fifth force


Also found in: Dictionary, Wikipedia.

fifth force,

postulated fifth basic forceforce,
commonly, a "push" or "pull," more properly defined in physics as a quantity that changes the motion, size, or shape of a body. Force is a vector quantity, having both magnitude and direction.
..... Click the link for more information.
 of nature (the four known forces of nature are gravity, electromagnetism, and the strong and weak interactions). Proposed in 1986 to account for gravitational discrepancies observed during some experiments, it was said to result in a repulsive effect about 1,000 times less powerful than gravity, and its strength was said to fall off quickly with distance, having a range of about 700 ft (200 m). The results of some initial experiments supported the possibility that the fifth force might exist, but later investigations, including a large-scale, highly accurate oceanic experiment, provided no evidence of such a force.
Mentioned in ?
References in periodicals archive ?
Now, researchers at Imperial College London and the University of Nottingham have tested the possibility that this fifth force is acting on single atoms, and found no evidence for it in their most recent experiment.
But a fifth force that has the ability to interact with both normal and dark matter could strengthen or diminish dark matter's gravitational pull.
Until today, nobody has conducted such a fifth force test with an exotic object like a neutron star.
The researchers put emphasis on further experimentation in the field with Feng saying that the potential fifth force could be linked to the electromagnetic and strong and weak nuclear forces as "manifestations of one grander, more fundamental force."
It doesn't end with potential personal wealth either; for once John and his associates begin working with the Fifth Force, they determine that any inventions from the force will of necessity look like a flying saucer - raising all kinds of questions about alien existence, space, and alien technology that spark a renewed quest for the truth in outer space.
Social justice counseling: Toward the development of a "fifth force" among counseling paradigms.
Northumbria Police is the fifth force in the country to try out the scheme, and Assistant Chief Constable Jim Campbell believes Community Res-olutiowill help speed up the justice system.
An analysis of an atomic mirror symmetry violation experiment at CERN's non-collider facilities at LHC could prove or disprove the possibility of a fifth force.
A fifth force in Wales could have a significant impact on the result of this week's National Assembly elections.
Conducted in conjunction with the Army's fifth Force Projection Symposium, the Fort Story exercise included the Navy sealift ship USNS Denebola and virtually every type of watercraft in the Army's fleet.
This combination is focused on increasing competition by the creation of a fifth force in UK banking, something which is good news for consumers.