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13. Answer the following question.
A) Give three reasons why our planet does not fly off into space or spiral into the sun.
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- 3. The gravitational acceleration at Earth's surface (ga) is about 10 m/s? and ge = GM/R2. What is g, at the surface of a planet with 2X Earth's mass and 3X Earth's radius?a. Calculate the escape velocity of our solar system, from the surface of the sun. b. What velocity would an object leaving Earth need, to escape from our solar system? (ignore the gravitational effect from Earth and other planets for a & b)The rotation of the planets around the sun is governed by: A. The gravitational field of the sun. B. The gravity of the stars. C. The heat energy of the sun. D. The gravity of the other planets of the solar system. Kelper's second law relates between them: O A. The time period of rotation of the orbiting planet around the sun and the average distance of the planet to the sun. OB. The time period of rotation of the orbiting planet around the sun and the average distance of the planet to the earth. C. The time period of rotation of the orbiting planet around the sun and the average distance of the planet to the moon. OD. The time period of rotation of the orbiting planet around the earth and the average distance of the planet to the sun.
- a. What is a repeat ground-track orbit? b. Explain why repeat ground-track and Sun-synchronous orbits are typically used for Earth observation missions. = c. The constraint for a Sun-synchronous and repeat ground-track orbit is given by T 86, 400, where T is the orbital period in seconds, m the number of days and k the number of revolutions. Explain why this is, in fact, a constraint on the semi-major axis of the orbit. m5. For a satellite to be in a circular orbit 780 km above the surface of the earth. A. What orbital speed must it be given? B. What is the period of the orbit (in hours)?6.. Determine the mass, radius, and orbital radius of this planet. help please
- The orbit of a planet around the sun is : O A. hyperbolic. O B. parabolic. OC. elliptic. OD. circular.16. Calculate the escape speed of a planet with a radius of 1569 km and a gravitational acceleration of 1.30 m/s².NASA IS EXPECTED TO SEND A 2600 KG SATELLITE 450 KM ABOVE THE EARTH'S SURFACE. A. WHAT IS ITS RADIUS? B. WHAT SPEED WILL IT HAVE? C. WHAT IS ITS ORBITAL PERIOD? D. WHAT IS ITS RADIAL ACCELERATION?
- 3. The gravitational acceleration at Earth's surface (ge) is about 10 m/s? and ge = GM/R?. What is gp at the surface of a planet with 2X Earth's mass and 3X Earth's radius?12. As a separate exercise from the simulations, do the following calculation. There is a planet with mass 7.34 x 1024 kg, a day on this planet (Period of Rotation) is 20.43 hours. Calculate the radius of orbit to place a satellite such that it orbits in one planetary day (synchronous orbit).if the average speed of a planet in its orbit is 35 km/hr what would be the speed of the planet when it is closest to the sun? A.35 km/hr B.25 km/hr C.20 km/hr 45. 45 km/hr