Which of the following factors determines the strength of the frictional force between two surfaces? the amount of heat generated by the frictional the types of surfaces involved the objects' sizes how hard the surfaces push together

Types of surface and how hard they push together

This is what i found “in a gas turbine engine, the combustor or combustion chamber is fed high pressure air by the compression system. early gas turbine engines used a single chamber known as a can type combustor. today three main configurations exist: can, annular and cannular (also referred to as can-annular tubo-annular).” i hope this you for what your looking for. can you plz mark me brainliest?