18. *** Las magnitudes de los cuatro vectores de desplazamiento que se muestran en la figura son A -16.0 m. B-11.0 m, C -12.0 m y D- 26.0 m. a) Determine la magnitud, y b) el ángulo
direccional de la resultante que ocurre cuando estos vectores se suman.

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