Asmall jet airplane has a total wing area of 77.5 m2 and a mass of 7.03 x 104 kg (a) if this jet is in horizontal flight, determine the pressure difference between the lower and upper surfaces of the wings pa (b) when the speed of air traveling over the wing is 237 m/s, determine the speed of air under the wing. use 1.29 kg/m3 as the density of air. m/s (c) why do all aircraft have a maximum operational altitude? o the density of air decreases with higher altitude, which increases o the density of air increases with higher altitude, which decreases o the density of air increases with higher altitude, which increases the o the density of air decreases with higher altitude, which decreases the pressure difference until it cannot support the aircraft. the pressure difference until it cannot support the aircraft. pressure difference until it cannot support the aircraft. the pressure difference until it cannot support the aircraft.

To understand the behavior of the electric field at the surface of a conductor, and its relationship to surface charge on the conductor. a conductor is placed in an external electrostatic field. the external field is uniform before the conductor is placed within it. the conductor is completely isolated from any source of current or charge. part a: which of the following describes the electric field inside this conductor? it is in the same direction as the original external field.it is in the opposite direction from that of the original external field.it has a direction determined entirely by the charge on its surface.it is always zero. part b: the charge density inside the conductor is: 0non-zero; but uniformnon-zero; non-uniforminfinite part c: assume that at some point just outside the surface of the conductor, the electric field has magnitude e and is directed toward the surface of the conductor. what is the charge density η on the surface of the conductor at that point? express your answer in terms of e and ϵ0