Oil (v = 10–4 m2/s; sg = 0.9) flows past a plate in a tangen- tial direction so that a boundary layer develops. if the velocity of approach is 0.3 m/s, what is the oil velocity 0.2 m downstream from the leading edge, 0.1 cm away from the plate?

Ahuge (essentially infinite) horizontal nonconducting sheet 10.0 cm thick has charge uniformly spread over both faces. the upper face carries +95.0 nc/m2 while the lower face carries -25.0 nc/ m2. what is the magnitude of the electric field at a point within the sheet 2.00 cm below the upper face? (ε0 = 8.85 × 10-12 c2/n · m2)