An aircraft approaches a runway that runs directly east as a strong wind blows out of the south. The direction that the aircraft should point in order to land on the runway is
a. north
b. east of north
c. east
d. south of east
e. south
D
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Repeat Problem 9.23 for a tier of six horizontal 2.5-cm-OD tubes under similar thermal conditions.
GIVEN
? Saturated steam condensing on horizontal tubes
? Tube outside diameter (D) = 2.5 cm = 0.025 m
? Tube outer surface temperature (Ts) = 27°C
? Steam pressure (p) = 12 kPa
? Number of tubes (n) = 6
FIND
? The average heat transfer coefficient (hc)
ASSUMPTIONS
? Steady state
? Film condensation occurs
SKETCH
PROPERTIES AND CONSTANTS
From Appendix 2, Table 13, for saturated water at 12 kPa
A car is traveling with a constant speed when the driver suddenly applies the brakes, causing the car to slow down with a constant acceleration of magnitude 3.50 m/s2
If the car comes to a stop in a distance of 30.0 m, what was the car's original speed? A) 10.2 m/s B) 14.5 m/s C) 105 m/s D) 210 m/s E) 315 m/s
The average value of 
t for a complete cycle is
A. 1. B. 0. C. 0.707. D. 0.500. E. 0.250.
For germanium at a tensile stress of 41 MPa and a temperature of 695°C, what is the primary creep mechanism? The shear modulus of germanium is 41 GPa.
What will be an ideal response?