If the index of refraction of a material is 2, this means that light travels
A) 2 times as fast in air as it does in vacuum.
B) 2 times as fast in the material as it does in air.
C) 2 times as fast in vacuum as it does in the material.
D) 2 times as fast in the material than it does in vacuum.
E) 1/2 as fast in air as it does in the material.
C
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As an incompressible fluid in a pipe flows past a region where the pipe gets narrower:
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Constellation names are from _____ translated into _______, the language of science in Europe to the 19th century
a. Greek; Latin. b. Latin; Greek. c. Latin; Arabic. d. Greek; English. e. Greek; Italian.
Which of the following processes slowed the collapse of protogalactic clouds?
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