Problem 1QCE: The function (x,y,z)=xy+yz+xz is a potential for vector field F=. Problem 2QCE: The vector field F(x,y,z)=, defined for (x,y,z)(0,0,0), is always directed toward the origin and is... Problem 3QCE: An inverse-square field is one that can be written in the form F(r)=. Problem 4QCE: The vector field has divergence and curl
Problem 1ES: Match the vector field F(x,y) with one of the plots, and explain your reasoning. aF(x,y)=xi... Problem 2ES: Match the vector field F(x,y) with one of the plots, and explain your reasoning.... Problem 3ES: Determine whether the statement about the vector field F(x,y) is true or false. If false, explain... Problem 4ES: Determine whether the statement about the vector field F(x,y) is true or false. If false. explain... Problem 5ES: Sketch the vector field by drawing some representative nonintersecting vectors. The vectors need not... Problem 6ES: Sketch the vector field by drawing some representative nonintersecting vectors. The vectors need not... Problem 7ES: Sketch the vector field by drawing some representative nonintersecting vectors. The vectors need not... Problem 8ES: Sketch the vector field by drawing some representative nonintersecting vectors. The vectors need not... Problem 9ES: Use a graphing utility to generate a plot of the vector field. F(x,y)=i+cosyj Problem 10ES: Use a graphing utility to generate a plot of the vector field. F(x,y)=yixj Problem 11ES: Determine whether the statement is true or false. Explain your answer. The vector-valued function... Problem 12ES: Determine whether the statement is true or false. Explain your answer. If r is a radius vector in... Problem 13ES: Determine whether the statement is true or false. Explain your answer. If F is a vector field, then... Problem 14ES: Determine whether the statement is true or false. Explain your answer. If F is a vector field and... Problem 15ES: Confirm that is a potential function for F(r) on some region, and state the region.... Problem 16ES: Confirm that is a potential function for F(r) on some region, and state the region.... Problem 17ES: Find div F and curl F . F(x,y,z)=x2i2j+yzk Problem 18ES: Find div F and curl F . F(x,y,z)=xz3i+2y4x2j+5z2yk Problem 19ES: Find div and curl .
Problem 20ES: Find div and curl .
Problem 21ES: Find div F and curl F . F(x,y,z)=1x2+y2+z2(xi+yj+zk) Problem 22ES: Find div F and curl F . F(x,y,z)=lnxi+exyzj+tan1(z/x)k Problem 23ES: Find(FG).F(x,y,z)=2xi+j+4ykG(x,y,z)=xi+yjzk Problem 24ES: Find(FG).F(x,y,z)=yzi+xzj+xykG(x,y,z)=xyj+xyzk Problem 25ES: Find(F).F(x,y,z)=sinxi+cos(xy)j+zk Problem 26ES: Find(F).F(x,y,z)=exzi+3xeyjeyzk Problem 27ES: Find(F).F(x,y,z)=xyj+xyzk Problem 28ES: Find(F).F(x,y,z)=y2xi3yzj+xyk Problem 29ES: Use a CAS to check the calculations in Exercises 23, 25, and 27. Problem 30ES: Use a CAS to check the calculations in Exercises 24, 26 and 28. Problem 31ES: Let k be a constant, F=F(x,y,z),G=G(x,y,z), and =(x,y,z). Prove the following identities, assuming... Problem 32ES: Let k be a constant, F=F(x,y,z),G=G(x,y,z), and =(x,y,z). Prove the following identities, assuming... Problem 33ES: Let k be a constant, F=F(x,y,z),G=G(x,y,z), and =(x,y,z). Prove the following identities, assuming... Problem 34ES: Let k be a constant, F=F(x,y,z),G=G(x,y,z), and =(x,y,z). Prove the following identities, assuming... Problem 35ES: Let k be a constant, F=F(x,y,z),G=G(x,y,z), and =(x,y,z). Prove the following identities, assuming... Problem 36ES: Let k be a constant, F=F(x,y,z),G=G(x,y,z), and =(x,y,z). Prove the following identities, assuming... Problem 37ES: Let k be a constant, F=F(x,y,z),G=G(x,y,z), and =(x,y,z). Prove the following identities, assuming... Problem 38ES: Let k be a constant, F=F(x,y,z),G=G(x,y,z), and =(x,y,z). Prove the following identities, assuming... Problem 39ES: Rewrite the identities in Exercises 31, 33, 35, and 37 in an equivalent form using the notation for... Problem 40ES: Rewrite the identities in Exercises 32, 34, 36, and 38 in an equivalent from using notation for... Problem 41ES: Verify that the radius vector r=xi+yj+zk has the stated property. acurlr=0br=rr Problem 42ES: Verify that the radius vector r=xi+yj+zk has the stated property. adivr=3b1r=rr3 Problem 43ES: Letr=xi+yj+zk,letr=r,letf be a differentiable function of one variable, and let F(r)=f(r)r. (a) Use... Problem 44ES: (a) Use part (a) of Exercise 43, Exercise 36, and Exercise 41(a) to show that curl F=0. (b) Use the... Problem 45ES: Use the result in Exercise 43(b) to show that the divergence of the inverse-square field F=r/r3 is... Problem 46ES: Use the result of Exercise 43(b) to show that if F is a vector field of the form F=frr and if div... Problem 47ES: A curve C is called a flow line of a vector field F if F is a tangent vector to C at each point... Problem 48ES: Find a differential equation satisfied by the flow lines of F (see Exercise 47), and solve it to... Problem 49ES: Find a differential equation satisfied by the flow lines of F (see Exercise 47), and solve it to... Problem 50ES: Find a differential equation satisfied by the flow lines of F (see Exercise 47), and solve it to... format_list_bulleted