Planet-x has a mass of 3.23x 1024 kg and a radius of 8980 km. what is the first cosmic speed i. e. the speed of a satellite on a low lying circular orbit around this planet? (planet-x doesn't have any atmosphere.) 4.90 km/s you are correct. your receipt no. is 154-7248 previous tries what is the second cosmic speed i. e. the minimum speed required for a satellite in order to break free permanently from the planet? 6.93 km/s you are correct. your receipt no. is 154-3204 previous tries if the period of rotation of the planet is 14.9 hours, then what is the radius of the synchronous orbit of a satellite?