A long uniform line of charge (like a charged length of wire) has an electric field strength of 870 N/C at a distance from 0.315 m from the line. How much charge is present in a section of the line length 2.40 cm

What would be the result of an alpha particle coming into a magnetic field? a) the alpha particle will stop moving. b) the alpha particle will reverse its direction. c) the alpha particle will be deflected in a curve path. d) the alpha particle will continue to travel in a straight line.

The mass of a bowling ball is 10 kg and the mass of a ping pong ball is 0.015 kg. if the two objects are 5 meters apart, what is the gravitational force ?

Convection currents are caused by differences in what two things?