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This tag is for questions relating to pressure, in the physical sciences, the perpendicular force per unit area, or the stress at a point within a confined fluid.

3 votes

Density of Air in a balloon

$$\rho=\frac{n*M}{V}$$ With $n$ the number of moles of the gas, $M$ the molar mass of the gas, and $V$ the volume of the gas. $n$ and $M$ are constant, so: $$\rho_1=\rho_0*\frac{V_0}{V_1}$$ For $V$ we …
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