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A helium balloon with a volume of 400 m3 , is attached to the ground by...

A helium balloon with a volume of 400 m3 , is attached to the ground by a cable. The balloon material has a weight of 1100 N. Calculate the tension in the cable when the helium and air have densities of 0.180 kg/m3 and 1.3 kg/m3 respectively.

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