1. What is the orbital period of Ceres? (Hints: Use Kepler’s third law, Chapter 4; refer to the…

1. What is the orbital period of Ceres? (Hints: Use Kepler’s third law, Chapter 4; refer to the previous problem for Ceres’s average distance from the sun.) 2. If the velocity of the solar wind is about 400 km/s and the visible tail of a comet is 1 × 108 km long, how much time does it take for a solar wind atom to travel from the nucleus to the end of the visible tail?  

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