Which is the corresponding formula equation?

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

When flexing to a reflective style, one should be specific, brief and to the point, and maintain a fast and decisive pace?

How does changing the frequency affect the energy of the wave?