Which best explains why a wood burning fireplace represents an open system

What is created when solids,liquids,an gases mix with one another

The act of moving from one place to another. a. locomotor b. aerobic c. stationary d. static

Amodel rocket with a mass of 0.212 kg is launched into the air with an initial speed of 84 m/s. how much kinetic energy will the rocket have at a height of 214 m? assume there is no wind resistance. 634 j 303 j