An engine is a machine A machine is any device that uses energy to perform some activity. In common usage, the meaning is that of a device having parts that perform or assist in performing any type of work. A simple machine is a device that transforms the direction or magnitude of a force without consuming any energy. The word "machine" is derived from the that produces mechanical force and motion from another form of energy (e.g. a fuel source Fuel is any material that is burned or altered to obtain energy and to heat or to move objects. Fuel releases its energy either through a chemical reaction means, such as combustion, or nuclear means, such as nuclear fission or nuclear fusion. An important property of a useful fuel is that its energy can be stored to be released only when needed,, compressed air, or electricity An electric motor uses electrical energy to produce mechanical energy, through the interaction of magnetic fields and current-carrying conductors. The reverse process, producing electrical energy from mechanical energy, is accomplished by a generator or dynamo. Traction motors used on vehicles often perform both tasks. Many types of electric).[1] It is also referred to as a prime mover. An automobile An automobile, motor car or car is a wheeled motor vehicle used for transporting passengers, which also carries its own engine or motor. Most definitions of the term specify that automobiles are designed to run primarily on roads, to have seating for one to eight people, to typically have four wheels, and to be constructed principally for the makes use of several motors Motor is a device that creates motion, an engine; it usually refers to either an electrical motor or an internal combustion engine. It may also refer to: to start the car and drive the car's various pumps – but the power plant that propels the car is called an engine. The term motor was originally used to distinguish the new internal combustion engine The internal combustion engine is an engine in which the combustion of a fuel occurs with an oxidizer (usually air) in a combustion chamber. In an internal combustion engine the expansion of the high temperature and pressure gases, which are produced by the combustion, directly applies force to a movable component of the engine, such as the-powered vehicles from earlier vehicles powered by a steam engine A steam engine is a heat engine that performs mechanical work using steam as its working fluid, such as the steam roller A steamroller is a form of road roller – a type of heavy construction machinery used for levelling surfaces, such as roads or airfields – that is powered by a steam engine. The levelling/flattening action is achieved through a combination of the size and weight of the vehicle and the rolls: the smooth wheels and the large cylinder or drum and motor roller A road roller is a compactor type engineering vehicle used to compact soil, gravel, concrete, or asphalt in the construction of roads and foundations; but can be used to refer to any engine that creates motion.
Historic military A military is an organization authorized by its country to use force, usually including use of weapons, in defending its country by combating actual or perceived threats. As an adjective the term "military" is also used to refer to any property or aspect of a military. Militaries often function as societies within societies, by having siege engines A siege engine is a device that is designed to break or circumvent city walls and other fortifications in siege warfare. Some have been operated close to the fortifications, while others have been used to attack from a distance. From antiquity, siege engines were constructed largely of wood and tended to use mechanical advantage to fling stones included large catapults A catapult is a device used to throw or hurl a projectile a great distance without the aid of explosive devices—particularly various types of ancient and medieval siege engines. Although the catapult has been used since ancient times, it has proven to be one of the most effective mechanisms during warfare, trebuchets A trebuchet or trebucket is a siege engine that was employed in the Middle Ages either to smash masonry walls or to throw projectiles over them. It is sometimes called a "counterweight trebuchet" or "counterpoise trebuchet" in order to distinguish it from an earlier weapon that has come to be called the "traction trebuchet&, and battering rams A battering ram is a siege engine originating in ancient times to break open fortification walls or doors.
The Birmingham News - al.com (blog)
Law enforcement officer's eyes light up when they see the tube frame chassis and Big Block Chevy engine on the street. "They want to see if I have insurance ...
