1)水管的直径10mm, 管中水流流速0.2m/s,水温102103,03bd=1.30800d7/s,试判别其流态。
2)若流速与水温同上,管径改为30mm,管中流态又如何?/ananas/latex/p/474/ananas/latex/p/377/ananas/latex/p/4741
2)若流速与水温同上,管径改为30mm,管中流态又如何?/ananas/latex/p/474/ananas/latex/p/377/ananas/latex/p/4741
举一反三
- 变直径管,直径,,流速。为( ) /ananas/latex/p/507116/ananas/latex/p/507117/ananas/latex/p/507118/ananas/latex/p/2304
- 如果从同一初始态到同一终态有两条途径,一为可逆,另一为不可逆,则S不可逆>S可逆; Sf,不可逆>Sf,可逆;Sg,不可逆>Sg,可逆/ananas/latex/p/8121/ananas/latex/p/8121/ananas/latex/p/8121/ananas/latex/p/8121/ananas/latex/p/8121/ananas/latex/p/8121
- /ananas/latex/p/515893/ananas/latex/p/515894/ananas/latex/p/503271/ananas/latex/p/515901/ananas/latex/p/515902/ananas/latex/p/515907/ananas/latex/p/515908
- 已知()=0.4,则()=( )/ananas/latex/p/152/ananas/latex/p/278/ananas/latex/p/847/ananas/latex/p/281/ananas/latex/p/152/ananas/latex/p/4781/ananas/latex/p/7419/ananas/latex/p/6547
- 已知向量组 ,,, 若 ,, 线性相关,则t=./ananas/latex/p/1207466/ananas/latex/p/1207483/ananas/latex/p/1207493/ananas/latex/p/1390/ananas/latex/p/2677/ananas/latex/p/56537