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Is it possible to fly by holding on to enough helium-filled balloons? Consider a 28-cm-diameter helium balloon at 20C. Use PHe = 0.166 kg/m.

Is it possible to "fly" by holding on to enough helium-filled balloons? Consider a 28-cm-diameter helium balloon at 20C. Use PHe = 0.166 kg/m. What is the net upward force on the balloon? How many such balloons would be needed to lift a 25 kg child?

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