Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) §15.6 Stokes’ Theorem and the Curl of F, #26 · Multivariable Calculus · Green, Stokes & divergence

(a) if its axis direction is

How fast is a paddlewheel turned by the field $F = y i - x k$

(a) if its axis direction is $n = j$ ? (b) if its axis is lined up with $curl F$ ? (c) if its axis is perpendicular to $curl F$ ?

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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) · §15.6 Stokes’ Theorem and the Curl of F, #26

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