What occurs when waves hit an obstacle straight on?
A) Wave refraction
B) Wave diffraction
C) Wave dispersion
D) Wave reflection
D
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How many significant factors are there in the following analysis? How many variables were there in the original analysis?
Which voyage was the first expedition devoted purely to marine science?
A) ?Matthew Maury's oceanographic work as a U.S. naval officer B) ?the Challenger expedition C) ?Benjamin Franklin's first voyage across the Atlantic to take up his post as American Ambassador to France D) ?Captain Cook's voyage to Tahiti in the ship Endeavour
Which of the following is the correct molecular formula for hexane?
A) C6H6 B) C6H10 C) C6H14 D) C6H16
What region generates the most refugees, currently numbering about 6 million?
A) Africa B) Europe C) former Soviet Union (Russia + surrounding countries) D) Latin America E) Mediterranean