Lecture 46 - Cepheids and Galactic Structure
AST 114: Survey of Astronomy - Lecture Videos - Lecture 46 - Cepheids and Galactic Structure - Missouri State University > COMPLETE COURSES > AST 114: Survey of Astronomy > Lecture Videos > Lecture 46 - Cepheids and Galactic Structure
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Roll-bonded aluminium alloy diffusion couple annealed for 60 minutes at 600°C.
This micrograph shows the grain structure of a roll-bonded aluminium alloy diffusion couple annealed for 60 minutes at 600°C. The upper half of the couple is Al-0.5Fe-1.0Mn (wt.%), the lower half is Al-1.0Si (wt.%). Annealing has recrystallised the microstructure. The Al-Fe-Mn alloy has many intermetallic particles (the dark phase). These help create recrystallisation nuclei, hence this alloy has a high density of small grains relative to the Al-Si alloy.The Barker's etch produces a thick oxide
Author(s): DoITPoMS, University of Cambridge,D T L Alexander,

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Author(s): Anido, Carmen L?pez

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This undergraduate level course presents a basic study in geology. It introduces major minerals and rock types, rock-forming processes, and time scales; temperatures, pressures, compositions, structure of the Earth, and measurement techniques; geologic structures and relationships observable in the field; sediment movement and landform development by moving water, wind, and ice; crustal processes and planetary evolution in terms of global plate tectonics with an emphasis on ductile and brittle p
Author(s): Elkins-Tanton, Lindy

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Content within individual OCW courses is (c) by the individual authors unless otherwise noted. MIT OpenCourseWare materials are licensed by the Massachusetts Institute of Technology under a Creative C

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Author(s): Rothman, Daniel

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Content within individual OCW courses is (c) by the individual authors unless otherwise noted. MIT OpenCourseWare materials are licensed by the Massachusetts Institute of Technology under a Creative C

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Author(s): DoITPoMS, University of Cambridge,Prof T W Clyne,

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Author(s): Davenport, Glorianna

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