Fleas have remarkable jumping ability. a 0.55 mg flea, jumping straight up, would reach a height of 30 cm if there were no air resistance. in reality, air resistance limits the height to 20 cm .
part a : what is the flea's kinetic energy as it leaves the ground? express your answer to two significant figures and include the appropriate units.
part b: at its highest point, what fraction of the initial kinetic energy has been converted to potential energy? express your answer using two significant figures.

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.

d eras and periods