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Diffstat (limited to 'content/know/concept/stokes-law/index.pdc')
| -rw-r--r-- | content/know/concept/stokes-law/index.pdc | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/content/know/concept/stokes-law/index.pdc b/content/know/concept/stokes-law/index.pdc index dee40d6..d876226 100644 --- a/content/know/concept/stokes-law/index.pdc +++ b/content/know/concept/stokes-law/index.pdc @@ -314,7 +314,6 @@ which reduce to a surface area factor $4 \pi a^2$: $$\begin{aligned} \va{D} - %= \int_0^{2\pi} \!\!\! \int_0^\pi \big( \hat{\sigma} \cdot \vu{e}_r \big) \:r^2 \sin\theta \dd{\theta} \dd{\phi} = \vu{e}_z \frac{3 \eta U}{2 a} \int_0^{2\pi} \!\!\!\! \int_0^\pi a^2 \sin\theta \dd{\theta} \dd{\phi} = \vu{e}_z \frac{3 \eta U}{2 a} 2 \pi a^2 \int_0^\pi \sin\theta \dd{\theta} = \vu{e}_z \: 6 \pi \eta U a |