The tangential velocity of an Earth satellite in circular orbit is its velocity

A. in any direction.
B. parallel to Earth's surface.
C. perpendicular to Earth's surface.
D. not enough information


Answer: B

Environmental & Atmospheric Sciences

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Thunder is caused by ____

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In the present day, what is the most valuable non-living commodity obtained from sea floor?

A) oil and gas B) sand and gravel C) gas hydrate D) gold

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Aquatic ____________________ is determined by environmental factors including temperature, sunlight, dissolved oxygen, and available nutrients.

Fill in the blank(s) with the appropriate word(s).

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Humid middle-latitude climates with mild winters tend to have less precipitation in the summer than during the rest of the year because ________

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Environmental & Atmospheric Sciences