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Say the density of air is 1.23 kg/m3 and the density of helium is 0.164 kg/m3...

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Physics

Say the density of air is 1.23 kg/m3 and the density of heliumis 0.164 kg/m3 when both are at STP. Let's model a balloon as asphere of radius 0.12 m, with mass 2 g.

1) What is the mass of the helium that would fill a singleballoon?

2) What is the buoyant force on a single balloon?

3) What is the net force on a single balloon?

4) If we attach 0.5 m of string (properties: 800 feet weighs 1pound), what is the net force now on the balloon?

5) How many balloons would you need to have a 1 kg kitten inequilibrium, hovering just above the ground? (assume all of thestrings are vertical, this is actually another problem)

Answer & Explanation Solved by verified expert
3.8 Ratings (473 Votes)
given density of air rhoair 123 kgm3 density of    See Answer
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