Recent content by SOS2012

thank you very much. i appreciate the help

x²y"(x)-3xy'(x)+3y(x)=2(x^4)(e^x) =>y"(x)-(3/x)y'(x)+(3/x²)y(x)=2x²e^x i don't know how to approach this problem because the coefficients are not constant and i am used to being given y1 and y2 HELP!

E1/E2=2.87 E1=kq1r/(r^2+r^2)^1.5 E2=kq2(2r)/(r^2+(d-r)^2)^1.5 thats the equations i have but i don't know how i would use them in order to get the ratio of q1/q2

Homework Statement Figure 22-42 shows two parallel nonconducting rings with their central axes along a common line. Ring 1 has uniform charge q1 and radius R; ring 2 has uniform charge q2 and the same radius R. The rings are separated by a distance 3.00R. The ratio of the electric field...