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Scale Models and Ratios
This NASA video segment explains scale models, ratios, proportions, and how to calculate problems with different units of measurement. Example problems are provided with color animation to clarify the use of ratios. credit: NASA
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Word of the Day
lament
Definition:
A song or hymn of mourning composed or performed as a memorial to a dead person.
Synonyms:
coronach
,
dirge
,
requiem
,
threnody
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