Which of the following is/are correct?
1
Velocity profile for turbulent boundary layer over a flat plate in \({u\over U} = ({y\over\delta})^{1\over n }\)
2
Displacement thickness (\(\delta^*\)) for turbulent boundary layer for \({1\over6}^{Th}\) power law is \(\delta \over7\)
3
shape factors for laminar boundary layer for linear velocity profile is \(1\over3\)
4
Boundary shear stress \((\tau_o)\) increases with the decrease in distance from the leading edge of the flat plate.