(adsbygoogle = window.adsbygoogle || []).push({}); BALLOON PROBLEM. please please help :)

1. The problem statement, all variables and given/known data

I need to find the volume of a helium balloon, and 9 paperclips can sit on it so it doesn't float away (.004kg). Density of He=.18; density of air=1.29; mass of balloon=.0116kg.

2. Relevant equations

Free body sum of equations:

Fy=Fb-W(He)+W(balloon)+(Wpaperclip)=0

3. The attempt at a solution

using the equation above, I first isolated Fb, then I got:

Fb=(.18)(vHe)+(.0116)(g)+(.004)(g)

Fb=p(fluid)v(disp)g=(.18)(vHe)+(.0116)(g)+(.004)(g)

I don't know if this is right. And i don't understand if you solve for Vhe or Vdisp because aren't they the same things.

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# Homework Help: BALLOON PROBLEM. please please help

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