Part of the computer that contain the Brian is called ?

Explanation:

The CPU (Central Processing Unit)

The CPU is also known as the processor or microprocessor. The CPU is responsible for executing a sequence of stored instructions called a program.

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.