Asatellite is in a circular orbit about the earth (me = 5.98 x 10^24 kg). the period of the satellite is 1.26 x 10^4 s. what is the speed at which the satellite travels?

Explanation:

According to the Third Kepler’s Law of Planetary motion:

  (1)

Where;:

is the period of the satellite

is the Gravitational Constant and its value is

is the mass of the Earth

 is the semimajor axis of the orbit the satllite describes around the Earth (as we know it is a circular orbit, the semimajor axis is equal to the radius of the orbit).

On the other hand, the orbital velocity is given by:

  (2)

Now, from (1) we can find , in order to substitute this value in (2):

  (3)

  (4)

  (5)

Substituting (5) in (2):

  (6)

  (7)  This is the speed at which the satellite travels

sleep paralysis is a parasomnia, events associated with sleep.

sleep paralysis happens when you are in the middle of waking up or falling asleep. it is the feeling of being conscious but unable to move. it definitely involves hallucinations.

i had a friend that had sleep paralysis and he told me a story one time where he was laying in bed and he couldn't move his body no matter how hard he tried and there was someone standing in the corner of his room coming towards him. he couldn't move and you can't "wake up" because you are already conscious. sometimes sleep paralysis can be triggered by frequent waking up during the night based off of multiple trips to the bathroom, or if you had ever been abused, sleep paralysis can start happening from things like that.