Water flows past a flat plate that is oriented parallel to the flow with an upstream velocity of 0.4 m/s. (a) determine the approximate location downstream from the leading edge where the boundary layer becomes turbulent. (b) what is the boundary layer thickness at this location? assume that the water tempetature is 15.6 oc. use approximate physical properties of some common liquids (si units).

Why is alternating current more effective at long–distance travel than direct current? a. the power lines are made out of conductors. b. transformers increase or decrease voltage as needed. c. the ac generator is more efficient. d. ac has lower voltage than dc.

Ajet plane has a sound level of 120 db at a distance of 60 m. what is the q23. sound level at a distance of 6.0 km? (60)2 (6000)? om solution 80db db, hint: 16x assume ultrasound waves travel through the body of an animal at 1540 q24. m/s. if a 30,000 hz signal were reflected off a portion of a heart which was moving toward the source at 3 m/s, what frequency signal would return to the stationary source? solution 30.117hz

The pressure proportional to the area a- inversely b- directly c- increase d-decrease