12. f = 4y²- Z
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quadratic surfaces and spherical, cylindrical
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- 7.3 Compute the curl of the vector field F⃗ =⟨x4,y4,z5⟩F→=⟨x4,y4,z5⟩.curl(F⃗ (x,y,z))curl(F→(x,y,z)) = What is the curl at the point (−4,3,5)(−4,3,5)?curl(F⃗ (−4,3,5))curl(F→(−4,3,5)) = Is this vector field irrotational (curl free) or not?7. (a) Determine the value of k for which (u, v, w) is an orthogonal coordinate system ifx = −(u2 + kv2), y = uv and z = w.(b) Given that F and G are vector fields with G a vector potential of F, prove that G is notunique.(c) Show that a vector field F =(4uv − θ3/√u2 + v2, 2u2/√u2 + v2, (lnθ − 3uθ2/uv), defined in paraboloidalcoordinate system (x = uv cos θ, y = uv sin θ, z =1/2(u2 − v2) is irrotational and hence find its scalar potential.6. (a) Show that a vector field F = (exsiny − yz, excos y − xz, z − xy) is irrotational and hence find its scalar field.(b) For a vector field F =(Rz, 1/R, eR − z2) in cylidrical polar coordinates, show that it is solenoidal and hence find its vector potential G = (G1, 0, G3). (PLEASE ANSWER MY OTHER THREE QUESTION)
- 2-What is the size of the vector space consisting of polynomials of degree not exceeding n? A) 0 B) 2n+1 C) n-1 D) n+1 E) n1. The distance of a point in the 3-D system from the origin a. is defined by the absolute value of the vector from the origin to this point. b. is the square root of the square of the sums of the x-, y- and z-values. c. is the square root of the sum of the squares of x-, y- and z-values. d. can either be negative or positive. e. None of the above. 2. In parametrizing lines connected by two points in 3-D plane, a. there is only one correct parametrization. b. symmetry equations may not exist. c. a, b, and c must not be equal to 0. d. the vector that connects the two points is a scalar multiple of the vector containing the direction numbers. e. None of the above. 3. A plane in 3D-space system a. is generated by at least three points. b. can lie in more than one octant. c. must have a z-dimension. d. must have a point other than the origin. e. None of the above. 4. A quadric surface a. must have either x2, y2, or z2 or a combination of those, on its general expression. b. must have a…Divergence Theorem for more general regions Use the DivergenceTheorem to compute the net outward flux of the following vectorfields across the boundary of the given regions D. F = ⟨x2, -y2, z2⟩; D is the region in the first octant between theplanes z = 4 - x - y and z = 2 - x - y.
- Divergence Theorem for more general regions Use the DivergenceTheorem to compute the net outward flux of the following vectorfields across the boundary of the given regions D. F = ⟨x, 2y, 3z⟩; D is the region between the cylindersx2 + y2 = 1 and x2 + y2 = 4, for 0 ≤ z ≤ 8.2. (a) Let r = (x, Y, z) and r = ||r||. Assuming r cannot equal 0, is there a value of p for which the vector field f(r)=r/r^P is solenoidal? You must fully justify your answer. (b) Show that if f and g are twice differentiable scalar fields then V²(f g) = ƒ V^2g+ g V²f + 2Vƒ · Vg . 3. (a) Show that any vector field of the form h(x, Y, z) = f(x) i+g(y)j+h(z) k, where f, g, h are differentiable functions, is irrotational. (b) Determine whether there is a vector field g such that V x g = xi+yj+zk.1) Consider the conservative vector field given by: F(x, y) = (exy3 + 2e2xy, e2x + 3exy2) A potential function that generates the vector field F corresponds to: A) f(x, y) = exy + exy3 B) f(x, y) = 3exy2 +(e2x/2)+(exy4)/4 C) f(x, y) = e2xy + exy3 D) f(x, y) = exy + e2xy3 2) Consider the vector field F(x, y, z) = (y - z sinx, x, 2z + cosx). The work that performs the F field to displace a body, from point A (3π, −1, 1) to point B (π, 2, 0) corresponds approximately to: A) 28, 45 JB) 32, 42 JC) 15, 71 JD) 13, 72 J
- 1) Of the following vector fields, the one that is conservative corresponds to: (See the answers in the images for question 1) 2) If f is a potential function for the vector field F = (−2y + 2xyz, −2x + x2z, x2y + 8z), then the value of f(3, −4, 1) is: A) −12B) 14C) −8D) 10A two-dimensional vector field describes ideal flow if it has both zero curl and zero divergence on a simply connected region.a. Verify that both the curl and the divergence of the given field are zero.b. Find a potential function φ and a stream function ψ for the field.c. Verify that φ and ψ satisfy Laplace’s equationφxx + φyy = ψxx + ψyy = 0. F = ⟨x3 - 3xy2, y3 - 3x2y⟩calc 3 13.7 #5 Evaluate the surface integral ∫∫S F · dS for the given vector field F and the oriented surface S. In other words, find the flux of F across S. For closed surfaces, use the positive (outward) orientation. F(x, y, z) = xy i + yz j + zx kS is the part of the paraboloid z = 2 − x2 − y2 that lies above the square 0 ≤ x ≤ 1, 0 ≤ y ≤ 1, and has upward orientation.