Above the xy plane (z > 0), there exists a magnetic material with µr1 = 2.0 and a field h~ 1 = 3.0 ˆx + 4.0 ˆz a/m. below the plane (z < 0) is free space. (a) find h~ 2 , assuming the boundary is free of surface current. what angle does h~ 2 make with a normal to the surface? (b) find h~ 2 , assuming the boundary has a surface current k~ = 3.0 ˆx a/m.

The ratio of lift to drag l/d for a wing or airfoil is an important aerodynamic parameter, indeed, it is a direct measure of the aerodynamic efficiency of the wing. if a wing is pitched through a range of angle of attack, l/d first increases, then goes through a maximum, and then decreases. consider an infinite wing with an naca 2412 airfoil. estimate the maximum value of l/d. assume that the reynolds number is 9x10^6.

Two forces produce equal torques on a door about the door hinge. the first force is applied at the midpoint of the door; the second force is applied at the doorknob. both forces are applied perpendicular to the door. which force has a greater magnitude?

This is one type of line graph in which the independent variable is time plotted on the x axis and the dependent variable, also numerical, is plotted on the y axis.