Problem 39E: True or False? Line integral cf(x,y)dsis equal to a definite integral if C is a smooth curve defined... Problem 40E: True or False? Vector functions r1= ti +t2j, 0t1,and r2=(1 —t)i+(1 —t)2j, 0t1, define the same... Problem 41E: True or False? c(Pdx+Qdy)=c(PdxQdy) Problem 42E: True or False? A piecewise smooth cuive C consists of a finite number of smooth cuives that are... Problem 43E: True or False?If C is given by x(t) = t,y(t) = t,0 t1. then xvds=fr2d,. Problem 44E: For the following exercises, use a computer algebra system (CAS) to evaluate the line integrals over... Problem 45E: For the following exercises, use a computer algebra system (CAS) to evaluate the line integrals over... Problem 46E: For the following exercises, use a computer algebra system (CAS) to evaluate the line integrals over... Problem 47E: For the following exercises, use a computer algebra system (CAS) to evaluate the line integrals over... Problem 48E: For the following exercises, use a computer algebra system (CAS) to evaluate the line integrals over... Problem 49E: For the following exercises, find the work done. 49. Find the work done by vector field... Problem 50E: For the following exercises, find the work done. 50. Find the work done by a person weighing 150 lb... Problem 51E: For the following exercises, find the work done. 51. Find the work done by force field... Problem 52E: For the following exercises, find the work done. 52. Find the work done by vector field... Problem 53E: For the following exercises, find the work done. 53. Find the work done by force... Problem 54E: For the following exercises, find the work done. 54. Find the mass of a wire in the shape of a... Problem 55E: For the following exercises, evaluate the line integrals. 55. Evaluate cF.dr,where F(x,y)=1j, and C... Problem 56E: For the following exercises, evaluate the line integrals. 56. Evaluate c( x 2 + y 2 + z 2 )1ds,where... Problem 57E: For the following exercises, evaluate the line integrals. 57. Evaluate cyzdx+xzdy+xydzover the line... Problem 58E: For the following exercises, evaluate the line integrals. 58. Let C be the line segment from point... Problem 59E: For the following exercises, evaluate the line integrals. 59. [T] Use a computer algebra system to... Problem 60E: For the following exercises, evaluate the line integrals. 60. [T] Use a computer algebra system to... Problem 61E: For the following exercises, evaluate the line integrals. 61. [T] Use a CAS to evaluate line... Problem 62E: For the following exercises, evaluate the line integrals. 62. Evaluate line integral... Problem 63E: For the following exercises, evaluate the line integrals 63. [T] Use a CAS to evaluate yc2 x 2 y... Problem 64E: For the following exercises, evaluate the line integrals 64. [T] Use a CAS to evaluate cxyds,where C... Problem 65E: In the following exercises, find the work done by force fiel d F on an object moving along the... Problem 66E: In the following exercises, find the work done by force fiel d F on an object moving along the... Problem 67E: In the following exercises, find the work done by force fiel d F on an object moving along the... Problem 68E: In the following exercises, find the work done by force field F on an object moving along the... Problem 69E: In the following exercises, find the work done by force fiel d F on an object moving along the... Problem 70E: In the following exercises, find the work done by force fiel d F on an object moving along the... Problem 71E: In the following exercises, find the work done by force fiel d F on an object moving along the... Problem 72E: In the following exercises, find the work done by force fiel d F on an object moving along the... Problem 73E: In the following exercises, find the work done by force fiel d F on an object moving along the... Problem 74E: In the following exercises, find the work done by force fiel d F on an object moving along the... Problem 75E: Evaluate the line integral of scalar function xy along parabolic path y = x2connecting the origin to... Problem 76E: Find yc2dx+(xy x 2)dy along C: y = 3x from C (0, 0) to (1, 3). Problem 77E: Find yc2dx+(xy x 2)dyalong C: y2= 9x from (0, 0) to (1, 3). Problem 78E: For the following exercises, use a CAS to evaluate the given line integrals. 78. [T] Evaluate... Problem 79E: For the following exercises, use a CAS to evaluate the given line integrals. 79. [T] Evaluate line... Problem 80E: For the following exercises, use a CAS to evaluate the given line integrals. 80. [T] Evaluate the... Problem 81E: For the following exercises, use a CAS to evaluate the given line integrals. 81. [T] Evaluate line... Problem 82E: For the following exercises, use a CAS to evaluate the given line integrals. 82. [T] Evaluate line... Problem 83E: For the following exercises, use a CAS to evaluate the given line integrals. 83. [T] Evaluate... Problem 84E: For the following exercises, use a CAS to evaluate the given line integrals. 84. Evaluate cF.dr,... Problem 85E: For the following exercises, use a CAS to evaluate the given line integrals. 85. Find the line... Problem 86E: For the following exercises, use a CAS to evaluate the given line integrals. 86. Find the line... Problem 87E: For the following exercises, find the flux. 87. Compute the flux of F = x2i + yj across a line... Problem 88E: For the following exercises, find the flux. 88. Let F = 5i and let C be curve y=0,0x4 . Find the... Problem 89E: For the following exercises, find the flux. 89. Let F = 5j and let C be curve y = 0. y=0,0x4 . Find... Problem 90E: For the following exercises, find the flux. 90. Let F = -yi + xj and let C: r(t) = cos t + sin tj (... Problem 91E: For the following exercises, find the flux. 91. Let F = (x2+y2)i + (2xy)j. Calculate flux F... Problem 92E: Find the line integral of k c z 2dx+ydy+2ydz,where C consists of two parts: C1 and C2. C1 is the... Problem 93E: A spring is made of a thin wire twisted into the shape of a circular helix x = 2 cos t, y = 2 sin t.... Problem 94E: A thin wire is bent into the shape of a semicircle of radius a. If the linear mass density at point... Problem 95E: An object moves in force field F(x,y,z)=y2i+2(x+1)yj counterclockwise from point (2, 0) along... Problem 96E: Find the work done when an object moves in force field F(x, y ,z) = 2xi — (x + z)j + (y — x)k along... Problem 97E: If an inverse force field F. is given by F(x, y, z) = k r3r, . where k is a constant, find the work... Problem 98E: David and Sandra plan to evaluate line integral cF.dr, along a path in the xy-plane from (0, 0) to... format_list_bulleted