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In the Disney-Pixar
movie It's fairly difficult to see whether this is plausible by estimating the weight of a house -- and one would have to figure out whether the house had the structural strength to be able to be lifted from one point on the roof without breaking apart. So let's do
a simpler problem. Estimate how many helium balloons of the indicated
size in the figure at the right* would be needed to lift
the kitten. You can take the density of air to be ~ 1 kg/m Do you need to worry about the weight of the balloons? * From http://icanhascheezburger.com |

Page last modified November 27, 2010: M29