Please I need help Which change will produce a new substance.​

Ill give u brainliest pls how is mass of carbon conserved during cellular respiration

Hey, could someone me answer this? much appreciated!

Mathematically, work = force x distance at coaster world, the tallest rollercoaster is the pinnacle. the top of the first hill is 40 meters high. it takes 160 newtons of force to bring a car to the top of the first hill. it takes 10 seconds to get to the top of the hill. how much work is done? how fast are you travelling, on average, to the top of the first hill? find the  force, distance, time, work, average speed