The amount of gravitational force that acts on a space vehicle in close-Earth orbit is
A. the same as the vehicle's weight on Earth's surface.
B. nearly zero.
C. nearly as great as the vehicle's weight on Earth's surface.
D. none of the above
Answer: C
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A dome-shaped mass of glacial ice covering less than 50,000 km2 is a(n) ____________________
____________________. Fill in the blank(s) with the appropriate word(s).
In five half-lives, one-sixteenth of a radioactive substance will remain. Indicate whether the statement is true or false
What is a mineral phase change?
A) A mineral melts from a solid state to a liquid state. B) The exterior of a mineral weathers and changes color. C) A mineral changes density because of the addition of water. D) Atoms in a mineral are rearranged into a denser and more stable structure.
Which of the following locations has the highest return period for hurricanes?
A. northeastern Florida B. Outer Banks, North Carolina C. northwestern Florida D. New England