Trees of significance in South Africa}} [[File:Southafrica428yellowwood.jpg|thumb|The Big Tree, an 800 year old [[Afrocarpus falcatus|Outeniqua yellowwood]] at [ ...

...the development of mathematics, science, technology and engineering during the [[Victorian era|reign]] of [[Queen Victoria]]. [[File:Royal_Institution_Shepherd_TH.jpg|alt=|thumb|330x330px|Painting of the Royal Institution by Thomas Hosmer Shepherd circa 1838.]] ...

...h and avoid investment during a recession. He argued that this invalidated the assumptions of classical economists who thought that [[market clearing|mark ...r money]], but argued that Keynesians ignored the role of [[money supply]] in inflation.{{sfn|McCallum|2008|p=}} [[Robert Lucas, Jr.|Robert Lucas]] and o ...

| caption = A glowing-hot metal bar showing [[incandescence]], the emission of light due to its temperature, is often recognized as a source o ...n, H.B. (1985). p.19</ref> For a closed system, this is the formulation of the [[first law of thermodynamics]]. ...

{{Short description|Sector of the Californian economy}} ...States, 100% of all of North America, and 80% of commercial almonds around the world.]] ...