Question: A balloon filled with helium gas has an average density of b = 0 . 4 2 kg / m 3 . The density of

A balloon filled with helium gas has an average density of b =0.42 kg/m3. The density of the air is about a =1.23 kg/m3. The volume of the balloon is Vb =0.057 m3. The balloon is floating upward with acceleration a.

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