John and Henry push a piano with 800N, and the piano refuses to move. According to the definition of work in physics, there is NO work done on the piano.

more points skills biss

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

the answer to this is proletariats.

hope this : )