The figure shows a distance vs. time graph of an object with three distinct regions, I, II, and III

?

The object’s velocity is positive in region(s)



a.

I.

b.

II.



c.

III.

d.

no regions


a

Physics & Space Science

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Conversion of Units: A light-year (ly) is the distance that light travels in one year. The speed of light is 3.00 × 108 m/s. How many miles are there in 1.00 ly? (1.00 mi = 1.609 km and one year is 365.25 days.)

A. 2.87 × 1013 mi B. 9.46 × 1015 mi C. 5.88 × 1015 mi D. 9.46 × 1012 mi E. 5.88 × 1012 mi

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The brightest and probably youngest surface of any moon of Saturn belongs to

A) Iapetus. B) Mimas. C) Tethys. D) Enceladus. E) Titan.

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After Mars, the next most likely candidates for life in the solar system are

A) comets in the Kuiper-belt. B) the large moons of the Jovian planets. C) the atmospheres of the Jovian planets. D) the largest asteroids. E) comets in the Oort cloud.

Physics & Space Science

Two parallel flat planes of positive charge are separated by a distance d. Plane #1 has charge density ?1 and plane #2 has a charge density ?2. ?1> ?2

(a) In the region between the planes, the magnitude of the electric field is (b) In the region outside the planes the magnitude of the electric field is

Physics & Space Science