The surface of an ideal molecule of table salt (NaCl) is a square with a chemical structure as shown in the figure. The blue spheres represent Na+ ions and the green spheres represent Cl− ions. Consider only points A, B, C, and D. What is the magnitude of the net electrostatic force on the chlorine ion at point A due to the sodium ions at points B and C? Note: the bond length is 0.282 nm.

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.