A man on an airplane is walking toward the back of the airplane at 7 m/s. The plane is flying west at 245 m/s. What is the speed and direction of the man relative to the ground?.

In a particular chemical reaction, the energy of the reactants is 30 kj and the energy of the products is 5 kj. 
 the maximum energy of the system is 40 kj. sketch a potential energy diagram for this reaction. make sure to label the energy of the reactants, the energy of the products, the activation energy, and the enthalpy change for the reaction.