1george holds a magnet above a pile of paper clips. the paper clips move toward the magnet and stick to it before the magnet actually touches it. a magnet is surrounded by which applies a push or a pull to an object without actually touching it. a. a magnetic field b. a simple machine c. an electric current d. a generator

An inclined plane wrapped around a metal shaft is a a. lever b. screw c. pulley d. wedge

Quantum mechanics applies to subatomic, atomic, nanometer-size, and micrometer-size systems. nanometer, micrometer, and kilometer-size systems. atomic, nanometer-size, and micrometer-size systems. subatomic, atomic, and nanometer-size systems.

Two steel balls, each of mass m, are welded to a light rod of length l and negligible mass and are initially at rest on a smooth horizontal surface. a horizontal force of magnitude f is suddenly applied to the rod as shown. determine (a) the instantaneous acceleration a of the mass center g and (b) the corresponding rate at which the angular velocity of the assembly about g is changing with time.