4 若你為消防隊員,至某液化石油氣分裝場檢查某已灌氣之液化石油氣容器,其合格標示內容如下
圖,下列敘述何者錯誤?
(A)該支容器規格 20 公斤,代表其盛水容積為 20 公升
(B)分裝場如依規定灌裝,該支容器總重量應為 37.7 公斤(不考慮誤差值)
(C)從下次檢驗期限,可判定該容器是否為逾期容器
(D)容器號碼 EC 英文代碼,係指該支容器原製造商或進口商
2. (8%) Introduce the following dimensionless terms into the Navior-Stokes equation:
u* =u/u∞, dimensionless velocity
P* =P/ρu∞2, dimensionless pressure
t*=t u∞/L, dimensionless time
x* =x/L, dimensionless distance
The operator∇ may then written ∇*/L. Show that the Navior-Stokes equation becomes