Each of the following diagrams shows a planet orbiting a star. Each diagram is labeled with the planet's mass (in Earth masses) and its average orbital distance (in AU). Assume that all four stars are identical. Use Kepler’s third law to rank the planets from left to right based on their orbital periods, from longest to shortest. If you think that two (or more) of the diagrams should be ranked as equal drag one on top of the other(s) to show this equality. (Distances are to scale, but planet and star sizes are not.)


Answer: Picture above

Physics & Space Science

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If Q = 25 ?C, q = 10 ?C, and L = 40 cm in the figure, what is the magnitude of the electrostatic force on q?



a.
28 N

b.
22 N

c.
20 N

d.
14 N

e.
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