How can you increase the strength of a magnetic field inside a solenoid? a. increase the number of coils per unit length c. place an iron rod inside the solenoid b. increase the current d. all of the above

All of the above foo. Increasing the number of coils allows more current to flow in a unit length with means more magnetic field. The iron rod will be magnetized by the magnetic field of solenoid and will then increase strength of magnetic field. And of course magnetic field increases when current increases

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.

i need with 1.3.2 investigate cycling o2 and co2 apex

we need to see it