Required information The helium-filled balloon in the image is tethered at 20°C and 1 atm with a string of negligible weight and drag. The diameter is 44 cm, and the balloon material weighs 0.2 N not including the helium. The helium pressure is 120 kPa. U

Elements Of Electromagnetics
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Required information
The helium-filled balloon in the image is tethered at 20°C and 1 atm with a string of negligible weight and drag. The
diameter is 44 cm, and the balloon material weighs 0.2 N not including the helium. The helium pressure is 120 kPa.
U
Estimate the tilt angle 0 if the airstream velocity U is 13 m/s. Assume a drag coefficient of 0.47.
degrees
Transcribed Image Text:Required information The helium-filled balloon in the image is tethered at 20°C and 1 atm with a string of negligible weight and drag. The diameter is 44 cm, and the balloon material weighs 0.2 N not including the helium. The helium pressure is 120 kPa. U Estimate the tilt angle 0 if the airstream velocity U is 13 m/s. Assume a drag coefficient of 0.47. degrees
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