Give the measurement of the line in both centimeters and millimeters. (Assume the line starts at "0") I will give you brain list and explain

In cm: 38.1

Explanation:

We find out that the line is 15 inches then we convert to centimeters:38.1cm.

Now we make 38.1cm in millimeters. I find it easier to convert to millimeters from cm. 38.1cm to mm is 381mm.

force required to detach it is given by

charges are taken to be fundamental charge

now we have

so above is the minimum distance at which it will detach