a metre rule is balanced on a pivot by three vertical forces as shown in the diagram the moment of the 5.0 N force about the pivot is 200 N cm calculate the size of force f​ please answer asap​

Convection currents are caused by differences in what two things?

The horizontal blue line through the middle of the lens is called the optical axis. as the lamp is moved above or below the axis, keeping the horizontal distance to the center of the lens constant, how does the horizontal distance from the lens to the image change?

The field lines around one end of a bar magnet are shown below based on the diagram, what can you conclude about the pole of the magnet? a.is a south pole because the field hnes spread out from this end b.a north pole because the field lines spread out from this end c.a nouth pole because the field lines enter the magnet at this end d.is a north pole because the field lines enter the magnet at this end