Lidl 10rce is exerted by the brake cylinders? A factory lift is used to raise a load of 14,325 N on a piston that has an area of
706.8 cm². How much pressure does the lift's engine need to exert on the
hydraulic fluid to lift the required loa

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.