Aerodynamics

1. The wing chord line is an __________ straight line from the leading edge to the trailing edge of the wing.
4. The angle of attack is the angle between the _____ chord line and the direction of the relative wind.
5. "the internal pressure of a fluid (liquid or gas) decreases at points where the speed of the fluid increases".
7. forms when the temperature of the collecting surface is at or below the dew point of the adjacent air and the dew point is below freezing.
8. Frost on wings disrupts the smooth _________ over the airfoil by causing early airflow separation for the wing.
10. The __________ of the wingtip vortices alters the spanwise lift distribution and reduces the induced angle of attack and induced drag.
12. The downward acting force.

2. Is the result of the interference of the ground (or water)surface with the airflow patterns about an airplane.
3. The forward acting force.
6. An airplane can be ________at any airspeed in any fight attitude.
9. The upward-acting force.
11. The rearward acting force.