Planet-X has a mass of 3.42×1024 kg and a radius of 8450 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.) Submit Answer Tries 0/12 What is the Second Cosmic Speed i. e. the minimum speed required for a satellite in order to break free permanently from the planet? Submit Answer Tries 0/12 If the period of rotation of the planet is 17.1 hours, then what is the radius of the synchronous orbit of a satellite?

First cosmic speed  = 5200 m/s

Second cosmic speed = 7350 m/s

Radius of the synchronous orbit of a satellite = 28,000 km or

Explanation:

The first cosmic speed is given by

G is the universal gravitational constant with value

is the mass of the planet; and

is the radius of the planet.

The second cosmic speed is given by

The radius of the synchronous orbit of a satellite around the planet is given by

where T is the period of rotation of the planet in seconds.

Substituting known values,

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.