The helium-filled balloon in Fig P7.75 is tethered at 20°C and 1 atm with a string of

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The helium-filled balloon in Fig P7.75 is tethered at 20°C and 1 atm with a string of negligible weight and drag. The diameter is 50 cm, and the balloon material weighs 0.2 N, not including the helium. The helium pressure is 120 kPa. Estimate the tilt angle θ if the air stream velocity U is (a) 5 m/s or (b) 20 m/s.

The helium-filled balloon in Fig P7.75
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Elementary Principles of Chemical Processes

ISBN: 978-0471720638

3rd Edition

Authors: Richard M. Felder, Ronald W. Rousseau

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