The mass of a measuring cylinder is 190 g. 400 cm3
of liquid is put into the measuring cylinder.
The total mass of the measuring cylinder and the liquid is 560g.
Four solid objects are lowered in turn into the liquid. The densities of the objects are shown.
1 0.40 g / cm3
2 0.90 g / cm3
3 1.2 g / cm3
4 2.7 g / cm3
Which objects will float in the liquid?

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.

a coal burning power plant

nah.   i'm just sleepy.