Exam_3_form D Solutions

# If the density of the air at this altitude is 129

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Unformatted text preview: π (0.0078 m)2 (0.61m/s) ⎤ = 162 s C) 28.4 s G) 57.9 s ⎣ ⎦ D) 49.3 s H) 21.3 s 13. In level flight of an airplane weighing 1.92 × 104 N, the air speed over the top of each wing is 62.0 m/s and the air speed beneath each wing is 54.0 m/s. If the density of the air at this altitude is 1.29 kg/m3, what is the surface area of each wing of the airplane? A) 16.0 m2 E) 34.3 m2 2 B) 13.3 m F) 25.4 m2 C) 21.7 m2 G) 29.0 m2 2 D) 5.37 m H) 19.2 m2 14. Steel has a Young's modulus 2.00 × 1011 N/m2 and a coefficient of thermal expansion that is 12.0 × 10–6 (°C)–1. A steel beam at 10 °C is constrained to a length of 2.50 m. A pressure of 7.20 × 107 N/m2 is generated at each end of the beam at what temperature? A) 50.0 °C E) 35...
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