And due to less escape velocity the gas molecules easily escape from the planet as it become less than r m s velocity of gas molecules resulting no atmosphere. Escape velocity is the speed that an object needs to be traveling to break free of planet or moon's gravity and enter orbit. So to get from an altitude of 4000 miles to 250,000 miles, at escape velocity, we need this much time: ∫ 4000 240000 d z 1.example #1: What is the escape velocity from the Earth? M Earth =5. ![]()
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