a 4.0 kg railroad car moving at 8.0 ms to the right collides with 1.0 kilogram ball at rest after the collision the 4.0 kg ball moves at 4.8 ms to the right what is the velocity of 1 kg ball

i don’t no. suiopgohjk

substitution is the answer in this case

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.