Unlike secondary pollutants, pollutants are
released directly into the air by natural processes or by human
activities

This energy transformation diagram represents the energy of a skateboarder moving along a half-pipe. as she skates toward the top of the half-pipe, her original kinetic energy is converted to potential energy and friction. how much of the energy is potential?

What describes the particles in a liquid

Why does a collision with an airbag cause less damage than a collision with a steering wheel