5. Suppose that three specimens made of 7075-T651 Al-alloy (Elastic Modulus= 70GPa, Yield strength =850MPa & possion’s ratio=0.30) with a crack length and load shown in below table which have identical dimensions were loaded in tension and the following data shown below was obtained at room temperature. The specimens exhibited linear behavior. Determine the plain strain fracture toughness

Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.

Which of the following is an easy way to remember the modified “x” tire rotation? a. nondrive wheels straight, cross the drive wheels b. drive wheels straight, cross the nondrive wheels c. drive wheels crossed, nondrive wheels straight d. drive wheels crossed, nondrive wheels crossed

Apump is used to circulate hot water in a home heating system. water enters the well-insulated pump operating at steady state at a rate of 0.42 gal/min. the inlet pressure and temperature are 14.7 lbf/in.2, and 180°f, respectively; at the exit the pressure is 60 lbf/in.2 the pump requires 1/15 hp of power input. water can be modeled as an incompressible substance with constant density of 60.58 lb/ft3 and constant specific heat of 1 btu/lb or. neglecting kinetic and potential energy effects, determine the temperature change, in °r, as the water flows through the pump.