Thepictureshowsapipewithdifferentsectionalarea.CompareflowvelocityvandflowrateQoffluidatdifferentsections.
A. v2>v3>v1;Q1=Q2=Q3
B. v1>v3>v2;Q1=Q2=Q3
C. v1=v2=v3;Q2>Q3>Q1
D. v1=v2=v3;Q1>Q3>Q2
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Lowviscosityfluidsconsumemorepower.
A. 对
B. 错
Atatmosphericpressure,oilviscositydecreasesastemperaturerises.
A. 对
B. 错
Atlowpressures,liquidsarenon-compressible.
A. 对
B. 错
Anyfluidcanbecompressedwhenextremelylargepressureisapplied.
A. 对
B. 错