Is mixture of salt, sand, and iron fillings homogeneous or heterogeneous? Explain.

Which subatomic particle has a negative charge

A58-kg boy swings a baseball bat, which causes a 0.140-kg baseball to move toward third base with a velocity of 38.0 m/s.

Which best term to describe a chemical reaction that absorbs energy from its surroundings? a. thermal conductor b. thermal insulator c. endothermic d. exothermic