The material comprising bar AB has density 7.86 Mg/m^3, Young’s Modulus E = 200 GPa, and yield strength σY = 250 MPa. Assuming a factor of safety FS=2 against yielding, determine the length of AB that can be suspended vertically. Then determine the elongation AB undergoes when it is suspended.

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

An air conditioning system consist of a 5 cm diameter pipe, operating at a pressure of 200 kpa. the air initially enters the pipe at 15°c with a velocity of 20 m/s and relative humidity of 80%. if the heat supply throughout the process is 960 w, determine the relative humidity and the temperature at the outlet

Thermal stresses are developed in a metal when its a) initial temperature is changed b) final temperature is changed c) density is changed d) thermal deformation is prevented e) expansion is prevented f) contraction is prevented