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"Education is the most powerful weapon which you can use to change the world”
– Nelson Mandela

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PS 8

PS 8

Q Question 1 2 / 2 pts Match the specified positions on the ellipse shown to their names. Question 2 2 / 2 pts How is the speed of a planet affected by its position in its orbit? IncorrectQuestion 3 1.5 / 2 pts Use the Law of Gravitation with Kepler's third Law to determine the mass of the Earth . Show the equation used for your calculation . You can write Greek letters in the western alphabet (e.g. pi). Separate variables on the same line using * (e.g. x*y). Don't forget to include units! Question 5 2 / 2 pts Put the steps of the life cycle of a star in order. Question 6 2 / 2 pts What is the significance of the color of a star?

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1.D, D' C A-A' (line segment) B-B' (line segment) 2.It moves faster when closer to the sun 3.Answer 1: 6.02*10^24 Kg Answer 2: M= (4*(pi^2)*(r^3))/(G*t^2) Kg