Suppose there is a hole in the can of paint in Exercise 45 and 9 lb of paint leaks steadily out of the can during the man’s ascent. How much work is done? Exercise 45: A 160-lb man carries a 25-lb can of paint up a helical staircase that encircles a silo with a radius of 20 ft. If the silo is 90 ft high and the man makes exactly three complete revolutions climbing to the top, how much work is done by the man against gravity? Exercise 9: Evaluate the line integral, where C is the given curve. ∫C x2y ds, C: x = cos t, y = sin t, z = t, 0 < t < π/2
> Use the Divergence Theorem to calculate the surface integral ∫∫S F dS; that is, calculate the flux of F across S. S is the surface of the solid bounded by the cylinder x2 + y2 = 4 and the planes z = y - 2 and z =
> Use the Divergence Theorem to calculate the surface integral ∫∫S F dS; that is, calculate the flux of F across S. S is the surface of the solid bounded by the paraboloid z = 1 - x2 - y2 and the xy-plane F(x, y
> (a). What is a conservative vector field? (b). What is a potential function?
> Use the Divergence Theorem to calculate the surface integral ∫∫S F dS; that is, calculate the flux of F across S. S is the surface of the tetrahedron enclosed by the coordinate planes and the plane x/a + y/b + z/c
> Verify that the Divergence Theorem is true for the vector field F on the region E. F (x, y, z) = 3x i + xy j + 2xz k, E is the cube bounded by the planes x = 0, x = 1, y = 0, y = 1, z = 0, and z = 1
> Evaluate the surface integral. ∫∫S x2yz dS, S is the part of the plane z = 1 + 2x + 3y that lies above the rectangle [0, 3g] × [0, 2]
> Use Stokes’ Theorem to evaluate ∫C F ∙ dr. In each case C is oriented counterclockwise as viewed from above. F (x, y, z) = i + (x + yz) j + (xy - √z) k, C is the boundary of the part of the plane 3x + 2y + z = 1 in the first octant
> Use Stokes’ Theorem to evaluate ∫C F ∙ dr. In each case C is oriented counterclockwise as viewed from above. F (x, y, z) = (x + y2) i + (y + z2) j + (z + x2) k, C is the triangle with vertices (1, 0, 0), (0, 1, 0), and (0, 0, 1)
> Use Stokes’ Theorem to evaluate ∫∫S curl F dS. F (x, y, z) = exy i + exz j + x2z k, S is the half of the ellipsoid 4x2 + y2 + 4z2 = 4 that lies to the right of the xz-plane, oriented in the direction of the positive y-axis
> Evaluate the surface integral. ∫∫S (x + y + z) dS, S is the parallelogram with parametric equations x = u + v, y = u - v, z = 1 + 2u + v, 0 < u < 2, 0 < v < 1
> Let r = x i + y j + z k and r = |r |. Verify each identity. (a). ∇r = r/r (b). ∇ × r = 0 (c). ∇ (1/r) = -r/r3 (d). = ln r = r/r2
> 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) = x i + y j + 5 k, S is the boundary
> 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) = x i + 2y j + 3z k, S is the cube wi
> In what ways are the Fundamental Theorem for Line Integrals, Green’s Theorem, Stokes’ Theorem, and the Divergence Theorem similar?
> 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) = yz i + zx j + xy k, S is the surfac
> 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) = y j - z k, S consists of the parabo
> 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) = y i - x j + 2z k, S is the hemisphe
> 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) = x i + y j + z2 k, S is the sphere w
> 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) = -x i - y j + z3 k, S is the part of
> 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 k, S is the part o
> 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) = z i + y j + x k, S is the helicoid
> Evaluate the surface integral. ∫∫S xz dS, S is the boundary of the region enclosed by the cylinder y2 + z2 = 9 and the planes x = 0 and x + y = 5
> Evaluate the surface integral. ∫∫S (x2z + y2z) dS, S is the hemisphere x2 + y2 + z2 = 4, z > 0
> Evaluate the surface integral. ∫∫S y2 dS, S is the part of the sphere x2 + y2 + z2 = 1 that lies above the cone z = √x2 + y2
> State the Divergence Theorem.
> Verify that Stokes’ Theorem is true for the given vector field F and surface S. F (x, y, z) = y i + z j + x k, S is the hemisphere x2 + y2 + z2 = 1, y > 0, oriented in the direction of the positive y-axis
> Evaluate the surface integral. ∫∫S y2z2 dS, S is the part of the cone y = √x2 + z2 given by 0 < y < 5
> Evaluate the surface integral. ∫∫S z2 dS, S is the part of the paraboloid x = y2 + z2 given by 0 < x < 1
> Evaluate the surface integral. ∫∫S y dS, S is the surface z = 2/3 (x3/2 + y3/2), 0 < x < 1, 0 < y < 1
> Evaluate the surface integral. ∫∫S x dS, S is the triangular region with vertices (1, 0, 0), (0, -2, 0), and (0, 0, 4)
> Evaluate the surface integral. ∫∫S xz dS, S is the part of the plane 2x + 2y + z = 4 that lies in the first octant
> Find (a) the curl and (b) the divergence of the vector field. F (x, y, z) = xy2z2 i + x2yz2 j + x2y2z k
> Evaluate the surface integral. ∫∫S (x2 + y2) dS, S is the surface with vector equation r (u, v) =〈2uv, u2 - v2, u2 + v2〉, u2 + v2 < 1
> Evaluate the surface integral. ∫∫S y dS, S is the helicoid with vector equation r (u, v) =〈u cos v, u sin v, v〉, 0 < u < 1, 0 < v < π
> Evaluate the surface integral. ∫∫S xyz dS, S is the cone with parametric equations x = u cos v, y = u sin v, z = u, 0 < u < 1, 0 < v < π/2
> State Stokes’ Theorem.
> Suppose that f (x, y, z) = g (√x2 + y2 + z2), where t is a function of one variable such that g (2) = 25. Evaluate ∫∫S f (x, y, z) dS, where S is the sphere x2 + y2 + z2 = 4.
> Find (a) the curl and (b) the divergence of the vector field. F (x, y, z) = xyez i + yzex k
> Find a parametric representation for the surface. The plane that passes through the point (0, -1, 5) and contains the vectors 〈2, 1, 4〉 and 〈-3, 2, 5〉
> Evaluate the surface integral. ∫∫S x dS, S is the surface y = x2 + 4z, 0 < x < 1, 0 < z < 1
> Use Green’s Theorem to evaluate the line integral along the given positively oriented curve. ∫C y3 dx - x3 dy, C is the circle x2 + y2 = 4
> Find (a) the curl and (b) the divergence of the vector field. F (x, y, z) = 〈arctan (xy), arctan (yz), arctan (zx)〉
> Find (a) the curl and (b) the divergence of the vector field. F (x, y, z) = 〈ex sin y, ey sin z, ez sin x〉
> Find (a) the curl and (b) the divergence of the vector field. F (x, y, z) = ln (2y + 3z) i + ln (x + 3z) j + ln (x + 2y) k
> Find (a) the curl and (b) the divergence of the vector field. F (x, y, z) = √x/ 1 + z i + √y 1 + x j + √z 1 + y k
> Find the area of the surface. The surface with parametric equations x = u2, y = uv, z = }v², 0 < u < 1,0 < v< 2
> If F = P i + Q j, how do you determine whether F is conservative? What if F is a vector field on R3?
> Find the area of the surface. The helicoid (or spiral ramp) with vector equation r(u, v) = u cos v i + u sin v j + v k, 0 <u < 1,
> (a). Show that a constant force field does zero work on a particle that moves once uniformly around the circle x2 + y2 = 1. (b). Is this also true for a force field F (x) = kx, where k is a constant and x = 〈x, y〉?
> Find the area of the surface. The part of the surface z = xy that lies within the cylinder x2 + y2 = 1
> Find the area of the surface. The part of the surface z = 4 - 2x2 + y that lies above the triangle with vertices (0, 0), (1, 0), and (1, 1)
> Find the area of the surface. The surface z = 2/3 (x3/2 + y3/2), 0 < x < 1, 0 < y < 1
> Find the area of the surface. The part of the plane x + 2y + 3z = 1 that lies inside the cylinder x2 + y2 = 3
> Find the area of the surface. The part of the plane with vector equation r(и, v) — (и + 0, 2 — Зи, 1 + и — в) that is given by 0 <u < 2, –1<v<1
> Find (a) the curl and (b) the divergence of the vector field. F (x, y, z) = sin yz i + sin zx j + sin xy k
> Find the area of the surface. The part of the plane 3x + 2y + z = 6 that lies in the first octant
> Evaluate the line integral. ∫C F ∙ dr, where F (x, y, z) = ez i + xz j + (x + y) k and C is given by r (t) = t2 i + t3 j - t k, 0 < t < 1
> Find an equation of the tangent plane to the given parametric surface at the specified point. r(u, v) = sin u i + cos u sin vj + sin v k; u = T/6, v = /6 %3D
> Find an equation of the tangent plane to the given parametric surface at the specified point. r(u, v) = u cos vi + u sin vj + v k; u = 1, v = "/3
> Find an equation of the tangent plane to the given parametric surface at the specified point. r(u, v) = u cos vi + u sin vj + v k; u= 1, v = T/3 %3D
> Use Green’s Theorem in the form of Equation 13 to prove Green’s first identity: where D and C satisfy the hypotheses of Green’s Theorem and the appropriate partial derivatives of f and t exist and a
> Find parametric equations for the surface obtained by rotating the curve x = 1/y, y > 1, about the y-axis and use them to graph the surface.
> Find parametric equations for the surface obtained by rotating the curve y = 1/ (1 + x2), -2 < x < 2, about the x-axis and use them to graph the surface.
> Prove the identity, assuming that the appropriate partial derivatives exist and are continuous. If f is a scalar field and F, G are vector fields, then f F, F ∙ G, and F × G are defined by div (∇f &Atild
> Prove the identity, assuming that the appropriate partial derivatives exist and are continuous. If f is a scalar field and F, G are vector fields, then f F, F ∙ G, and F × G are defined by div (F × G) = G &ac
> Prove the identity, assuming that the appropriate partial derivatives exist and are continuous. If f is a scalar field and F, G are vector fields, then f F, F ∙ G, and F × G are defined by curl) (f F) = f curl F + (â
> Find a parametric representation for the surface. The part of the sphere x2 + y2 + z2 = 36 that lies between the planes z = 0 and z = 3√3
> Evaluate the line integral. ∫C F ∙ dr, where F (x, y) = xy i + x2 j and C is given by r (t) = sin t i + (1 + t) j, 0 < t < π
> Prove the identity, assuming that the appropriate partial derivatives exist and are continuous. If f is a scalar field and F, G are vector fields, then f F, F ∙ G, and F × G are defined by curl (F + G) = curl F + curl G
> Find a parametric representation for the surface. The part of the sphere x2 + y2 + z2 = 4 that lies above the cone z = √x2 + y2
> Show that any vector field of the form F (x, y, z) = f (y, z) i + g (x, z) j + h (x, y) k is incompressible.
> Find a parametric representation for the surface. The part of the hyperboloid 4x2 - 4y2 - z2 = 4 that lies in front of the yz-plane
> Find a parametric representation for the surface. The plane through the origin that contains the vectors i - j and j - k
> A particle starts at the origin, moves along the x-axis to (5, 0), then along the quarter-circle x2 + y2 = 25, x > 0, y > 0 to the point (0, 5, and then down the y-axis back to the origin. Use Green’s Theorem to find the work done
> Use Green’s Theorem to find the work done by the force F (x, y) = x (x + y) i + xy2 j in moving a particle from the origin along the x-axis to (1, 0), then along the line segment to (0, 1), and then back to the origin along the y-axis.
> Verify Green’s Theorem by using a computer algebra system to evaluate both the line integral and the double integral. P (x, y) = 2x - x3y5, Q (x, y) = x3y8, C is the ellipse 4x2 + y2 = 4
> Determine whether or not the vector field is conservative. If it is conservative, find a function f such that F = ∇f. F (x, y, z) = z cos y i + xz sin y j + x cos y k
> Determine whether or not the vector field is conservative. If it is conservative, find a function f such that F = ∇f. F (x, y, z) = xyz4 i + x2z4 j + 4x2yz3 k
> Evaluate the line integral. ∫C xy dx + y2 dy + yz dz, C is the line segment from (1, 0, -1), to (3, 4, 2)
> Use Green’s Theorem to evaluate ∫C F ∙ dr. (Check the orientation of the curve before applying the theorem.) F (x, y) =〈y - cos y, x sin y〉, C is the circle (x – 3)2 + (y + 4)2 = 4 oriented clockwise
> Use Green’s Theorem to evaluate ∫C F ∙ dr. (Check the orientation of the curve before applying the theorem.) F (x, y) = 〈e^(-x)+ y^2,e^(-y) x^2 〉, C consists of the arc of the curve y = cos x from (-π/2, 0) to (π/2, 0) and the line segment from (π/2, 0
> Use Green’s Theorem to evaluate ∫C F ∙ dr. (Check the orientation of the curve before applying the theorem.) F (x, y) =〈y cos x - xy sin x, xy + x cos x〉, C is the triangle from (0, 0) to (0, 4) to (2, 0) to (0, 0)
> Use Green’s Theorem to evaluate the line integral along the given positively oriented curve. ∫C (1 - y3) dx + (x3 + ey 2) dy, C is the boundary of the region between the circles x2 + y2 = 4 and x2 + y2 = 9
> Use a calculator to evaluate the line integral correct to four decimal places. ∫C F ∙ dr, where F (x, y, z) = yzex i + zxey j + xyez k and r(t) = sin t i + cos t j + tan t k, 0 < t < π/4
> Evaluate the line integral ∫C F ∙ dr, where C is given by the vector function r(t). F (x, y, z) = (x + y2) i + xz j + (y + z) k, r(t) = t2 i + t3 j - 2t k, 0 < t < 2
> Evaluate the line integral, where C is the given curve. ∫C (y + z) dx + (x + z) dy + (x + y) dz, C consists of line segments from (0, 0, 0) to (1, 0, 1) and from (1, 0, 1) to (0, 1, 2)
> Evaluate the line integral, where C is the given curve. ∫C z2 dx + x2 dy + y2 dz, C is the line segment from (1, 0, 0) to (4, 1, 2)
> Evaluate the line integral, where C is the given curve. ∫Cy dx + z dy + x dz, C: x = √t, y = t, z = t2, 1 < t < 4
> Evaluate the line integral, where C is the given curve. ∫C xyeyz dy, C: x = t, y = t2, z = t3, 0 < t < 1
> Evaluate the line integral. ∫C √xy dx + ey dy + xz dz, C is given by r (t) = t4 i + t2 j + t3 k, 0 < t < 1
> How do you use power series to solve a differential equation?
> Evaluate the line integral, where C is the given curve. ∫C (x2 + y2 + z2) ds, C: x = t, y = cos 2t, z = sin 2t, 0 < t < π2
> Evaluate the line integral, where C is the given curve. ∫C xeyz ds, C is the line segment from (0, 0, 0) to (1, 2, 3)
> Evaluate the line integral, where C is the given curve. ∫C y2z ds, C is the line segment from (3, 1, 2) to (1, 2, 5)
> If C is a smooth curve given by a vector function r (t), a (v• dr = v · [r(b) – r(a)]
> Evaluate the line integral, where C is the given curve. ∫C y ds, C: x − t2, y = 2t, 0 < t < 3
> A 160-lb man carries a 25-lb can of paint up a helical staircase that encircles a silo with a radius of 20 ft. If the silo is 90 ft high and the man makes exactly three complete revolutions climbing to the top, how much work is done by the man against gr
> An object with mass m moves with position function r(t) = a sin t i + b cos t j + ct k, 0 < t < y2. Find the work done on the object during this time period.
> The position of an object with mass m at time t is r(t) = at2 i + bt3 j, 0 < t < 1. (a). What is the force acting on the object at time t? (b). What is the work done by the force during the time interval 0 < t < 1?
> The force exerted by an electric charge at the origin on a charged particle at a point (x, y, z) with position vector r = 〈x, y, z〉 is F (r) = Kr/|r |3 where K is a constant. (See Example 16.1.5.) Find the work done as the particle moves along a straight
