21. People can snorkel down to a depth of roughly one meter. This means that the additional pressure
問題詳情
21. People can snorkel down to a depth of roughly one meter. This means that the additional pressure on the air in their lungs is roughly (A) 9800 N (B) 9800 Pa (C) 9800 atm (D) 19600 N (E) 19600