Question: Use Stokes' Theorem (in reverse) to evaluate S 5 (curl F). n d where 2y= i + 3x j - 4y=exk ,S is the portion of the paraboloid = = 21 normal on S points away from the z-axis. F = + + de v2 for 0 <=53, and the unit. y2 for 0 ≤ z ≤ 3, and the unit normal on S points away from the z -axis.Stokes' Theorem Formula. The Stoke's theorem states that "the surface integral of the curl of a function over a surface bounded by a closed surface is equal to the line integral of the particular vector function around that surface.". C = A closed curve. F = A vector field whose components have continuous derivatives in an open region ...Dec 4, 2021 · The final step in our derivation of Stokes's theorem is to apply formula (2) to the sum on the left in equation (1). Let ΔAi be the "area vector" for the i th tiny parallelogram. In other words, the vector ΔAi points outwards, and the magnitude of ΔAi is equal to the area of the i th tiny parallelogram. Let xi ∈ R3 be the point where the i ... You might assume curling irons are one-size-fits-all for any hair length and type, but that couldn’t be further from the truth. They come in a variety of barrel sizes and are made from various materials.Oct 29, 2008 · IV. STOKES’ THEOREM APPLICATIONS Stokes’ Theorem, sometimes called the Curl Theorem, is predominately applied in the subject of Electricity and Magnetism. It is found in the Maxwell-Faraday Law, and Ampere’s Law.4 In both cases, Stokes’ Theorem is used to transition between the difierential form and the integral form of the equation. In sections 4.1.4 and 4.1.5 we derived interpretations of the divergence and of the curl. Now that we have the divergence theorem and Stokes' theorem, we can simplify those derivations a lot. Subsubsection 4.4.1.1 Divergence. ... (1819–1903) was an Irish physicist and mathematician. In addition to Stokes' theorem, he is known for the Navier ...16 Ara 2019 ... Figure. Principle of Stokes' theorem. The circulation from all internal edges cancels out. But on the boundary, all edges add together for a ...IfR F = hx;z;2yi, verify Stokes’ theorem by computing both C Fdr and RR S curlFdS. 2. Suppose Sis that part of the plane x+y+z= 1 in the rst octant, oriented with the upward-pointing normal, and let C be its boundary, oriented counter-clockwise when viewed from above. If F = hx 2 y2;y z2;z2 x2i, verify Stokes’ theorem by computing both R C ...Stokes theorem is used for the interpretation of curl of a vector field. Water turbines and cyclones may be an example of Stokes and Green’s theorem. This theorem is a very important tool with Gauss’ theorem in order to work with different sorts of line integrals and surface integrals under definite integrals .Math 396. Stokes’ Theorem on Riemannian manifolds (or Div, Grad, Curl, and all that) \While manifolds and di erential forms and Stokes’ theorems have meaning outside euclidean space, classical vector analysis does not." Munkres, Analysis on Manifolds, p. 356, last line. (This is false.Mar 5, 2022 · Stokes' theorem says that ∮C ⇀ F ⋅ d ⇀ r = ∬S ⇀ ∇ × ⇀ F ⋅ ˆn dS for any (suitably oriented) surface whose boundary is C. So if S1 and S2 are two different (suitably oriented) surfaces having the same boundary curve C, then. ∬S1 ⇀ ∇ × ⇀ F ⋅ ˆn dS = ∬S2 ⇀ ∇ × ⇀ F ⋅ ˆn dS. For example, if C is the unit ... Stokes theorem is used for the interpretation of curl of a vector field. Water turbines and cyclones may be an example of Stokes and Green’s theorem. This theorem is a very important tool with Gauss’ theorem in order to work with different sorts of line integrals and surface integrals under definite integrals .The integral is by Stokes theorem equal to the surface integral of curl F·n over some surface S with the boundary C and with unit normal positively oriented ...Stokes' theorem says that ∮C ⇀ F ⋅ d ⇀ r = ∬S ⇀ ∇ × ⇀ F ⋅ ˆn dS for any (suitably oriented) surface whose boundary is C. So if S1 and S2 are two different …0. Use Stoke's Theorem to evaluate ∫C F ⋅ dr ∫ C F ⋅ d r where F(x, y, z) = 2xzi^ + yj^ + 2xyk^ F ( x, y, z) = 2 x z i ^ + y j ^ + 2 x y k ^ and C is the boundary of the part of the paraboloid where z = 64 −x2 −y2 , z ≥ 0 z = 64 − x 2 − y 2 , z ≥ 0 , where C is oriented counterclockwise when viewed from above .Stokes’ Theorem on Riemannian manifolds (or Div, Grad, Curl, and all that) \While manifolds and di erential forms and Stokes’ theorems have meaning outside euclidean space, classical vector analysis does not." Munkres, Analysis on Manifolds, p. 356, last line. (This is false.Stokes theorem is used for the interpretation of curl of a vector field. Water turbines and cyclones may be an example of Stokes and Green’s theorem. This theorem is a very important tool with Gauss’ theorem in order to work with different sorts of line integrals and surface integrals under definite integrals .1. By Stokes' theorem, ∫ ×v ⋅da = ∮v ⋅dl ∫ × v ⋅ d a = ∮ v ⋅ d l. i.e. We choose a closed path over whatever surface we are given and integrate its divergence with the vector field to get the left hand side of our equation (dot product of curl of v). Think of a disc made of clay. It is its circumference that forms the boundary.Use Stokes’ theorem to solve the following integral (each time the curve is oriented counterclockwise when viewed from above): ∫ C (y + z)dx + (z + x)dy + (x + y)dz ∫ C ( y + z) d x + ( z + x) d y + ( x + y) d z. where C C is the intersection of the cylinder x2 +y2 = 2y x 2 + y 2 = 2 y and the plane y = z y = z. Would this be zero?Sketch of proof. Some ideas in the proof of Stokes’ Theorem are: As in the proof of Green’s Theorem and the Divergence Theorem, first prove it for \(S\) of a simple form, and then prove it for more general \(S\) by dividing it into pieces of the simple form, applying the theorem on each such piece, and adding up the results. In sections 4.1.4 and 4.1.5 we derived interpretations of the divergence and of the curl. Now that we have the divergence theorem and Stokes' theorem, we can simplify those derivations a lot. Subsubsection 4.4.1.1 Divergence. ... (1819–1903) was an Irish physicist and mathematician. In addition to Stokes' theorem, he is known for the Navier ...Hairspray can create flakes that look like dandruff and they're hard to combat — but not impossible. Hairspray is a tricky devil: It can be suffocating, it can make you feel itchy and stifled, it can make your hair crunchy and painful to br...$\begingroup$ @JRichey It is not esoteric. The intuition of a surface as a "curve moving through space" is natural. The explicit parametrizations via this point of view makes it also computationally good for a calculus course, meanwhile explaining where the formulas for parametrizations come from (for instance, the parametrization of the sphere is just rotating a …Proof of Stokes’ Theorem Consider an oriented surface A, bounded by the curve B. We want to prove Stokes’ Theorem: Z A curlF~ dA~ = Z B F~ d~r: We suppose that Ahas a smooth parameterization ~r = ~r(s;t);so that Acorresponds to a region R in the st-plane, and Bcorresponds to the boundary Cof R. See Figure M.54. We prove Stokes’ The-Verify that Stokes’ theorem is true for vector field ⇀ F(x, y) = − z, x, 0 and surface S, where S is the hemisphere, oriented outward, with parameterization ⇀ r(ϕ, θ) = sinϕcosθ, sinϕsinθ, cosϕ , 0 ≤ θ ≤ π, 0 ≤ ϕ ≤ π as shown in Figure 5.8.5. Figure 5.8.5: Verifying Stokes’ theorem for a hemisphere in a vector field.An amazing consequence of Stokes' theorem is that if S′ is any other smooth surface with boundary C and the same orientation as S, then \[\iint_S curl \, F \cdot dS = \int_C F \cdot dr = 0\] because Stokes' theorem says the surface integral depends on the line integral around the boundary only.This is analogous to the Fundamental Theorem of Calculus, in which the derivative of a function f f on line segment [a, b] [a, b] can be translated into a statement about f f on the boundary of [a, b]. [a, b]. Using curl, we can see the circulation form of Green’s theorem is a higher-dimensional analog of the Fundamental Theorem of Calculus.Stokes’ Theorem. There is an analogy among Stokes’ Theorem, Green’s Theorem, and the Fundamental Theorem of Calculus. As before, there is an integral involving derivatives on the left side of Equation 1 (we know that curl . F . is a sort of derivative of . F) and the right side involves the values of . F. only on the . boundary . of . S.Use Stokes’ theorem to solve the following integral (each time the curve is oriented counterclockwise when viewed from above): ∫ C (y + z)dx + (z + x)dy + (x + y)dz ∫ C ( y + z) d x + ( z + x) d y + ( x + y) d z. where C C is the intersection of the cylinder x2 +y2 = 2y x 2 + y 2 = 2 y and the plane y = z y = z. Would this be zero?Important consequences of Stokes’ Theorem: 1. The flux integral of a curl eld over a closed surface is 0. Why? Because it is equal to a work integral over its boundary by Stokes’ Theorem, and a closed surface has no boundary! 2. Green’s Theorem (aka, Stokes’ Theorem in the plane): If my sur-face lies entirely in the plane, I can write ... Calculus and Beyond Homework Help. Homework Statement Use Stokes' Theorem to evaluate ∫∫curl F dS, where F (x,y,z) = xyzi + xyj + x^2yzk, and S consists of the top and the four sides (but not the bottom) of the cube with vertices (±1,±1,±1), oriented outward. Homework Equations Stokes' Theorem: ∫∫curl F dS = ∫F dr a...Figure 16.7.1: Stokes' theorem relates the flux integral over the surface to a line integral around the boundary of the surface. Note that the orientation of the curve is positive. Suppose surface S is a flat region in the xy -plane with upward orientation. Then the unit normal vector is ⇀ k and surface integral.The curl is a form of differentiation for vector fields. The corresponding form of the fundamental theorem of calculus is Stokes' theorem, which relates the surface integral …Stokes' theorem, also known as the Kelvin–Stokes theorem after Lord Kelvin and George Stokes, the fundamental theorem for curls or simply the curl theorem, is a theorem in vector calculus on $${\displaystyle \mathbb {R} ^{3}}$$. Given a vector field, the theorem relates the integral of the curl of the vector field … See moreBy Stokes' theorem, the flux of curl or vorticity vectors through a surface S is equal to the circulation around its perimeter, ... Thus curl and vorticity are the circulation per unit area, taken around a local infinitesimal loop. In potential flow of a fluid with a region of vorticity, ...Stokes’ theorem relates the surface integral of the curl of the vector field to a line integral of the vector field around some boundary of a surface. It is named after George Gabriel Stokes. Although the first known statement of the theorem is by William Thomson and it appears in a letter of his to Stokes.Stoke's theorem. Stokes' theorem takes this to three dimensions. Instead of just thinking of a flat region R on the x y -plane, you think of a surface S living in space. This time, let C represent the boundary to this surface. ∬ S curl F ⋅ n ^ d Σ = ∮ C F ⋅ d r. Instead of a single variable function f. .Jan 16, 2023 · For example, if E represents the electrostatic field due to a point charge, then it turns out that curl \(\textbf{E}= \textbf{0}\), which means that the circulation \(\oint_C \textbf{E}\cdot d\textbf{r} = 0\) by Stokes’ Theorem. Vector fields which have zero curl are often called irrotational fields. In fact, the term curl was created by the ... Oct 10, 2023 · Stokes' Theorem Question 7 Detailed Solution. Download Solution PDF. Stokes theorem: 1. Stokes theorem enables us to transform the surface integral of the curl of the vector field A into the line integral of that vector field A over the boundary C of that surface and vice-versa. The theorem states. 2. That is, it equates a 2-dimensional line integral to a double integral of curl F. So from Green’s Theorem to Stokes’ Theorem we added a dimension, focus on a surface and its boundary, and speak of a surface integral instead of a double integral. Formal Definition of Stokes’ Theorem. Given: • an oriented, piece-wise smooth surface (S)at, Stokes theorem can be seen with Green’s theorem. If we put the coordinate axes so that the surface is in the xy-plane, then the vector eld F induces a vector eld on the surface such that its 2Dcurl is the normal component of curl(F). The reason is that the third component Qx Py of curl(F) = (Ry Qz;Pz Rx;Qx Py) is the two dimensional curl ...Theorem 4.7.14. Stokes' Theorem; As we have seen, the fundamental theorem of calculus, the divergence theorem, Greens' theorem and Stokes' theorem share a number of common features. There is in fact a single framework which encompasses and generalizes all of them, and there is a single theorem of which they are all special cases.I'm tasked with computing the circulation of the vector field $\vec F = <y^2, z, xy>$ along the triangle with vertices $(1,0,0), (0,1,0), (0,0,1)$ with the orientation of the curve following this order.. My first step is to compute the 1-Form of $\vec F$: $\alpha_{\vec F} = y^2dx+zdy+xydz$.Knowing that Stokes's Theorem states: $\int_{\partial D}\alpha_{ …Stokes and Gauss. Here, we present and discuss Stokes’ Theorem, developing the intuition of what the theorem actually says, and establishing some main situations where the theorem is relevant. Then we use Stokes’ Theorem in a few examples and situations. Theorem 21.1 (Stokes’ Theorem). Let Sbe a bounded, piecewise smooth, oriented surfacea differential equation form using the divergence theorem, Stokes’ theorem, and vector identities. The differential equation forms tend to be easier to work with, particularly if one is interested in solving such equations, either analytically or numerically. 2. The Heat Equation Consider a solid material occupying a region of space V.You'll get a detailed solution from a subject matter expert that helps you learn core concepts. Question: Use Stokes' Theorem to evaluate S curl F · dS. F (x, y, z) = zeyi + x cos (y)j + xz sin (y)k, S is the hemisphere x2 + y2 + z2 = 9, y ≥ 0, oriented in the direction of the positive y-axis. Use Stokes' Theorem to evaluate S curl F · dS.To use Stokes' theorem, we just need to find a surface whose boundary is $\dlc$. ... With such a surface along which $\curl \dlvf=\vc{0}$, we can use Stokes' theorem to show that the circulation $\dlint$ around $\dlc$ is zero. Since we can do this for any closed curve, we can conclude that $\dlvf$ is conservative. ...Stokes theorem is a fundamental result in vector calculus that relates the surface integral of a curl to the line integral of a boundary curve. This pdf file provides an intuitive explanation, some examples and a proof of the theorem using small triangles. Learn more about this powerful tool for calculating integrals in three dimensions.Bringing the boundary to the interior. Green's theorem is all about taking this idea of fluid rotation around the boundary of R , and relating it to what goes on inside R . Conceptually, this will involve chopping up R into many small pieces. In formulas, the end result will be taking the double integral of 2d-curl F . Verify Stoke’s theorem by evaluating the integral of ∇ × F → over S. Okay, so we are being asked to find ∬ S ( ∇ × F →) ⋅ n → d S given the oriented surface S. So, the first thing we need to do is compute ∇ × F →. Next, we need to find our unit normal vector n →, which we were told is our k → vector, k → = 0, 01 .Feb 9, 2022 · Verify Stoke’s theorem by evaluating the integral of ∇ × F → over S. Okay, so we are being asked to find ∬ S ( ∇ × F →) ⋅ n → d S given the oriented surface S. So, the first thing we need to do is compute ∇ × F →. Next, we need to find our unit normal vector n →, which we were told is our k → vector, k → = 0, 01 . Figure 9.5.1: (a) Vector field 1, 2 has zero divergence. (b) Vector field −y, x also has zero divergence. By contrast, consider radial vector field R⇀(x, y) = −x, −y in Figure 9.5.2. At any given point, more fluid is flowing in than is flowing out, and therefore the “outgoingness” of the field is negative.IfR F = hx;z;2yi, verify Stokes’ theorem by computing both C Fdr and RR S curlFdS. 2. Suppose Sis that part of the plane x+y+z= 1 in the rst octant, oriented with the upward-pointing normal, and let C be its boundary, oriented counter-clockwise when viewed from above. If F = hx 2 y2;y z2;z2 x2i, verify Stokes’ theorem by computing both R C ...Stokes’ Theorem states Z S r vdA= I s vd‘ (2) where v(r) is a vector function as above. Here d‘= ˝^d‘and as in the previous Section dA= n^ dA. The vector vmay also depend upon other variables such as time but those are irrelevant for Stokes’ Theorem. Stokes’ Theorem is also called the Curl Theorem because of the appearance of r .If curl F ( x , y , z ) · n is constantly equal to 1 on a smooth surface S with a smooth boundary curve C , then Stokes' Theorem can reduce the integral for the ...Math 396. Stokes’ Theorem on Riemannian manifolds (or Div, Grad, Curl, and all that) \While manifolds and di erential forms and Stokes’ theorems have meaning outside euclidean space, classical vector analysis does not." Munkres, Analysis on Manifolds, p. 356, last line. (This is false.Math 396. Stokes’ Theorem on Riemannian manifolds (or Div, Grad, Curl, and all that) \While manifolds and di erential forms and Stokes’ theorems have meaning outside euclidean space, classical vector analysis does not." Munkres, Analysis on Manifolds, p. 356, last line. (This is false.Stokes theorem says that ∫F·dr = ∬curl (F)·n ds. If you think about fluid in 3D space, it could be swirling in any direction, the curl (F) is a vector that points in the direction of the AXIS OF ROTATION of the swirling fluid. curl (F)·n picks out the curl who's axis of rotation is normal/perpendicular to the surface. Stokes' Theorem 1. Introduction; statement of the theorem. The normal form of Green's theorem generalizes in 3-space to the divergence theorem. ... If curl F = 0 in Bspace, then the surface integral should be 0; (for F is then a gradient field, by V12, (4), …Stokes' theorem tells us that this should be the same thing, this should be equivalent to the surface integral over our surface, over our surface of curl of F, curl of F dot ds, dot, dotted with the surface itself. And so in this video, I wanna focus, or probably this and the next video, I wanna focus on the second half. I wanna focus this.Now with the normal vector n ^ unambiguously defined, we can now formally define the curl operation as follows: (4.8.1) curl A ≜ lim Δ s → 0 n ^ ∮ C A ⋅ d l Δ s. where, once again, Δ s is the area of S, and we select S to lie in the plane that maximizes the magnitude of the above result. Summarizing:Stokes theorem says that ∫F·dr = ∬curl (F)·n ds. If you think about fluid in 3D space, it could be swirling in any direction, the curl (F) is a vector that points in the direction of the AXIS OF …Stoke’s Theorem • Stokes’theorem states that the circulation about any closed loop is equal to the integral of the normal component of vorticity over the area enclosed by the contourvorticity over the area enclosed by the contour. • For a finite area, circulation divided by area gives the averageCurl and Divergence – In this section we will introduce the concepts of the curl and the divergence of a vector field. We will also give two vector forms of Green’s Theorem and show how the curl can be used to identify if a three dimensional vector field is conservative field or not.Stokes’ theorem relates the surface integral of the curl of the vector field to a line integral of the vector field around some boundary of a surface. It is named after George Gabriel Stokes. Although the first known statement of the theorem is by William Thomson and it appears in a letter of his to Stokes. For example, if E represents the electrostatic field due to a point charge, then it turns out that curl \(\textbf{E}= \textbf{0}\), which means that the circulation \(\oint_C \textbf{E}\cdot d\textbf{r} = 0\) by Stokes’ Theorem. Vector fields which have zero curl are often called irrotational fields. In fact, the term curl was created by the ...Be able to apply Stokes' Theorem to evaluate work integrals over simple closed curves. As a final application of surface integrals, we now generalize the circulation version of Green's theorem to surfaces. With the curl defined earlier, we are prepared to explain Stokes' Theorem. Let's start by showing how Green's theorem extends to 3D.curl(F~) = [0;0;Q x P y] and curl(F~) dS~ = Q x P y dxdy. We see that for a surface which is at, Stokes theorem is a consequence of Green’s theorem. If we put the coordinate axis so that the surface is in the xy-plane, then the vector eld F induces a vector eld on the surface such that its 2Dcurl is the normal component of curl(F).The classical Stokes' theorem relates the surface integral of the curl of a vector field over a surface in Euclidean three-space to the line integral of the vector field over its boundary. It is a special case of the general Stokes theorem (with n = 2 {\displaystyle n=2} ) once we identify a vector field with a 1-form using the metric on ... Theorem 21.1 (Stokes’ Theorem). Let Sbe a bounded, piecewise smooth, oriented surface in R3, where @Sconsists of nitely many piecewise smooth closed curves oriented compatibly. FOr F a C1-vector eld on a domain containing S, S r F dS = @S F ds: Some notes: (1)Here, the surface integral of the curl of a vector eld along a surface is equal to the Nov 19, 2020 · Figure 9.7.1: Stokes’ theorem relates the flux integral over the surface to a line integral around the boundary of the surface. Note that the orientation of the curve is positive. Suppose surface S is a flat region in the xy -plane with upward orientation. Then the unit normal vector is ⇀ k and surface integral. A great BitTorrent client is all well and good, but you need a great tracker to get the actual torrent files and stoke the bandwidth burning fire in your client of choice. Here's a rundown of five of the most popular options. A great BitTor...Theorem 4.7.14. Stokes' Theorem; As we have seen, the fundamental theorem of calculus, the divergence theorem, Greens' theorem and Stokes' theorem share a number of common features. There is in fact a single framework which encompasses and generalizes all of them, and there is a single theorem of which they are all special cases.Curling is a beloved sport that has gained popularity around the world. Whether you’re a dedicated fan or just starting to discover this exciting game, one thing is for sure – live streaming matches can greatly enhance your curling experien...About this unit. Here we cover four different ways to extend the fundamental theorem of calculus to multiple dimensions. Green's theorem and the 2D divergence theorem do this for two dimensions, then we crank it up to three dimensions with Stokes' theorem and the (3D) divergence theorem.The divergence theorem states that certain volume integrals are equal to certain surface integrals. Let’s see the statement. Divergence Theorem Suppose that the components of F⇀: R3 →R3 F ⇀: R 3 → R 3 have continuous partial derivatives. If R R is a solid bounded by a surface ∂R ∂ R oriented with the normal vectors pointing ...The divergence of the curl is equal to zero: The curl of the gradient is equal to zero: More vector identities: Index Vector calculus . HyperPhysics*****HyperMath*****Calculus: R Nave: ... Stokes' Theorem. The area integral of the curl of a vector function is equal to the line integral of the field around the boundary of the area. Index1. As per Stokes' Theorem, ∫C→F ⋅ d→r = ∬Scurl→F ⋅ d→S. which allows you to change the surface integral of the curl of the vector field to the line integral of the vector field around the boundary of the surface. The surface is hemisphere with y = 0 plane being the boundary, though the question should have been more clear on that.Stokes' Theorem. Let n n be a normal vector (orthogonal, perpendicular) to the surface S that has the vector field F F, then the simple closed curve C is defined in the counterclockwise direction around n n. The circulation on C equals surface integral of the curl of F = ∇ ×F F = ∇ × F dotted with n n. ∮C F ⋅ dr = ∬S ∇ ×F ⋅ n ...The Stokes theorem for 2-surfaces works for Rn if n 2. For n= 2, we have with x(u;v) = u;y(u;v) = v the identity tr((dF) dr) = Q x P y which is Green’s theorem. Stokes has the general structure R G F= R G F, where Fis a derivative of Fand Gis the boundary of G. Theorem: Stokes holds for elds Fand 2-dimensional Sin Rnfor n 2. 32.9.If curl F ( x , y , z ) · n is constantly equal to 1 on a smooth surface S with a smooth boundary curve C , then Stokes' Theorem can reduce the integral for the ...We use the extended form of Green’s theorem to show that ∮ C F · d r ∮ C F · d r is either 0 or −2 π −2 π —that is, no matter how crazy curve C is, the line integral of F along C can have only one of two possible values. We consider two cases: the case when C encompasses the origin and the case when C does not encompass the origin.. Case 1: C …The Stokes Theorem. (Sect. 16.7) I The curl of a vector field in space. I The curl of conservati, a surface which is flat, Stokes theorem is very close to Green’s theorem. If we put the coordinate axis so that the s, Verify Stoke’s theorem by evaluating the integral of ∇ × F → over S. Okay, so we are being asked to find ∬ , Why is the curl considered the differential operator in , Calculus and Beyond Homework Help. Homework Statement Use Stokes' , Similarly, Stokes Theorem is useful when the aim is to determine the line integr, You can find the distance between two points by using the distance formula, an application of the Pythagorean t, Stokes’ theorem relates the surface integral of th, , Level up on all the skills in this unit and collect up , Stokes' theorem is a tool to turn the surface integral , Sketch of proof. Some ideas in the proof of Stokes’ Theorem are: As i, Stokes theorem: Let S be a surface bounded by a curve C and F ~ b, Then the 3D curl will have only one non-zero component, which will b, Most of the vector identities (in fact all of them except T, A. Stokes' theorem states that the flux of the curl of a , direction of (curl F)o = axial direction in which wheel spins , Use Stokes' Theorem to evaluate curl F · dS. F (x, y, z.