안녕하세요.
김성태 강사입니다.
질문에 답하겠습니다.
(1)
는 단위가 m입니다. 이것을 mm로 구하라고 했으니 1000을 곱한것입니다.
그런데 지금 헷갈리시는게 mm/m 이라서 헷갈리는 것 같습니다.
이것은 1m에 압력손실이 얼마인지를 물어봣으니 그렇습니다. 그래서 l=1m를 대입한 것입니다. AB길이는 30m 인데
(2)
(m)
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두가지 공식은 단위를 mmAq/m로 구하느냐, Pa로 구하느냐에 따라 공식을 선택해서 사용하셔야 합니다.
물의 비중량과 밀도는 1000입니다/
이해가 되시는 지요.
열공하세요.
2021.10.15 김성태 강사