1. Draw and label a model of Mars and Earth that shows their orbits around the sun. Include their distances from the sun in AUS. their relative sizes. the length of time each planet takes to make one revolution. the axis of rotation for each planet.
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- Kepler's 1st law says that our Solar System's planets orbit in ellipses around the Sun where the closest distance to the Sun is called perihelion. Suppose I tell you that there is a planet with a perihelion distance of 2 AU and a semi-major axis of 1.5 AU. Does this make physical sense? Explain why or why not.According to Lunar Laser Ranging experiments the average distance LM from the Earth to the Moon is approximately 3.85 × 10° km. The Moon orbits the Earth and completes one revolution in approximately 27.5 days (a sidereal month). How can the mass of the Earth be calculated using the information above? Select the correct statements. Select one or more: O a. Use Newton's third law. O b. Use Newton's first law. c. Use Coulombs law. O d. Use Newton's second law.Describe your approach to calculation of the gravitational field strength on a planet with a given size (e.g. diameter) and known escape velocity. O a. Use Newton's law of universal gravitation. O b. Use Newton's 3rd law. O c. Use Newton's 1st law. O d Use Newton's 2nd law. O e. Use law of conservation of energy.
- 3. What is the official definition of a planet and why is Pluto not a planet?5. A spherical planet has a mass of 5 X 1024 kg. Its diameter is 10,000 km. First calculate its vol- ume in meters (1 km = 1000 m). Then calculate its density (Mass/Volume) in kg/m³.What changes when one is on the moon compared to Earth, weight or mass? Why? Explain.