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Mach number

(Encyclopedia) Mach numberMach numbermäk [key] [for E. Mach], ratio between the speed of an object and the speed of sound in the medium in which the object is traveling. An airplane that has the…

Freedom in the World, 2008

Since 1978, Freedom House has published Freedom in the World, ======= an annual comparative assessment of political rights and civil liberties around the world. Widely used by…

Freedom in the World, 2009

Since 1972, Freedom House has published Freedom in the World, an annual comparative assessment of the state of political rights and civil liberties around the world. Widely used by…

Freedom in the World, 2007

Since 1978, Freedom House has published Freedom in the World, an annual comparative assessment of the state of political rights and civil liberties around the world. Widely used by…

Teachers' feelings of preparedness

Teachers in the 2000 survey reported the extent to which they felt prepared for the overall demands of their teaching assignments and for eight specific classroom activities.…