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Buoyant Force of a Balloon

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A helium filled balloon is tied to a 2.00 m long, .050 0-kg uniform string. The balloon is spherical with a radius of 0.400 m. When released, it lifts a length h of string and then remains in equilibrium. Determine the value of h. The envelope of the balloon has mass of 0.250 kg.

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As we know, the density of the air is 1.25 kg/m3, the density of helium is 0.1785 kg/m3 the volume of ...

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