Exam 7: Internal Flows

The wind speed of the air flowing over a 16-cm-diameter outside mirror is significantly higher than the speed of a vehicle. If the pressure on the front of the mirror is assumed to be Stagnation pressure and the pressure on the rear is assumed to be atmospheric, the power Needed to move the mirror, if the air velocity around the mirror is 30 m/s, is nearest:

Air at 30 $30 ^ { \circ } \mathrm { C }$ C and 200 kPa is flowing in a 30-cm-diameter pipe and difference between the inside of the bend and the outside of the Bend is approximately: Passes through the bend shown. An estimate of the pressure

Water is flowing placidly in a canal at a depth of 2 cm and a width of 2 m with a velocity of 4 m/s. It's a nice sunny day in Arizona near Phoenix in the summertime. Is the flow laminar or turbulent?

Select the flow which must be classified a viscous flow, a flow in which effects of viscosity cannot be neglected:

Oil flows through the Alaska pipe line on a clear, sunny day. The flow in the pipe can best be classified as:

A laminar flow is desired from a tank with a well-rounded entrance to a 6-mm-diameter pipe that drains the tank. A container catches 20 L of 20°C water in 4 minutes. Determine the Reynolds number so one can decide if the flow is laminar.