Một bình có thể tích 0,5m^ chứa không khí ở áp suất dư 2 bar, nhiệt độ 20.C. Lượng không khí cần thoát ra khỏi bình là bao nhiêu để áp suất
trong bình có độ chân không 420 mmHg trong điều kiện nhiệt độ khí xem
như không đổi. Áp suất khí quyển là 768 mm Hg ở 18.C, p = 29kg.

bình có độ chân không 420 mmHg trong điều kiện nhiệt độ khí xem

như không đổi. Áp suất khí quyển là 768 mm Hg ở 18.C, p = 29kg.

Explanation:

इ दोंत उन्दाएर्स्रंद

answer; (arch); good luck

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.