Two people timed an object with a stop watch . they each got a slightly different result how could this be ?

They both got slightly different results because as humans we are not that accurate enough to start and stop the stop watches accurate. Plus stop watches are not reliable

your answer would be fusion

the earths atmosphere is made up of nitrogen and oxygen. solids can turn into gasses through a process called sublimation. sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.

hope this : d