2019 PHYSICS EN.pdf - Foxit PDF Reader 8 -1 - X . . . File Home Comment View Protect Foxit eSign Help Tell me... Q Find Form Share Eg 53 Co 8 7 Ca User Help Command Post Your Foxit Set to Default Register About Foxit Manual Center Line Help Idea Plug-Ins PDF Reader PDF Reader eSign PDF Docs Start 2019 PHYSICS EN.pdf X 2019 PHYS EN Solutions... g 1.14 7.01 12.35 W h 0.33 9.27 18.77 Source: Wikipedia EN, Jan 18th, 2019 a) Kepler's 3d law states that for planetary orbits T2 3 is a constant, where T is the orbital period and / the orbital radius. Verify Kepler's 3'd law using data for 2 planets from the table above. 3 marks b) Show that the orbital velocity of planet "e" is equal to 3 marks V. = 5.22 x 10* ms. c) For any two planets that are orbiting at a distance , and 2 from a star, the ratio of their orbital velocities v, and V2 is given by V 1 = 1 2 V 2 Derive this expression. 3 marks d) One of the planets of TRAPPIST-1 has an orbital velocity of 4.13 x 104 m s-1. Which planet is it? 3 marks