laws and theories in science. which of the following is a law of science? A)a living thing is made of at least one cell B)an atom is made of at least one cell. C)gravity will pull two more objects towards each other. D)natural selection will change species to fit their environment

the correct answer should be false

{apex}

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.

ask your friends for what they got then copy it down if you don't have any friends which is fine than google it or pay the teacher

c is the correct answer!