Determina la velocidad de un avión que recorre 459 km en 67 min

Look at the potential energy diagram for a chemical reaction. which statement correctly describes the energy changes that occur in the forward reaction?

Will you chech and finish these for me, because i am stumped with them.

Power can be defined as a. the distance over which work was done. b. how much work can be done in a given time. c. all the work in an given area. d. the energy required to do work.