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I am doing a quick calculation on how to calculate the pressure needed to inflate a perfectly spherical balloon to a certain volume, however I have difficulties with the fact that the balloon (rubber) has resistance to stretching and how this affects the pressure needed. It has to do with the E-modulus of the material I think, but I can not think of a proper way to calculate it?

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Inflating a Rubber Balloon www.engr.uvic.ca/~struchtr/2002balloons.pdf University of Victoria by A DUVTCEV - ‎Cited by 26 - ‎Related articles

**The results may very on temperature, elasticity and external air pressure. Example is Based on a common balloon, average altitude at room temperature for Earth. Jen **

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