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Theoretical

Pendulum Pen"du*lum, n.; pl. Pendulums. [NL., fr. L. pendulus hanging, swinging. See Pendulous.] A body so suspended from a fixed point as to swing freely to and fro by the alternate action of gravity and momentum. It is used to regulate the movements of clockwork and other machinery. Note: The time of oscillation of a pendulum is independent of the arc of vibration, provided this arc be small. Ballistic pendulum. See under Ballistic. Compensation pendulum, a clock pendulum in which the effect of changes of temperature of the length of the rod is so counteracted, usually by the opposite expansion of differene metals, that the distance of the center of oscillation from the center of suspension remains invariable; as, the mercurial compensation pendulum, in which the expansion of the rod is compensated by the opposite expansion of mercury in a jar constituting the bob; the gridiron pendulum, in which compensation is effected by the opposite expansion of sets of rodsof different metals. Compound pendulum, an ordinary pendulum; -- so called, as being made up of different parts, and contrasted with simple pendulum. Conical or Revolving, pendulum, a weight connected by a rod with a fixed point; and revolving in a horizontal cyrcle about the vertical from that point. Pendulum bob, the weight at the lower end of a pendulum. Pendulum level, a plumb level. See under Level. Pendulum wheel, the balance of a watch. Simple or Theoretical, pendulum, an imaginary pendulum having no dimensions except length, and no weight except at the center of oscillation; in other words, a material point suspended by an ideal line.

Pendulum Pen"du*lum, n.; pl. Pendulums. [NL., fr. L. pendulus hanging, swinging. See Pendulous.] A body so suspended from a fixed point as to swing freely to and fro by the alternate action of gravity and momentum. It is used to regulate the movements of clockwork and other machinery. Note: The time of oscillation of a pendulum is independent of the arc of vibration, provided this arc be small. Ballistic pendulum. See under Ballistic. Compensation pendulum, a clock pendulum in which the effect of changes of temperature of the length of the rod is so counteracted, usually by the opposite expansion of differene metals, that the distance of the center of oscillation from the center of suspension remains invariable; as, the mercurial compensation pendulum, in which the expansion of the rod is compensated by the opposite expansion of mercury in a jar constituting the bob; the gridiron pendulum, in which compensation is effected by the opposite expansion of sets of rodsof different metals. Compound pendulum, an ordinary pendulum; -- so called, as being made up of different parts, and contrasted with simple pendulum. Conical or Revolving, pendulum, a weight connected by a rod with a fixed point; and revolving in a horizontal cyrcle about the vertical from that point. Pendulum bob, the weight at the lower end of a pendulum. Pendulum level, a plumb level. See under Level. Pendulum wheel, the balance of a watch. Simple or Theoretical, pendulum, an imaginary pendulum having no dimensions except length, and no weight except at the center of oscillation; in other words, a material point suspended by an ideal line.

- opposed to theory. A "cl****ical example" of the distinction between "theoretical" and "practical" uses the discipline of medicine: medical theory involves...

- Theoretical physics is a branch of physics that employs mathematical models and abstractions of physical objects and systems to rationalize, explain and...

- A theoretical definition defines a term in an academic discipline, functioning as a proposal to see a phenomenon in a certain way. A theoretical definition...

- In philosophy and particularly political philosophy, theoreticism is the preference for theory over practice (or, more broadly, abstract knowledge over...

- research often involves a substantial amount of work in the realms of theoretical and observational physics. Some areas of study for astrophysicists include...

- Theoretical chemistry is the branch of chemistry which develops theoretical generalizations that are part of the theoretical ****nal of modern chemistry:...

- Mathematical and theoretical biology is a branch of biology which employs theoretical analysis, mathematical models and abstractions of the living organisms...

- Advances in Theoretical and Mathematical Physics (ATMP) is a peer-reviewed, mathematics journal, published by International Press. Established in 1997...

- Theoretical planetology, also known as theoretical planetary science is a branch of planetary sciences that developed in the 20th century. Theoretical...

- A theoretical plate in many separation processes is a hypothetical zone or stage in which two phases, such as the liquid and vapor phases of a substance...

- Theoretical physics is a branch of physics that employs mathematical models and abstractions of physical objects and systems to rationalize, explain and...

- A theoretical definition defines a term in an academic discipline, functioning as a proposal to see a phenomenon in a certain way. A theoretical definition...

- In philosophy and particularly political philosophy, theoreticism is the preference for theory over practice (or, more broadly, abstract knowledge over...

- research often involves a substantial amount of work in the realms of theoretical and observational physics. Some areas of study for astrophysicists include...

- Theoretical chemistry is the branch of chemistry which develops theoretical generalizations that are part of the theoretical ****nal of modern chemistry:...

- Mathematical and theoretical biology is a branch of biology which employs theoretical analysis, mathematical models and abstractions of the living organisms...

- Advances in Theoretical and Mathematical Physics (ATMP) is a peer-reviewed, mathematics journal, published by International Press. Established in 1997...

- Theoretical planetology, also known as theoretical planetary science is a branch of planetary sciences that developed in the 20th century. Theoretical...

- A theoretical plate in many separation processes is a hypothetical zone or stage in which two phases, such as the liquid and vapor phases of a substance...

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