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If planet A has a escape velocity V/A = 11.2 km/s and the one of planet B is V/B= 13 km/s, which of thefollowing affirmations is true?a. Planet A orbits closer to the Sun.b. Planet B has more mass than planet A.c. Planet A has more mass than planet Bd. Planet B orbits closer to the Sun.e. The escape velocity of planet B is times that of A.

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The minimum speed required to launch an object so that it remains the same distance above the ground and just falls around the Earth is called:- the Keplerian speed- Newtonian orbit velocity- the speed of sound (or Mach 1)- circular satellite velocity- perigee speed

The Earth's escape speed (the speed you need to get away forever) is about 25,000 miles per hour. Escape speed depends on the gravity of the object trying to hold the spacecraft from escaping. Based on your understanding of gravity, how will the escape speed from the Moon compare to the escape speed from Earth?- The Moon's escape speed will be smaller than Earth's- The Moon's escape speed will change depending on whether it's a crescent Moon or a full Moon- The Moon's escape speed will be balanced by the Earth being so close and it will be zero- The Moon's escape speed will be greater than Earth's- The Moon's escape speed will be exactly the same as Earth's

Why do satellites launched into low-Earth orbits not remain there indefinitely?- this is an unsolved problem, but a NASA committee has been assigned to work on it- they tend to collide with other spacecraft and spacecraft fragments- they do not have enough speed to fall freely around the Earth- they run out of fuel, and without fuel, all satellites, no matter what their orbit is, must fall- they lose speed due to friction with the upper layers of the Earth's atmosphere

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