A 15 g bullet travelling at 200 m/s strikes a 3 kg block of wood. A) If the bullet remains inside the block, how fast will the bullet and the block
move together? B) If the bullet emerges from the block at 120 m/s, how
fast is the block moving?

answer: electrons

luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.