Reaction

Chemical

Reactions involve interaction of atoms or molecules to form new molecules or atoms by making or breaking electronic bonds.

Mechanics

A reaction is a force exerted by a support on an object: sometimes called support reaction. Using this definition, a reaction is an external force.

Nuclear

The process of combining or separating material at an atomic or sub-atomic level. Reactions absorb or release energy. Nuclear reactions involve interaction in the nucleus to form new elements.

See also: Chemical Reaction, Force.

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Subjects: Mechanical Engineering Physics