When a star collapses to half size, the gravitational field at its surface

A. quadruples.
B. increases eightfold.
C. doubles.
D. remains constant.


Answer: A

Environmental & Atmospheric Sciences

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Indicate whether the statement is true or false

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Rock salt and limestone are examples of

A. chemical sedimentary rocks. B. fragmental sedimentary rocks. C. metamorphic rocks. D. igneous rocks.

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Most weather occurs in this temperature-characterized atmospheric layer, the ________

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

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Dams formed by rockfalls are a hazard that must always be removed before failure

a. True b. False

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