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Q. A spherical balloon has a radius of 7.05 m and is filled with helium.How large a cargo can it lift, assuming that the skin and structure of the balloon have a mass of 990 kg? Neglect the buoyant force on the cargo volume itself.

Q. A toy spacecraft is launched directly upward. When the toy reaches its highest point, a spring is released and the toy splits into two parts with masses of .c2kg and .08kg. Immediately after the separation, the .02kg part moves horizontally due east. Air resistance is negligible. True statements about the .08kg part include which of the following?
I. It could more north
II. It takes longer to reach the ground than the .02kg part
III. It strikes the ground farther from the launch point than does the .02kg part

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