The Andes and the Sierra Nevada Mountains began to form during the Mesozoic due to

A) the formation of the Atlantic Ocean.
B) subduction of Pacific oceanic crust beneath North and South American continental crust.
C) rifting between North America and Africa.
D) meteorite bombardment in Mexico.


Answer: B

Physics & Space Science

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GIVEN • Furnace wall suddenly exposed to radiant heat flux FIND (a) How long before reradiation from the heated wall becomes significant. ASSUMPTIONS (a) Reradiation becomes significant when the reradiated flux from the exposed wall exceeds 10% of the incident radiant flux. (b) The oxidized surface of the exposed wall is black.

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How many nanoseconds does it take for a computer to perform one calculation if it performs calculations per second?

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Proxima Centauri (which is 4.2 light years away)? A) about 0.2 meters (about the length of an adult's forearm) B) about 200 meters (about 2 football fields) C) about 20 meters (about the size of a large classroom) D) about 2 meters (about 2 long footsteps)

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What is the average value of the magnitude of the Poynting vector at 1 meter from a 100-watt lightbulb radiating in all directions?

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