Any help would be greatly appreciated

Been given a problem as part of an assignment and myself and fellow students don't even know where to start. A point in the right direction would be greatly appreciated.

x1 = -(Q / 2 pi k L)ln r1 and x2 = -(Q / 2 pi k L)ln r1

Show that Q = -(2 pi k L (x1 - x2)) / ln (r2/r1)

Help me Obi Wan, you're my only hope!

Original post by barryg741

Been given a problem as part of an assignment and myself and fellow students don't even know where to start. A point in the right direction would be greatly appreciated.

x1 = -(Q / 2 pi k L)ln r1 and x2 = -(Q / 2 pi k L)ln r1

Show that Q = -(2 pi k L (x1 - x2)) / ln (r2/r1)

Help me Obi Wan, you're my only hope!

Why don't you find an expression for

x_1 - x_2

?

Reply 2

barryg741

OP

Original post by Mr M

Why don't you find an expression for

x_1 - x_2

?

Thanks for your time. I don't suppose a massive shoulder barge in the right direction would be possible?

Original post by barryg741

Thanks for your time. I don't suppose a massive shoulder barge in the right direction would be possible?

Anything else would be doing the question for you. You just need to subtract the second equation from the first. You should obtain something that easily rearranges to the answer you are seeking.

Edit: I should probably point out that one of your