centre of mass

Definitions

  • WordNet 3.6
    • n centre of mass point representing the mean position of the matter in a body
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Chambers's Twentieth Century Dictionary
    • Centre of mass the centre of a set of parallel forces acting on all the particles of a body, each force being proportional to the mass of the particle on which it acts
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Etymology

Chambers's Twentieth Century Dictionary
Fr.,—L. centrum—Gr. kentron, a sharp point.

Usage

In literature:

In Roxbury, Mass., there still stands at the corner of Centre and Washington Streets the famous Roxbury Parting Stone.
"Customs and Fashions in Old New England" by Alice Morse Earle
About 3 p.m. the enemy began to mass in the woods about the Menin road, near the centre of our line.
"1914" by John French, Viscount of Ypres
Their long branches will be a mass of flowers with fringy petals and a yellow centre.
"Amateur Gardencraft" by Eben E. Rexford
From the centre of these lakes rise islets consisting of masses of muriate and carbonate of soda.
"Celebrated Travels and Travellers" by Jules Verne
Near the centre of the province the mountains of Sahand rise in an accumulated mass to the height of 12,000 ft. above the sea.
"Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 1" by Various
The larva, placed in a paper boat in the centre of the mass of honey, behaves as in the earlier experiments.
"The Glow-Worm and Other Beetles" by Jean Henri Fabre
Almost instantly I was the centre of a snarling mass of lions; I saw nothing; my whip rose and fell mechanically.
"The Maids of Paradise" by Robert W. (Robert William) Chambers
This tower is two hundred and twenty-five feet high, and forms an admirable centre to the masses of buildings clustered around it.
"England, Picturesque and Descriptive" by Joel Cook
In the centre of a spiral nebula is seen a mass both more luminous and more resolvable than the rest.
"Essays: Scientific, Political, & Speculative, Vol. I" by Herbert Spencer
The centre door is only used in the celebration of the holy mass.
"Visits To Monasteries in the Levant" by Robert Curzon
Towards the centre of the mass numerous small openings form on the surface, from which blood and matter escape.
"Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 3" by Various
In the centre of the yard are masses of hollyhocks, marigolds, nasturtiums, and stocks.
"The Unveiling of Lhasa" by Edmund Candler
The system of giving variety to the facade of the secular buildings by massing openings near the centre, has been already referred to.
"Architecture" by Thomas Roger Smith
At a free surface within or without, ice melts with more ease than in the centre of a compact mass.
"The Glaciers of the Alps" by John Tyndall
The chief Kaena and his canoe were in the centre of this terrible mass of wreckage, and he and many of his people lost their lives.
"Legends of Gods and Ghosts (Hawaiian Mythology)" by W. D. (William Drake) Westervelt
The centre of the church was a seething mass of greenery.
"The Fortunate Isles" by Mary Stuart Boyd
Comes up to a blaze in the centre; indicating a round mass of pretty equable density.
"Astronomical Curiosities" by J. Ellard Gore
The three other peaks are broken crags of basalt, leaning as for support against the mighty mass at the centre.
"The Columbia River" by William Denison Lyman
In the centre of a spiral nebula is seen a mass both more luminous and more resolvable than the rest.
"Illustrations of Universal Progress" by Herbert Spencer
The castle itself consists of a quadrangular mass of great dignity and splendour, with an open court in the centre.
"Nooks and Corners of English Life, Past and Present" by John Timbs
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In news:

During a Mass and dedication ceremony Sunday morning, Diocese of Rockville Centre Bishop William Murphy inaugurated the Sacred Hearts of Jesus and Mary Church in Southampton into a minor basilica .
Defendant Anders Behring Breivik, centre, in court at the start of the 5th day of his mass killing trial in Oslo, Norway, April 20, 2012.
Mass of Christian Burial will be held at 11 am Thursday, June 7, 2012 at St Paul's Catholic Church in Sauk Centre with Rev.
Mass of Christian Burial will be held at 11 am Thursday, March 29 at Our Lady of the Angels Catholic Church in Sauk Centre with Rev.
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In science:

The centre-of-mass frame of this Hubble sphere can be regarded as a preferred frame .
General Relativity Requires Absolute Space and Time
Similarly for other initial states: if the initial superposition had the two positions separating from each other at say x cm sec−1 , then after a second, the probabilities would be as if there is an even chance of the (centre of mass of the) particle being in two positions x + 10−4 cm apart.
On the Persistence of Homogeneous Matter
Here M1 is the mass of the accretor, M2 – the mass-losing star’s mass, r1 , r2 – the radius-vectors of the centres of components, r c – the radius-vector of the centre of mass of the system.
3D Gasdynamic Modelling of the Changes in the Flow Structure During Transition From Quiescent to Active State in Symbiotic Stars
Let a collisionless, self-gravitating fluid be referred to an inertial frame, (Ox1x2x3), where (without loss of generality) the origin coincides with the centre of mass.
R3 fluids
With regard to an infinitesimal volume element, d3S , at the time, t, the first term on the right-hand side of Eqs. (61) and (62) is related to the velocity components of the centre of mass, while the second term is related to velocity components with respect to the centre of mass.
R3 fluids
Having the centre of mass of the system been chosen as origin of the (inertial) reference frame, mean (over the whole volume) velocity components along coordinate axes are necessarily null: vr = 0; (e.g., LL66, Chap.
R3 fluids
Let the coordinate axis, x3 , containing the axis, a3 , be chosen as rotation axis, without loss of generality, as the reference frame may arbitrarily be oriented, provided the origin coincides with the centre of mass.
R3 fluids
The mean radial velocity component, vw , is related to the motion of the centre of mass along the equatorial plane.
R3 fluids
We fit for the following system parameters: four orbital parameters: T tr (epoch of transit), V0 (centre-of-mass velocity), K (velocity semi-amplitude), i (orbital inclination); mass and radius of the star M s , R s ; mass and radius of the planet M p , R p ; and projected spin-orbit angle λ.
The spin-orbit angle of the transiting hot jupiter CoRoT-1b
The reaction energy is defined by the photon- proton centre of mass energy W , with W 2 ≃ Q2/x, where x is the Bjorken scaling variable.
Diffractive Electroproduction of rho and phi Mesons at HERA
The data sets are summarised in Table 1, where √s is the ep centre of mass energy and the lepton beam type is speci fied.
Diffractive Electroproduction of rho and phi Mesons at HERA
This conservation of the ’centre of mass’ is reflected in the envelope of the frequency comb in Figure 1a, showing an asymmetric comb around the pump laser, with higher power per comb mode but less lines on the low frequency side with respect to the pump laser.
Octave Spanning Frequency Comb on a Chip
Assmann et al., Calibration of centre-of-mass energies at LEP2 for a precise measurement of the W boson mass, Eur.
Results from a Prototype Chicane-Based Energy Spectrometer for a Linear Collider
Neumann directions and that the centre of mass momentum in the transverse directions vanishes.
String Vertex Operators and Cosmic Strings
As there was on LEP2 data at large significant initial state radiation, several experiments required that the invariant mass of the final state leptons exceed 85% of the centre of mass beam energy.
Non-Standard Neutrino Interactions at Colliders
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