Explanation:
Reversible reactions that happen in a closed system eventually reach equilibrium. At equilibrium, the concentrations of reactants and products do not change. But the forward and reverse reactions have not stopped - they are still going on, and at the same rate as each other.
Answer:
C. The Speed of the ball depends on the force used to kick it.
Explanation:
Varuable, In algebra, a symbol (usually a letter) standing in for an unknown numerical value in an equation :)
