Review nuclear fission and nuclear fusion by placing X's in the appropriate boxes. (2 points) Nuclear fission Nuclear fusion Converts matter into energy Occurs in nuclear power plants Splits a nucleus Produces radioactive waste Uses hydrogen Occurs in the Sun Uses uranium Creates limited fuel Creates abundant fuel b. What conditions are required for nuclear fusion that prevent it from being used to generate electric energy

Astone is thrown with a speed v0 and returns to earth, as the drawing shows. ignore friction and air resistance, and consider the initial and final locations of the stone. which one of the following correctly describes the change δpe in the gravitational potential energy and the change δke in the kinetic energy of the stone as it moves from its initial to its final location? options a.δpe = 0 j and δke = 0 j b.δpe is positive and δke is negative c.δpe = 0 j and δke is positive d.δpe is negative and δke is positive e.δpe = 0 j and δke is negative