Recent content by joedirt

Homework Statement A square of side 2R has a circular hole of radius R/2 removed from one quarter (see file attachment). The centre of the hole is located at (R/2, R/2) from the centre. Locate the centre of mass with respect to the centre of the square. Homework Equations The...

I don't know any that's way I'm asking for the equation/s. I know a little about the Kirchhoff's current laws.

Homework Statement A soft iron bar in a solenoid is placed in a circuit. There are two compasses, 1 is on the West side of the iron bar and the other is to the North. The circuit switch is open, which way will be compass needles be pointing? Which way will the compass needles be pointing if...

Calculate electric potential at A, 3.0 m away from a point charge of +1.0 C Calculate the electric potential at B, 6.0 m away from a point charge of +1.0 C How much work would be done moving a +0.2 C charge between A and B I'm not sure what equation/s to use?

Circuits question!? A series RC circuit consists of a 550-µF capacitor (initially uncharged) and a 12-kOhm resistor. The combination is connected across a 12-V battery; 3.0 s later, what is (a) the charge on the capacitor, (b) the current in the resistor? I really just want to know...