16/12/2019 Satellites (STUDY BY TOPICS JUNIOR CLASS) 16/12/2019 9Comments by Gate Academy Welcome to your Satellites (STUDY BY TOPICS JUNIOR CLASS) NAME EMAIL PHONE NUMBER 1. Which satellites to Sky uplink their services to? Astra 2F All of the above None of the above Astra 2E 2. What prevents satellites such as the space shuttle from falling? The absence of air drag Centrifugal force Nothing; they are continually falling as they orbit the Earth. Centripetal force Gravity 3. If a satellite's radial velocity is zero at all times, its orbit must be Circular. Parabolic. Geosynchronous. Elliptical. 4. The Nigeria SAT 1 is used for Observation Weather Surveillance Communication 5. Where is the GPS satellite Navstar operation located? California New York Colorado Wyoming 6. A satellite describes an elliptical orbit about a planet. The satellite travels much faster when it is directly over a High mountain range. Large island. Great plain or plateau. None of the above choices affects its speed very much. Large ocean. 7. Consider a moon that orbits one of our most distant planets in an elliptical path. The distance that the moon covers each day is Greatest when the moon is furthest from the planet. The same regardless of its distance from the sun. The same regardless of its distance from the planet. Greatest when the moon is closest to the planet. 8. The speeds of the planets about the sun depend on Their distances from the sun. The masses of the planets. None of the above are correct. Their periods of rotation. 9. It takes Pluto a longer time to orbit the sun than the Earth does because Pluto Has much further to go. Choices A and B are both correct. Goes much slower. None of the above 10. A satellite near the Earth makes a full circle in about an hour and a half. How long would a satellite located as far away as the moon take to orbit the Earth? About 28 days More information about the satellite is needed. The same hour and a half Less than an hour and a half None of these 11. Which of the following is not a vector quantity? Velocity Speed Acceleration None are vector quantities. 12. How many GPS satellites are currently functioning in space? 28 17 24 4 25 13. The radial velocity of an Earth satellite is its velocity Attributed to satellites moving in any direction. Perpendicular to the surface of the Earth. None of these Parallel to the surface of the Earth. 14. How many of the launches of the GPS satellites have failed? 3 12 5 All but 24 1 15. The circular path of a satellite orbiting the Earth is characterized by a constant Speed. Acceleration. Radial distance. All of these 16. An Earth satellite is simply a projectile Approaching the Earth from outer space Freely falling around the Earth. Floating motionless in space near the Earth. None of the above 17. When was the first GPS satellite launched into space? 1984 1979 1978 1884 18. The fastest moving planet in a solar system is The smallest planet. The planet farthest from the sun. Any planet, for they all move at the same speed The most massive planet. The planet nearest the sun. 19. Roughly how many SD services can you have on a single transponder? 5 12 1 20 20. Planets would crash into the sun if it weren't for Their tangential velocities. Their relatively small masses. The fact that they are beyond the main gravitation of the sun. The inverse-square law. Their vast distances from the sun. 1 out of 20 Time is Up! Time's up
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