Recent content by QaH

They are the same? So the final charge will be +2 and +2?

No, but I assumed the positively charged sphere will gain electrons when touched with the negatively charged sphere. An amount equal to -2 μC 6q-2q=4q the negatively charged sphere will have lost electrons equal to -2μC, -2q-(-2q)=0

Homework Statement Two otherwise identical, small conducting spheres have charges +6.0 µC and −2.0 µC. When placed a distance r apart, each experiences an attractive force of 9.1 N. The spheres are then touched together and moved back to a distance r apart. Find the magnitude of the new force...

Homework Statement \int\frac{x^2}{\sqrt{x^2+4}}dx Homework Equations n/a The Attempt at a Solution Letting x=2tan\theta and dx=2sec^2\theta d\theta \int\frac{x^2}{\sqrt{x^2+4}}dx=\int\frac{4tan^2\theta}{\sqrt{4+4tan^2\theta}}2sec^2\theta d\theta=\int\frac{8tan^2\theta...

I changed what I did a bit in the description.

Homework Statement A uniform plank 6.1 m long rests on two supports, 2.5 m apart (see figure below). The gravitational force on the plank is 130 N. The left end of the plank is 1.5 m to the left of the left support, so the plank is not centered on the supports. A person is standing on the plank...