Olympus Mons is a

A) shield volcano on Mars.
B) stratovolcano on Mercury.
C) large lava plain on the Moon.
D) shield volcano on Venus.
E) stratovolcano on the Moon.


A

Physics & Space Science

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Fill in the blank(s) with correct word

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Spiral density wave theory and self-sustaining star formation are ways to explain why ____

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The length of a certain wire is doubled while its radius is kept constant. What is the change in the resistance of this wire?

A) It stays the same. B) It is doubled. C) It is tripled. D) It is quadrupled. E) It is reduced by a factor of 2.

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The pilot of an aircraft flies due north relative to the ground in a wind blowing 40 km/h toward the east. If his speed relative to the ground is 80 km/h, what is the speed of his airplane relative to the air?

a. 89 km/h b. 85 km/h c. 81 km/h d. 76 km/h e. 72 km/h

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