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mathematics
precalculus
Thomas Calculus Early Transcendentals 13th Edition Joel R Hass, Christopher E Heil, Maurice D Weir - Solutions
Integrate G(x, y, z) = x - y - z over the portion of the plane x + y = 1 in the first octant between z = 0 and z = 1 (1, 0, 1) X 1 (0, 1, 1) 1 y
Integrate g(x, y, z) = x4y(y2 + z2) over the portion of the cylinder y2 + z2 = 25 that lies in the first octant between the planes x = 0 and x = 1 and above the plane z = 3.
The base of the closed cubelike surface shown here is the unit square in the xy-plane. The four sides lie in the planes x = 0, x = 1, y = 0, and y = 1. The top is an arbitrary smooth surface whose identity is unknown. Let F = xi - 2yj + (z + 3)k and suppose the outward flux of F through Side A is 1
Use a parametrization to express the area of the surface as a double integral. Then evaluate the integral.The portion of the plane y + 2z = 2 inside the cylinder x2 + y2 = 1
a. Show that the outward flux of the position vector field F = xi + yj + zk through a smooth closed surface S is three times the volume of the region enclosed by the surface.b. Let n be the outward unit normal vector field on S. Show that it is not possible for F to be orthogonal to n at every
Although they are not defined on all of space R3, the fields associated with are conservative. Find a potential function for each field and evaluate the integrals as in Example 6. EXAMPLE 6 Show that y dx + x dy + 4 dz is exact and evaluate the integral (2,3,-1) y dx + x dy + 4 dz (1,1,1) over any
Let S be the surface of the portion of the solid sphere x2 + y2 + z2 ≤ a2 that lies in the first octant and letCalculate(∇ƒ · n is the derivative of ƒ in the direction of outward normal n.) f(x, y, z) = ln√x² + y² +
Verify Stokes’ Theorem for the vector field F = 2xyi + xj + ( y + z)k and surface z = 4 - x2 - y2, z ≥ 0, oriented with unit normal n pointing upward. THEOREM 6-Stokes' Theorem Let S be a piecewise smooth oriented surface having a piecewise smooth boundary curve C. Let F = Mi + Nj + Pk be
The state of Wyoming is bounded by the meridians 111°3′ and 104°3′ west longitude and by the circles 41° and 45° north latitude. Assuming that Earth is a sphere of radius R = 3959 mi, find the area of Wyoming.
Use a parametrization to find the fluxacross the surface in the specified direction.Outward (normal away from the x-axis) through the surface cut from the parabolic cylinder z = 4 - y2 by the planes x = 0, x = 1, and z = 0 JsF.n do JJ S
Use a parametrization to express the area of the surface as a double integral. Then evaluate the integral.The portion of the plane z = -x inside the cylinder x2 + y2 = 4
Find the counterclockwise circulation of F = (y + ex ln y)i + (ex/y)j around the boundary of the region that is bounded above by the curve y = 3 - x2 and below by the curve y = x4 + 1.
Find parametrizations for the surfaces.The portion of the sphere x2 + y2 + z2 = 36 between the planes z = -3 and z = 3√3
Find the work done by F in moving a particle once counterclockwise around the given curve.F = 2xy3i + 4x2y2jC: The boundary of the “triangular” region in the first quadrant enclosed by the x-axis, the line x = 1, and the curve y = x3
Use a parametrization to express the area of the surface as a double integral. Then evaluate the integral.The portion of the cone z = 2√x2 + y2 between the planes z = 2 and z = 6
Use a parametrization to find the fluxacross the surface in the specified direction.Outward (normal away from the yz-plane) through the surface cut from the parabolic cylinder y = x2, -1 ≤ x ≤ 1, by the planes z = 0 and z = 2 JsF.n do JJ S
Let F = ( y cos 2x)i + ( y2 sin 2x)j + (x2y + z)k. Is there a vector field A such that F = ∇ * A? Explain your answer.
Find the work done by F in moving a particle once counterclockwise around the given curve.F = (4x - 2y)i + (2x - 4y)jC: The circle (x - 2)2 + (y - 2)2 = 4
Use a parametrization to express the area of the surface as a double integral. Then evaluate the integral.The portion of the cone z = √x2 + y2/3 between the planes z = 1 and z = 4/3
Find parametrizations for the surfaces.The portion of the paraboloid z = -(x2 + y2)/2 above the plane z = -2
Although they are not defined on all of space R3, the fields associated with are conservative. Find a potential function for each field and evaluate the integrals as in Example 6. EXAMPLE 6 Show that y dx + x dy + 4 dz is exact and evaluate the integral (2,3,-1) y dx + x dy + 4 dz (1,1,1) over any
Use Equation (8) and Stokes’ Theorem to show that the circulations of the following fields around the boundary of any smooth orientable surface in space are zero. a. F = 2xi + 2yj + 2zk c. F = V X (xi + yj + zk) d. F = Vf b. F = V(xy²7³)
Apply Green’s Theorem to evaluate the integrals. f (y² dx + x² dy) C C: The triangle bounded by X = 0, x + y = 1, y = 0
Find parametrizations for the surfaces.The cone z = 1 + √x2 + y2, z ≤ 3
Use a parametrization to express the area of the surface as a double integral. Then evaluate the integral.The portion of the cylinder x2 + y2 = 1 between the planes z = 1 and z = 4
Although they are not defined on all of space R3, the fields associated with are conservative. Find a potential function for each field and evaluate the integrals as in Example 6. EXAMPLE 6 Show that y dx + x dy + 4 dz is exact and evaluate the integral (2,3,-1) y dx + x dy + 4 dz (1,1,1) over any
Let F be a field whose components have continuous first partial derivatives throughout a portion of space containing a region D bounded by a smooth closed surface S. If |F| ≤ 1, can any bound be placed on the size ofGive reasons for your answer. [ D V.F dV?
Use a parametrization to find the fluxacross the surface in the specified direction.Across the portion of the sphere x2 + y2 + z2 = a2 in the first octant in the direction away from the origin JsF.n do JJ S
Let ƒ(x, y, z) = (x2 + y2 + z2)-1/2. Show that the clockwise circulation of the field F = ∇ƒ around the circle x2 + y2 = a2 in the xy-plane is zeroa. By taking r = (a cos t)i + (a sin t)j, 0 ≤ t ≤ 2π, and integrating F · dr over the circle.b. By applying Stokes’ Theorem. THEOREM
Find parametrizations for the surfaces.The portion of the plane 4x + 2y + 4z = 12 that lies above the square 0 ≤ x ≤ 2, 0 ≤ y ≤ 2 in the first quadrant
Use a parametrization to express the area of the surface as a double integral. Then evaluate the integral.The portion of the cylinder x2 + z2 = 10 between the planes y = -1 and y = 1
Show that the values of the integrals do not depend on the path taken from A to B. B z² dx + 2y dy + 2xz dz A
Apply Green’s Theorem to evaluate the integrals.C: Any simple closed curve in the plane for which Green’s Theorem holds $ C (2x + y2) dx + (2xy + 3y) dy
Use a parametrization to find the fluxacross the surface in the specified direction.Outward through the portion of the cylinder x2 + y2 = 1 cut by the planes z = 0 and z = a JsF.n do JJ S
Find parametrizations for the surfaces.The portion of the hemisphere x2 + y2 + z2 = 10, y ≥ 0, in the first octant
Show that if F = xi + yj + zk, then ∇ * F = 0.
Use a parametrization to express the area of the surface as a double integral. Then evaluate the integral.The portion of the paraboloid z = x2 + y2 between the planes z = 1 and z = 4
Compute the net outward flux of the vector field F = (xi + yj + zk)/(x2 + y2 + z2)3/2 across the ellipsoid 9x2 + 4y2 + 6z2 = 36.
Find a vector field with twice-differentiable components whose curl is xi + yj + zk or prove that no such field exists.
Use the Green’s Theorem area formula given above to find the areas of the regions enclosed by the curvesThe circle r(t) = (a cos t)i + (a sin t)j, 0 ≤ t ≤ 2πIf a simple closed curve C in the plane and the region R it encloses satisfy the hypotheses of Green’s Theorem, the area of R is
Use the Green’s Theorem area formula given above to find the areas of the regions enclosed by the curves.The ellipse r(t) = (a cos t)i + (b sin t)j, 0 ≤ t ≤ 2πIf a simple closed curve C in the plane and the region R it encloses satisfy the hypotheses of Green’s Theorem, the area of R is
Show that the values of the integrals do not depend on the path taken from A to B. B ³x dx + ydy + z dz √x² + y² + z ² ΤΑ А
Let F be a differentiable vector field and let g(x, y, z) be a differentiable scalar function. Verify the following identities. a. V (gF) =gV F + Vg • F b. VX (gF) = gV XF + Vg X F
Use a parametrization to find the fluxacross the surface in the specified direction.Outward (normal away from the z-axis) through the cone z = √x2 + y2, 0 ≤ z ≤ 1 JsF.n do JJ S
Does Stokes’ Theorem say anything special about circulation in a field whose curl is zero? Give reasons for your answer. THEOREM 6-Stokes' Theorem Let S be a piecewise smooth oriented surface having a piecewise smooth boundary curve C. Let F = Mi + Nj + Pk be a vector field whose components have
If F = Mi + Nj + Pk is a differentiable vector field, we define the notation F · ∇ to meanFor differentiable vector fields F1 and F2, verify the following identities. Mº Əx + NO dy + po əz
Let F1 and F2 be differentiable vector fields and let a and b be arbitrary real constants. Verify the following identities. a. V. (aF₁ + bF₂) = a√• F₁ +bV.F₂ b. VX (aF₁+bF₂) = a × F₁ + bV × F₂ X V. (F₁× F₂) = F₂.V × F₁ X 1 c. V F₁V X F₂ 2
Use a parametrization to find the fluxacross the surface in the specified direction.Outward (normal away from the z-axis) through the cone z = √x2 + y2, 0 ≤ z ≤ 2 JsF.n do JJ S
Show that the curl ofis zero but thatis not zero if C is the circle x2 + y2 = 1 in the xy-plane. (Theorem 7 does not apply here because the domain of F is not simply connected. The field F is not defined along the z-axis so there is no way to contract C to a point without leaving the domain of F.)
Let R be a region in the xy-plane that is bounded by a piecewise smooth simple closed curve C and suppose that the moments of inertia of R about the x- and y-axes are known to be Ix and Iy . Evaluate the integralwherein terms of Ix and Iy. C V(4) n ds,
Use the Green’s Theorem area formula given above to find the areas of the regions enclosed by the curvesThe astroid r(t) = (cos3 t)i + (sin3 t)j, 0 ≤ t ≤ 2πIf a simple closed curve C in the plane and the region R it encloses satisfy the hypotheses of Green’s Theorem, the area of R is given
Find a potential function for F. F 2 — A+ (). = ܕܐ {(x, y): > 0}
Use a parametrization to express the area of the surface as a double integral. Then evaluate the integral.The lower portion cut from the sphere x2 + y2 + z2 = 2 by the cone z = √x2 + y2
Find the surface area of the helicoid r(r, θ) = (r cos θ)i + (r sin θ)j + θk, 0 ≤ θ ≤ 2π, 0 ≤ r ≤ 1, in the accompanying figure. (1, 0, 2TT) (1, 0, 0) X N 2TT
Use the Green’s Theorem area formula given above to find the areas of the regions enclosed by the curves.One arch of the cycloid x = t - sin t, y = 1 - cos tIf a simple closed curve C in the plane and the region R it encloses satisfy the hypotheses of Green’s Theorem, the area of R is given
Find a potential function for F. F = (eln y)i + ( = y + sin z + (y cos z)k
Use a parametrization to find the fluxacross the surface in the specified direction.Outward (normal away from the z-axis) through the portion of the cone z = √x2 + y2 between the planes z = 1 and z = 2 JsF.n do JJ S
A function ƒ(x, y, z) is said to be harmonic in a region D in space if it satisfies the Laplace equationthroughout D.a. Suppose that ƒ is harmonic throughout a bounded region D enclosed by a smooth surface S and that n is the chosen unit normal vector on S. Show that the integral over S of ∇ƒ
Use a parametrization to express the area of the surface as a double integral. Then evaluate the integral.The portion of the sphere x2 + y2 + z2 = 4 between the planes z = -1 and z = √3
Apply Green’s Theorem to evaluate the integrals. $ C C: The boundary of 0 ≤ x ≤ π, 0 ≤ y ≤ sin x (3y dx + 2x dy)
Evaluatealong the line segment C joining (0, 0, 0) to (0, 3, 4). 10.1² C x² dx + yz dy + (y²/2) dz
Use a parametrization to find the fluxacross the surface in the specified direction.Upward across the portion of the plane x + y + z = 2a that lies above the square 0 ≤ x ≤ a, 0 ≤ y ≤ a, in the xy-plane JsF.n do JJ S
Use a parametrization to find the fluxacross the surface in the specified direction.Across the sphere x2 + y2 + z2 = a2 in the direction away from the origin JsF.n do JJ S
Calculate the net outward flux of the vector fieldover the surface S surrounding the region D bounded by the planes y = 0, z = 0, z = 2 - y and the parabolic cylinder z = 1 - x2. F = xyi + (sin xz + y²)j + (e¹y² + x)k
Apply Green’s Theorem to evaluate the integrals. $ f (6y + x) dx + (y + 2x) dy C C: The circle (x 2)² + (y - 3)² = 4
Let C be a simple closed smooth curve in the plane 2x + 2y + z = 2, oriented as shown here. Show thatdepends only on the area of the region enclosed by C and not on the position or shape of C. X √ 2y dx + 3z dy - x dz C 1 Z I -2 1 C 2x + 2y + z = 2 y
Use a parametrization to express the area of the surface as a double integral. Then evaluate the integral.The cap cut from the paraboloid z = 2 - x2 - y2 by the cone z = √x2 + y2
Among all rectangular solids defined by the inequalities 0 ≤ x ≤ a, 0 ≤ y ≤ b, 0 ≤ z ≤ 1, find the one for which the total flux of F = (-x2 - 4xy)i - 6yzj + 12zk outward through the six sides is greatest. What is the greatest flux?
Find parametrizations for the surfaces.The portion of the paraboloid y = 2(x2 + z2), y ≤ 2, that lies above the xy-plane
Interchange ƒ and g in Equation (10) to obtain a similar formula. Then subtract this formula from Equation (10) to show thatThis equation is Green’s second formula.Data from Exercise 29Suppose that ƒ and g are scalar functions with continuous first- and second-order partial derivatives
Find the work done by F = eyzi + (xzeyz + z cos y)j + (xyeyz + sin y)k over the following paths from (1, 0, 1) to (1, π/2, 0).a. The line segment x = 1, y = πt/2, z = 1 - t, 0 ≤ t ≤ 1b. The line segment from (1, 0, 1) to the origin followed by the line segment from the origin to (1, π/2,
Which of the fields are conservative, and which are not?F = (xi + yj + zk)/(x2 + y2 + z2)3/2
Suppose that ƒ and g are scalar functions with continuous first- and second-order partial derivatives throughout a region D that is bounded by a closed piecewise smooth surface S. Show thatEquation (10) is Green’s first formula. S fVg n do = ff (f V²g + Vf. Vg) dV. D (10)
Find the surface integral of the field F over the portion of the given surface in the specified direction.F(x, y, z) = -i + 2j + 3kS: rectangular surface z = 0, 0 ≤ x ≤ 2, 0 ≤ y ≤ 3, direction k
Let C be the boundary of a region on which Green’s Theorem holds. Use Green’s Theorem to calculateIf a simple closed curve C in the plane and the region R it encloses satisfy the hypotheses of Green’s Theorem, the area of R is given byThe reason is that by Equation (4), run backward, a. b. $
Find the work done by F = (x2 + y)i + (y2 + x)j + zezk over the following paths from (1, 0, 0) to (1, 0, 1).a. The line segment x = 1, y = 0, 0 ≤ z ≤ 1b. The helix r(t) = (cos t)i + (sin t)j + (t/2π)k, 0 ≤ t ≤ 2πc. The x-axis from (1, 0, 0) to (0, 0, 0) followed by the parabola z = x2, y
Which of the fields are conservative, and which are not?F = xi + yj + zk
Use a parametrization to find the fluxacross the surface in the specified direction.F = 4xi + 4yj + 2k outward (normal away from the z-axis) through the surface cut from the bottom of the paraboloid z = x2 + y2 by the plane z = 1 JsF.n do JJ S
a. A torus of revolution (doughnut) is obtained by rotating a circle C in the xz-plane about the z-axis in space. If C has radius r > 0 and center (R, 0, 0), show that a parametrization of the torus iswhere 0 ≤ u ≤ 2π and 0 ≤ y ≤ 2π are the angles in the figure.b. Show that the surface
Find the surface integral of the field F over the portion of the given surface in the specified direction.F(x, y, z) = yx2i - 2j + xzkS: rectangular surface y = 0, -1 ≤ x ≤ 2, 2 ≤ z ≤ 7, direction -j
Let v(t, x, y, z) be a continuously differentiable vector field over the region D in space and let p(t, x, y, z) be a continuously differentiable scalar function. The variable t represents the time domain. The Law of Conservation of Mass asserts thatwhere S is the surface enclosing D.a. Give a
Which of the fields are conservative, and which are not?F = xeyi + yezj + zexk
Use Equation (7) to find the surface integral of the field F over the portion of the sphere x2 + y2 + z2 = a2 in the first octant in the direction away from the origin.F(x, y, z) = zk Flux = - [[F₁ F.n do JJ ( R F ff F R +Vg |Vg| VgVg p +Vg Vg p -dA. dA (7)
Which of the fields are conservative, and which are not?F = (i + zj + yk)/(x + yz)
Suppose that the parametrized curve C: (ƒ(u), g(u)) is revolved about the x-axis, where g(u) > 0 for a ≤ u ≤ b.a. Show thatis a parametrization of the resulting surface of revolution, where 0 ≤ ν ≤ 2π is the angle from the xy-plane to the point r(u, ν) on the surface. Notice that
Let Iy be the moment of inertia about the y-axis of the region in Exercise 35. Show thatData from in Exercise 35Let A be the area and x̄ the x-coordinate of the centroid of a region R that is bounded by a piecewise smooth, simple closed curve C in the xy-plane. Show that $x dy - x²y dx = ly. ¼ f
Find the work done by each field along the paths from (0, 0, 0) to (1, 1, 1) in Exercise 1.F = 2xyi + x2j + kData from Exercise 1The accompanying figure shows two polygonal paths in space joining the origin to the point (1, 1, 1). Integrate ƒ(x, y, z) = 2x - 3y2 - 2z + 3 over each path. NE (0, 0,
Let A be the area and x̄ the x-coordinate of the centroid of a region R that is bounded by a piecewise smooth, simple closed curve C in the xy-plane. Show that 2 1 f x² d y = -√xy dx C C 3 C x² dy - xy dx = AX.
Use Equation (7) to find the surface integral of the field F over the portion of the sphere x2 + y2 + z2 = a2 in the first octant in the direction away from the origin.F(x, y, z) = xi + yj + zk Flux = - ff F₂ F.n do |Vg| JJ (₁ F R ± √g Vg|Vg pl ff F R +Vg Vg.p -dA. dA
Find the work done by each field along the paths from (0, 0, 0) to (1, 1, 1) in Exercise 1.F = 2xyi + j + x2kData from Exercise 1The accompanying figure shows two polygonal paths in space joining the origin to the point (1, 1, 1). Integrate ƒ(x, y, z) = 2x - 3y2 - 2z + 3 over each path. NE (0, 0,
Find a parametrization of the hyperboloid of two sheets (z2/c2) - (x2/a2) - (y2/b2) = 1.
Use Equation (7) to find the surface integral of the field F over the portion of the sphere x2 + y2 + z2 = a2 in the first octant in the direction away from the origin.F(x, y, z) = zxi + zyj + z2k Flux = - ff F₂ F.n do |Vg| JJ (₁ F R ± √g Vg|Vg pl ff F R +Vg Vg.p -dA. dA
Suppose that a nonnegative function y = ƒ(x) has a continuous first derivative on [a, b]. Let C be the boundary of the region in the xy-plane that is bounded below by the x-axis, above by the graph of ƒ, and on the sides by the lines x = a and x = b. Show that So a f(x) dx -fydr. C с
By experiment, you find that a force field F performs only half as much work in moving an object along path C1 from A to B as it does in moving the object along path C2 from A to B. What can you conclude about F? Give reasons for your answer.
Suppose that F = ∇ƒ is a conservative vector field andShow that ∇g = F. g(x, y, z) p(x,y,z) So (0,0,0) F. dr.
Use Equation (7) to find the surface integral of the field F over the portion of the sphere x2 + y2 + z2 = a2 in the first octant in the direction away from the origin.F(x, y, z) = yi - xj + k Flux = - ff F₂ F.n do |Vg| JJ (₁ F R ± √g Vg|Vg pl ff F R +Vg Vg.p -dA. dA
Show that if R is a region in the plane bounded by a piecewise smooth, simple closed curve C, then Area of R = fx dy = -fydx.
You have been asked to find the path along which a force field F will perform the least work in moving a particle between two locations. A quick calculation on your part shows F to be conservative. How should you respond? Give reasons for your answer.
Find potential functions for the field.F = (z cos xz)i + eyj + (x cos xz)k
Use Equation (7) to find the surface integral of the field F over the portion of the sphere x2 + y2 + z2 = a2 in the first octant in the direction away from the origin.F(x, y, z) = -yi + xj Flux = - ff F₂ F.n do |Vg| JJ (₁ F R ± √g Vg|Vg pl ff F R +Vg Vg.p -dA. dA
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