Find \(\int_{C} \vec{F} \cdot d r\) for the given \(\vec{F}\) and \(C\).
\(\cdot \vec{F}=-y \vec{i}+x \vec{j}+7 \vec{k}\) and \(C\) is the helix \(x=\cos t, y=\sin t r \quad z=t\), for \(0 \leq t \leq 2 \pi .\)
$$ \int_{C} \vec{F} \cdot d \vec{r}= $$
Find \(\int_{C} \overrightarrow{\mathrm{F}} \cdot d \overrightarrow{\mathrm{r}}\) for \(\overrightarrow{\mathrm{F}}=e^{y} \overrightarrow{\mathrm{i}}+\ln \left(x^{2}+1\right) \overrightarrow{\mathrm{j}}+\overrightarrow{\mathrm{k}}\) and \(C\), the circle of radius 4 centered at the origin in the \(y z\)-plane as shown below.
$$ \int_{C} \vec{F} \cdot d \vec{r}= $$
Suppose \(\vec{F}=(5 x-3 y) \vec{i}+(x+4 y) \vec{j}\). Use Stokes' Theorem to make the following circulation calculations.(a) Find the circulation of \(\vec{F}\) around the circle \(C\) of radius 10 centered at the origin in the xy-plane, oriented clockwise as viewed from the positive z-axis. Circulation \(=\int_{C} \vec{F} \cdot d \vec{r}=\)(b) Find the circulation of \(\vec{F}\) around the circle \(C\) of radius 10 centered at the origin in the yz-plane, oriented clockwise as viewed from the positive \(x\)-axis. Circulation \(=\int_{C} \vec{F} \cdot...
Evaluate \(\int_{C} \mathrm{~F} \cdot d \mathbf{r}\) using the Fundamental Theorem of Line Integrals. Use a computer algebra system to verify your results.$$ \int_{C}[4(2 x+7 y) \mathbf{i}+14(2 x+7 y) \mathbf{j}] \cdot d \mathbf{r} $$C: smooth curve from \((-7,2)\) to \((3,2)\)Evaluate \(\int_{C} \mathrm{~F} \cdot d \mathbf{r}\) using the Fundamental Theorem of Line Integrals. Use a computer algebra system to verify your results.$$ \int_{C} \cos (x) \sin (y) d x+\sin (x) \cos (y) d y $$C: line segment from \((0,-\pi)\) to \(\left(\frac{3 \pi}{2},...
1. ( 8 points) An object moves though a vector field, \(\overrightarrow{\mathbf{F}}(x, y)\), along a circular path, \(\overrightarrow{\mathbf{r}}(t)\), starting at \(P\) and ending at \(Q\) as shown in the graph below.(a) At the point \(R\) draw and label a tangent vector in the direction of \(d \overrightarrow{\mathbf{r}}\).(b) At the point \(R\) draw and label a vector in the direction of the vector filed, \(\overrightarrow{\mathbf{F}}(R)\).(c) At the point \(R\) is \(\overrightarrow{\mathbf{F}} \cdot d \overrightarrow{\mathbf{r}}\) positive, negative, or zero? Circle the correct...
Given$$ \vec{F}(x, y)=\left\langle\frac{2 x^{3}+2 x y^{2}-2 y}{x^{2}+y^{2}}, \frac{2 y^{3}+2 x^{2} y+2 x}{x^{2}+y^{2}}\right\rangle $$Show that \(\int_{C} \vec{F} \cdot d \vec{r}=4 \pi\) for any positively oriented simple closed curve that encloses the origin.
A force in the xy plane is given by = where F is a constant and r=. a.) Find the magnitude of the force. b.)Show that is perpendicular to =x c.) Find the work done by this force on a particle that moves once around a circle of radius 5 m centered at the origin. A force in the xy plane is given by hat{i}+yhat{j} c.) Find the work done by this force on a particle that moves once around...
Question 1. Determine whether or not \(\mathrm{F}(x, y)=e^{x} \sin y \mathbf{i}+e^{x} \cos y_{\mathbf{j}}\) is a conservative field. If it is, find its potential function \(f\).Question 2. Find the curl and the divergence of the vector field \(\mathbf{F}=\sin y z \mathbf{i}+\sin z x \mathbf{j}+\sin x y \mathbf{k}\)Question 3. Find the flux of the vector field \(\mathbf{F}=z \mathbf{i}+y \mathbf{j}+x \mathbf{k}\) across the surface \(r(u, v)=\langle u \cos v, u \sin v, v\rangle, 0 \leq u \leq 1,0 \leq v \leq \pi\) with...
Use a parametrization to find the flux\(\iint_{S} \mathbf{F} \cdot \mathbf{n} \mathrm{d} \sigma\)of the field \(\mathbf{F}=\frac{9 x \mathbf{i}+9 y \mathbf{j}+9 z \mathbf{k}}{\sqrt{x^{2}+y^{2}+z^{2}}}\) across the portion of the sphere \(x^{2}+y^{2}+z^{2}=25\) in the first octant in the direction away from the origin.The flux is _______
4. [5 pts.] Consider the region \(D\), outside the circles \(C_{2}\) and \(C_{3}\) and inside the circle \(C_{1}\) in the figure below and a vector field \(\vec{F}(x, y)=\langle P(x, y), Q(x, y)\rangle\). Assume we know that \(\oint_{C_{2}} \vec{F} \cdot d \vec{r}=\oint_{C_{3}} \vec{F} \cdot d \vec{r}=-2 \pi\), and \(Q_{x}-P_{y}=2\) on an open region containing \(D .\) UseGreen's Theorem to find \(\oint_{C_{1}} \vec{F} \cdot d \vec{r}\).
q1Recitation 22B-Turn in your work at the end of the period Problem 1 A cube of side \(2.0 \mathrm{~m}\) sits ou the \(x y\) plane with one comer at the origin. There is a nom-aniform clectnic field given by \(\vec{E}=\left[\left(4.0 \times 10^{2}\right) \mathrm{x}+350\right] \mathrm{NC} i\), where \(x\) is in meters. Calculate(a) the net electric flux through the cube. (Hint Add the flux through each surface) \(32 \mathrm{kN} \cdot \mathrm{m}^{2} / \mathrm{C}\).(b) the net charge enclosed. \(0.28 \mathrm{pC}\)Problem 2 A hollow insulating sphere has an...
Defining the cross product The cross product of two nonzero vectors \(\vec{u}\) and \(\vec{v}\) is another vector \(\vec{u} \times \vec{v}\) with magnitude$$ |\vec{u} \times \vec{v}|=|\vec{u}||\vec{v}| \sin (\theta), $$where \(0 \leq \theta \leq \pi\) is the angle between the two vectors. The direction of \(\vec{u} \times \vec{v}\) is given by the right hand rule: when you put the vectors tail to tail and let the fingers of your right hand curl from \(\vec{u}\) to \(\vec{v}\) the direction of \(\vec{u} \times \vec{v}\)...