Aclosed, rigid tank contains 5 kg of air initially at 300 k, 1 bar. as illustrated in fig. p6.50, the tank is in contact with a thermal reservoir at 600 k and heat transfer occurs at the boundary where the temperature is 600 k. a stirring rod transfers 600 kj of energy to the air. the final temperature is 600 k. the air can be modeled as an ideal gas with cv= 0.733 kj/kg·k and kinetic and potential energy effects are negligible. determine the amount of entropy transferred into the air and the amount of entropy produced, each in kj/

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.

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force