Find the gravitational potential energy of a body of mass 25kg, kept at a height of 4m If g=10m/s'.

iron would move it is magnetic there is a mag field around the current in the wire

igneous rocks also form where plates converge. the subducting plate melts as it sinks into the crust of the earth, and the melt rises into the overriding plate forming volcanoes. metamorphic rocks are formed mainly in the lithosphere, wherever there is high pressure and high temperature. -woods