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chemistry
Chemistry is the study of the constitution of matter and its interactions; it has numerous applications, including biochemistry, electrochemistry and nuclear chemistry.
physics: mechanics
Mechanics is the study of force and motion. A mechanism is defined by two forces: the driving force (effort) and the resistant force (load).
physics: electricity and magnetism
Electromagnetism is the study of the relationship between electricity and magnetism. Its many applications include motors, loudspeakers, measurement instruments and computers.
physics: optics
Optics: the scientific study of light and vision; its various applications include lenses, microscopes, lasers and fiber optics.
measuring devices
Instruments for determining various quantities such as temperature, mass, height, length, voltage and mechanical force.
