The Greenwich meridian is also known as the

a. zero, or prime, meridian.
b. reference circle.
c. east–west coordinate parallel.
d. hour meridian.


a

Physics & Space Science

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a. True b. False Indicate whether the statement is true or false

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Action and reaction pairs of forces

A) always act simultaneously. B) may or may not act simultaneously. C) are independent of time.

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An ice cube floating in a glass of water contains many air bubbles. When the ice melts, the water level will

A) rise. B) fall. C) remain unchanged.

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In the first law of thermodynamics, the work can be

a. only positive. b. only negative. c. neither. d. either positive or negative.

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