Two balls , one weighing 5kg and the other weighing 1kg , are both traveling at the same speed 3m/s A. Define kinetic energy and explain why a ball rolling has kinetic energy.
B. Which ball has more kinetic energy ? Why?

energy and particles

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.