Which of the following are true for acceleration? a. the symbol used for acceleration is . b. acceleration is a scalar quantity. c. the si unit for acceleration is minutes per second. d. acceleration describes how the velocity changes in time.

Which type of reaction is shown in this energy diagram? energy products activation energy reactants time o a. endothermic, because energy is released to the surroundings o b. exothermic, because energy is absorbed from the surroundings o c. exothermic, because energy is released to the surroundings o d. endothermic, because energy is absorbed from the surroundings