雷诺数取决于下列哪些因素( )
A: 特征尺寸Lc(characteristic length, m)
B: 流体密度(fluid density, kg/m3)
C: 特征速度V(velocity of the bulk fluid, m/s)
D: 流体的动力粘度μ(dynamic viscosity, kg/m·s)
A: 特征尺寸Lc(characteristic length, m)
B: 流体密度(fluid density, kg/m3)
C: 特征速度V(velocity of the bulk fluid, m/s)
D: 流体的动力粘度μ(dynamic viscosity, kg/m·s)
A,B,C,D
举一反三
- 雷诺数取决于下列哪些因素( ) 未知类型：{'options': ['特征尺寸Lc(characteristic length, m)', '流体密度(fluid density, [img=50x27]18033f6a26f2543.png[/img])', '特征速度V(velocity of the bulk fluid, m/s)', '流体的动力粘度μ(dynamic viscosity,kg/(m·s) )'], 'type': 102}
- 雷诺数取决于下列哪些因素( ) 未知类型：{'options': ['特征尺寸Lc(characteristic length, m)', '流体密度(fluid density, [img=50x27]18033f6a68c3abd.png[/img])', '特征速度V(velocity of the bulk fluid, m/s)', '流体的动力粘度μ(dynamic viscosity,kg/(m·s) )'], 'type': 102}
- A compressible fluid is flowing through a pipe with a constriction. The diameter of the narrow section is 1/2 the diameter of the wide section. The density of the fluid in the narrow section is 3/4 the density of the fluid in the wide section. If the velocity of the compressible fluid is 3.600 m/s in the narrow section, then what is the velocity of the fluid in the wide section? A: 0.675 m/s B: 0.805 m/s C: 0.250 m/s D: 0.333 m/s E: 0.500 m/s
- 流体的运动粘度υ的国际单位是（） A: m/s B: N/m C: kg/m D: N·s/m
- A compressible fluid is flowing through a pipe with a constriction. The diameter of the narrow section is 0.8000 the diameter of the wide section. The velocity of the fluid in the narrow section is 1.700 the velocity of the fluid in the wide section. If the density of the compressible fluid is 1.200 kg/m3 in the narrow section, then what is the density of the fluid in the wide section? A: 1.112 kg/m3 B: 1.256 kg/m3 C: 1.300 kg/m3 D: 1.333 kg/m3 E: 1.400 kg/m3
内容
- 0
流体体积流量单位的为( )。 A: kg/s B: m/s C: m3/s D: m3
- 1
流体运动黏度ν的国际单位是：（） A: m/s B: N/m C: kg/m D: E: s/m
- 2
动力粘度的国际单位是（） A: N／m B: kg／m C: Pa·s D: m／s
- 3
流体运动粘度的国际单位是() A: m2/s B: N/m2 C: kg/m D: N·s/m2
- 4
流体的运动粘度υ的国际单位是（ ）。 A: N/m2 B: kg/m C: N·s/ｍ2 D: m2/s