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PHYSICS PLEASE HELP

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A large balloon of mass 237 kg is filled with helium gas until its volume is 318 m3. Assume the density of air is 1.29 kg/m3 and the density of helium is 0.179 kg/m3.

(b) Calculate the buoyant force acting on the balloon.
____________N

(c) Find the net force on the balloon and determine whether the balloon will rise or fall after it is released.
______________ N


(d) What maximum additional mass can the balloon support in equilibrium?
_______________kg

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