Xin the reaction a b + c + heat, there is a net input of energy the potential energy of the products is greater than that of the reactant the potential energy of the products is the same as that of the reactant the potential energy of the products is less than that of the reactant entropy has decreased

Sally turns on her cellular telephone to speak to her friend who is located thousands of miles away. which of the following best describes how such a telephone is able to transmit and receive information? a. the cellular telephone transmits, receives, and encodes information using only sound waves. b. the cellular telephone transmits, receives, and encodes information using only electromagnetic waves. c. the cellular telephone transmits information by electromagnetic waves to a receiver which then encodes them and produces sound. d. the cellular telephone transmits information by sound waves to a receiver which then encodes them and produces electromagnetic waves.