Which organelle converts the chemical energy stored in food into compounds that are more convenient for the cell to use?

Mitochondra, the organelle, responsible for the conversion of the chemical energy stored in food into ATP (adenosine triphosphate-energy rich molecule). The cell easily utilize these molecules and perform all of its functions

It depends on the surface of the levels. the rougher the surface, the greater is the frictional force. for rougher surfaces, you would need to exert greater force to move the object. the concept is that, you must overcome the frictional force in order to bring the object into motion. this is the reason why we add lubricants to the joints so they could easily move. this answer was on