Our solar system is located about 27,000 light-years from the galactic center. How far does our solar system travel in one orbit?

A) 85,000 light-years B) 54,000 light-years
C) 100,000 light-years D) 170,000 light-years


D

Physics & Space Science

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When you look into a pool of water, the depth looks less than it actually is because the light is dispersed

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

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Which of the following is a unit-vector?

A) ( - o)/t B) /x C) v cos ? D) o + t E) sin2? + cos2?

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Suppose you throw a ball vertically downward with a speed of 10 m/s. Neglecting air friction, what would be the speed of the ball one second later?

A. 24.8 m/s B. 19.8 m/s C. 9.8 m/s2 D. -9.8 m/s2 E. 15 m/s

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The U.S. national debt is about $6 trillion. Expressed in powers of ten, this is

A) $6 × 106. B) $6 × 109. C) $6 × 1015. D) $6 × 1012. E) $6 × 1010.

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