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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...

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

- Conjectured to have existed early in the universe. none Dark star A theoretical construct based on Newtonian gravitation, of a star with gravity so strong...

- Mathematical and theoretical biology or, Biomathematics, is a branch of biology which employs theoretical analysis, mathematical models and abstractions...

- Theoretical computer science (TCS) is a subset of general computer science that focuses on mathematical aspects of computer science such as the theory...

- The Theoretical Minimum: What You Need to Know to Start Doing Physics is a po****r science book by Leonard Susskind and George Hrabovsky. The book was...

- Theoretical linguistics is a term in linguistics which, like the related term general linguistics, can be understood in different ways. Both can be taken...

- 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...

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

- Conjectured to have existed early in the universe. none Dark star A theoretical construct based on Newtonian gravitation, of a star with gravity so strong...

- Mathematical and theoretical biology or, Biomathematics, is a branch of biology which employs theoretical analysis, mathematical models and abstractions...

- Theoretical computer science (TCS) is a subset of general computer science that focuses on mathematical aspects of computer science such as the theory...

- The Theoretical Minimum: What You Need to Know to Start Doing Physics is a po****r science book by Leonard Susskind and George Hrabovsky. The book was...

- Theoretical linguistics is a term in linguistics which, like the related term general linguistics, can be understood in different ways. Both can be taken...

- 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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