PLEASE HELP THIS IS AN ROTC QUESTION The Wright brothers discovered that they didn’t need to tilt an entire wing to turn the craft; they needed to twist only the ends of the wings. What did they call this process?
A Bracing
B Wing movement
C Angle of attack
D Wing warping

Apipe with an outside diameter of 15 cm is exposed to an ambient air and surrounding temperature of -20°c. the pipe has an outer surface temperature of 65°c and an emissivity of 0.85. if the rate of heat loss from the pipe surface is 0.95 kw per meter of length, the external convective heat transfer coefficient (h) is: (a) 12.5 w/m"k (b) 18.6 w/mk (c) 23.7 w/mk (d) 27.9 w/mk (e) 33.5 w/mk