(b² - a²)^1/2

b>a

Find one such f(x).

I have 

integration of  [ t³-1+tcos t  ] dt

with limits -1 to +1.

the two parts are placed perpendicular to each other so that their north poles are together. What is the resultant magnetic moment in terms of m?

will exert a force on the ring if the ring

A) carries a current

B) has uniform charge distribution

C) has non-uniform charge distribution

D)none of the above.