A 0.01-kg bob, attached to a string with length L = 1.2 m, has a total energy of 8 J. The angular speed of the bob, θ', when the kinetic energy equals to the half of the potential energy, (K=U/2), is:

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 : )

the doppler effect is used by weather forecasters to measure 

moving clouds