# Animate the simulated planet you may need to increase

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Animate the simulated planet. You may need to increase the animation ratefor very large orbits or decrease it for small ones.The planetary presets set the simulated planet’s parameters to those likeour solar system’s planets. Explore these options.Question 13: (1 point) For what eccentricity is the secondary focus (which is usuallyempty) located at the sun? What is the shape of this orbit? NAAP – Planetary Orbit Simulator 2/9
Question 14: (1 point) Create an orbit with a = 20 AU and e = 0. Drag the planet first tothe far left of the ellipse and then to the far right. What are the values of r1and r2at theselocations? Question 15: Question16: r1 (AU)Question17: r2 (AU)Question 18: Far LeftQuestion19: 20Question20: 20Question 21: Far RightQuestion22: 20Question23: 20Question 24: Question 25: (1 point) Create an orbit with a = 20 AU and e = 0.5. Drag the planet first tothe far left of the ellipse and then to the far right. What are the values of r1and r2at theselocations? Question 26: Question27: r1 (AU)Question28: r2 (AU)Question 29: Far LeftQuestion30: 19Question31: 21Question 32: Far RightQuestion33: 21Question34: 19Question 35: Question 36: (1 point) For the ellipse with a = 20 AU and e = 0.5, can you find a point inthe orbit where r1and r2are equal? Sketch the ellipse, the location of this point, and rand r2in the space below. 1Question 37: Question 38: Question 39: Question 40: Question 41: Question 42: Question 43: Question 44: NAAP – Planetary Orbit Simulator 3/9
Question 45: Question 46: Question 47: Question 48: (1 point) What is the value of the sum of r1and r2and how does it relate tothe ellipse properties? Is this true for all ellipses?
Question 49: (1 point) It is easy to create an ellipseusing a loop of string and two thumbtacks. Thestring is first stretched over the thumbtacks whichact as foci. The string is then pulled tight using thepencil which can then trace out the ellipse.Question 50: Assume that you wish to drawan ellipse with a semi-major axis of a = 20 cm and e = 0.5. Using what you have learnedearlier in this lab, what would be the appropriate distances for a) the separation of thethumbtacks and b) the length of the string? Please fully explain how you determine thesevalues.
Kepler’s 2nd LawUse the “clear optional features” button to remove the 1st Law features.Open the Kepler's 2nd Law tab.
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