Electric Force charge magnitude

[Octoshark]

Homework Statement

A 1.0-C charge is 15 m from a second charge, and the force between them is 1.0 N.
What is the magnitude of the second charge?

Homework Equations

F = k(q1)(q2)/r^2

The Attempt at a Solution

F = k(q1)(q2)/r^2 need to solve for q2 so...

F(r^2)/k(q1) = q2

1N(225m)/(9x10^9)(1C) = 25nC

That is correct, right? I just wasn't sure because this is on my sample exam, but we never used nano numbers during class so I wanted to double check.

 

[xcvxcvvc]

Homework Statement

A 1.0-C charge is 15 m from a second charge, and the force between them is 1.0 N.
What is the magnitude of the second charge?

Homework Equations

F = k(q1)(q2)/r^2

The Attempt at a Solution

F = k(q1)(q2)/r^2 need to solve for q2 so...

F(r^2)/k(q1) = q2

1N(225m)/(9x10^9)(1C) = 25nC

That is correct, right? I just wasn't sure because this is on my sample exam, but we never used nano numbers during class so I wanted to double check.

though i didn't actually calculate it, your setup looks right. nC is a common measure of charge.