0.50kg ball is traveling to the right with a velocity of +10.0m/s. The ball collides elastically with a second ball, which has a mass of 1.5kg and is also traveling to the right with a speed of 4.0m/s. Calculate the final velocities of both balls, assuming a head - on collision.​

true, as the earth rotates the sun hits the surface of the planet; causing the day and night cycle.

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.

waves moving from a fast medium to a slow medium will experience a reflection as light travels more slowly than red light. total internal reflection occurs when the critical angle is.

the ima (higher than 1m) will be greater than the ima with the height of 1m.