2.what is the difference between machine and mechanism?

The scientific definition of a machine is any device that transmits or modifies energy(i.e. input). In common usage, the meaning is restricted to devices having rigid moving parts that perform or assist in performing some work. Machines normally require some energy source ("input") and always accomplish some sort of work. Devices with no rigid moving parts are commonly considered tools, or simply devices, not machines.

A mechanism is some technical aspect of a larger process or mechanical device, a part or combination of parts designed to perform a particular function. Sometimes an entire machine may be referred to as mechanism. Some examples are the steering mechanism in a car, or the winding mechanism of a wristwatch, or the mechanism of action of a drug or medication. In chemistry, a reaction mechanism is the step by step sequence of elementary reactions by which overall chemical change occurs.Something resembling a machine in the arrangement and working of its parts. These also make a system or process work.
Machins Contain Mechanism. Mechanism is principle for Machins.
1. an apparatus consisting of interrelated parts with separate functions, used in the performance of some kind of work: a sewing machine.
2. a mechanical apparatus or contrivance; mechanism.
3. Mechanics. a. a device that transmits or modifies force or motion.
b. Also called simple machine. any of six or more elementary mechanisms, as the lever, wheel and axle, pulley, screw, wedge, and inclined plane.
c. Also called complex machine. a combination of simple machines.
4. Older Use. a. an automobile or airplane.
b. a typewriter.
5. a bicycle or motorcycle.
6. a vending machine: a cigarette machine.
7. any complex agency or operating system: the machine of government.
8. an organized group of persons that conducts or controls the activities of a political party or organization: He heads the Democratic machine in our city.
9. a person or thing that acts in a mechanical or automatic manner: Routine work had turned her into a machine.
10. any of various contrivances, esp. those formerly used in theater, for producing stage effects
11. some agency, personage, incident or other feature introduced for effect into a literary composition.
–verb (used with object) 12. to make, prepare, or finish with a machine or with machine tools.


1. an assembly of moving parts performing a complete functional motion, often being part of a large machine; linkage.
2. the agency or means by which an effect is produced or a purpose is accomplished.
3. machinery or mechanical appliances in general.
4. the structure or arrangement of parts of a machine or similar device, or of anything analogous.
5. the mechanical part of something; any mechanical device: the mechanism of a clock.
6. routine methods or procedures; mechanics: the mechanism of government.
7. mechanical execution, as in painting or music; technique.
8. the theory that everything in the universe is produced by matter in motion; materialism. Compare dynamism (def. 1), vitalism (def. 1).
9. Philosophy. a. the view that all natural processes are explicable in terms of Newtonian mechanics.
b. the view that all biological processes may be described in physicochemical terms.
10. Psychoanalysis. the habitual operation and interaction of psychological forces within an individual that assist in interpreting or dealing with the physical or psychological environment.
A machine is a combination of mechanisms that function together to produce a desired result, or product.

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