True or false?
when scientist arrive at contradictory conclusions about the same experimental results, more results, more research may be needed

a

explanation:

because it is and it's just life man

age range would be the answer

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.