AP Physics B

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An empty rubber balloon has a mass of
0.01 kg . The balloon is filled with helium
at a density of 0.181 kg/m3
. At this density
the balloon has a radius of 0.493 m .
If the filled balloon is fastened to a vertical
line, what is the tension in the line? The
acceleration of gravity is 9.8 m/s
2
.
Answer in units of N

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