A student used a computer simulation to investigate how the kinetic energy of an object changes as the objects mass changes. The object moves at a constant speed during the simulation. The graph shows the kinetic energy of the object
with three different masses. The student also ran the simulation with a fourth mass of 8 kg, which is not shown on the
graph.

Silver tarnishes as silver metal reacts with hydrogen sulfide, h2s, in the air. in this reaction, dark silver sulfide, au2s, covers the surface of silver. when silver is polished, this coating of silver sulfide can be removed from the surface. this makes the silver shiny again. enter the coefficients that balance the tarnishing reaction equation. (type 1 for no coefficient.)