Water at 6O O F flows through a straight section of 100 ft of 1-in. Schedule 40 pipe. At a bulk velocity of 5 ft/s the total pressure drop over the 100 ft is 3 psi. Calculate the thickness of the...

Water at 6O^OF flows through a straight section of 100 ft of 1-in. Schedule 40 pipe. At a bulk velocity of 5 ft/s the total pressure drop over the 100 ft is 3 psi. Calculate the thickness of the viscous sublayer inside the pipe. What is the equivalent roughness height for this pipe? Would the pipe be considered completely rough or hydraulically smooth under the given conditions?