1. A 2-cm-diameter sphere moves at Re ¼ 10 (separation is just occurring). What is its speed if it is submerged in (a) water at 10-C, (b) air at 40-C and 400 kPa, and (c) water at 90-C.
2. Water at 10-C flows by a 2-mm-diameter wire with a speed of 2 m=s. Sketch the expected flow showing the separated region, the wake, the boundary layer, and the free stream, should any of these exist.