【简答题】(清华大学2006--2007学年春季学期期中考试试题)A football,meant to be thrown at 60 mi/h in sea--level air(ρ=1.22 kg/m3,μ=1.78E-5 N s/m2)is to be tested using a one—quarter(1/4)scale model in a water tunnel(ρ=998 kg/m3,μ...
【简答题】(清华大学2006--2007学年春季学期期中考试试题)A fireboat-pump delivers water to a vertical nozzle with a 3:1 diameter ratio,as in Fig.6-38.If friction is neglected and the flow rate is 0.02 m3/s,how high will the outle...
【简答题】(清华大学2006--2007学年春季学期期中考试试题)On a sea-level standard day,a pressure gage,moored below the suce of the ocean(SG=1.025),reads an absolute pressure of 1.5 MPa.How deep is the instrument?
【简答题】(清华大学2006--2007学年春季学期期中考试试题)A viscous liquid of constant density and viscosity falls due to gravity between two parallel plates a distance 2h apart,as in Fig.4-60.0ne plate is moving at speed w0.The f...