Aparticle of mass m = 1 oscillates without friction attached to a spring with k = 4. the motion of the particle is driven by the external force f(t) = 3 t cos(t). find the equation of motion and solve it. discuss the physical meaning of the solution.

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

i believe the answer is a hope it and is correct

3. dark matter

empty space could also be a simple vacuum