A light airplane uses a NACA 4415 airfoil. It has a rectangular wing planform, with an area of 15.3 m2 and a span of 10.2 m. The aircraft is flying at a gross weight of 7340 N. Neglecting any finite wing effects (induced drag) and assuming sea level conditions, at what angle of attack will the aircraft be flying when its airspeed is 160 km/h?

Which of the following is considered to be a vector?               a.  temperature    b.  velocity    c.  time    d.  mass

Afisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surface of the water. it takes a time of 2.20 s for the boat to travel from its highest point to its lowest, a total distance of 0.670 m . the fisherman sees that the wave crests are spaced a horizontal distance of 5.80 m apart. (a) how much is the wavelength? (b) find the period of the wave. (c) how fast are the waves traveling? (d) what is the amplitude a of each wave?

Apositive charge moves in the direction of an electric field. which of the following statements are true? check all that apply. check all that apply. 1.the potential energy associated with the charge decreases. 2. the electric field does positive work on the charge. 3. the electric field does negative work on the charge. 4. the potential energy associated with the charge increases. 5. the electric field does not do any work on the charge. 6. the amount of work done on the charge cannot be determined without additional information.