1.The bottom of a rectangular flume is 5 m above reference level. The depth of the water in the flume is 3 m. The average velocity is 1.7 m/s. What is the total hydraulic energy at the surface of the water and at the bottom of the flume.
2.A 4-cm- diameter rod of aluminum 7075-T6 is to subjected to an axial tensile force such that the factor of safety based on the yield stress on 1.75. Find the maximum allowable tensile force. The yield stress of the aluminum 7075-T6 is o-y= 500MPa.
3.A 4-m-high wooden column with a rectangular cross section is subjected to a 185kN axial compressive force. The modules of elasticity of the wood is 12 GPa. If one side of the column is 25 cm across, find the minimum dimension of the other side to keep the column's deformation under 1.3 mm.