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/sci/ - Science & Math


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4831211 No.4831211 [Reply] [Original]

The pressure caused by the walls of a spherical balloon is inversly proportional to its radius.
Show, that the factor of proportionality is given by 4 times the surface tension of the balloon material(<span class="math">\frac{\Delta W}{\Delta A}[/spoiler].
How do I go about this?
Please explain a possible way.

>> No.4831220

dood the surface area of a sphere is like 4 pi r ^2 or some shit.

take derivatives etc

the answer is 4.