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center of mass
center of mass the point at which all the mass of a body may be considered to be concentrated in analyzing its motion. The center of mass of a sphere of uniform density coincides with the center of the sphere. The center of mass of a body need not be within the body itself; the center of mass of a ring or a hollow cylinder is located in the enclosed space, not in the object itself. Under the action of a constant force of gravity, a body suspended or balanced at its center of mass will be stable; there will be no net moment acting on it. Sometimes a problem may be analyzed from the point of view of the center of mass of an entire system of objects, such as several colliding elementary particles or a multiple-star system. For example, the complex motions of the earth and moon about the sun become somewhat simpler when viewed from the common center of mass of the earth-moon system, located about 1,000 mi (1,600 km) below the earth's surface. It is this point that is moving in an elliptical orbit around the sun rather than the center of mass of the earth alone.
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Price Disparities Common In Health Care System
Transcript from: NPR All Things Considered; 11/13/2009; ; 700+ words
; ...Choice Health, Inc.): At example, an MRI of the shoulder, go to Davis Highway and get the MRI at this Pensacola Open MRI Center for $400 to $450. Or you could take a right on Bayou Boulevard and go to Sacred Heart and have it done for twice that 800...
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MILLENNIUM CHALLENGE CORPORATION MILLENNIUM CHALLENGE CORPORATION HOLDS A PUBLIC OUTREACH EVENT ON PUBLIC SECTOR CLIMATE CHANGE
Transcript from: Washington Transcript Service; 11/12/2009; 700+ words
; ...FUND CHRISTIE ULMAN, OFFICE OF ENERGY AND ENVIRONMENT, UNITED STATES TREASURY MICHAEL WIRONEN WILLIAM LOGAN, INTERNATIONAL CENTER FOR INTEGRATED WATER RESOURCES MANAGEMENT BRIAN LAVERTY, CLIMATE CHANGE GROUP, PARSONS BRINCKERHOFF MICHAEL FLOOD, TRANSPORTATION...
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For November 13, 2009, CBS
Transcript from: CBS The Early Show; 11/13/2009; ; 700+ words
; ...epidemic. We first reported Monday that the number of victims was much higher than the official numbers that were reported by the Centers for Disease Control initially. The CDC is now saying that twenty-two million Americans have been infected with H1N1, nearly...
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For November 12, 2009, CBS
Transcript from: CBS Morning News; 11/12/2009; ; 700+ words
; ...before last week`s shooting rampage at Fort Hood, doctors, who worked with Major Nidal Malik Hasan at Walter Reed Medical Center, questioned his strange behavior. They say the Army psychiatrist at times was belligerent, defensive, and argumentative...
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SENATE RESOLUTION SUPPORTS VETERANS HISTORIES
Transcript from: Capitol Hill Press Releases; 11/11/2009; 617 words
; ...children, grandchildren and great grandchildren have thatsame opportunity.`` Congress has charged the American Folklife Center atthe Library of Congress to undertake the Veterans History Project. A growingnumber of oral histories are being housed at...
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WORD FROM THE WHITE HOUSE: BUSINESS ROUNDTABLE HEWITT REPORT "HEALTH CARE REFORM: CREATING A SUSTAINABLE MARKET"
Transcript from: Regulatory Intelligence Data; 11/12/2009; ; 516 words
; ...sectorspending if adopted and implemented appropriately." o These policies include: value-based purchasing, a new CMSInnovation Center, "accountable care organizations" and reducing preventablehospital re-admissions. The BRT report also notes that with...
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Fort Hood Suspect Charged With 13 Counts Of Murder
Transcript from: NPR All Things Considered; 11/12/2009; ; 700+ words
; ...psychiatrist assigned to Darnall Medical Center here at Fort Hood, has been charged with...that day at the Soldier Readiness Medical Center, that's where the shooting took place...that Major Hasan came to the Readiness Center for no other reason than to murder. And...
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What's Behind Lou Dobbs' Leaving CNN?
Transcript from: NPR All Things Considered; 11/12/2009; ; 700+ words
; ...journalism on cable television. FOX News has drawn big ratings with hosts who are right of center and in Glenn Beck's case, right of right of center. And MSNBC has had some success by veering to the left in prime time. CNN has, by comparison...
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Fed Moves To Block Some Overdraft Fees
Transcript from: NPR All Things Considered; 11/12/2009; ; 609 words
; ...will have to opt in. BLOCK: And what does that mean for the banks? KEITH: Well, overdraft fees have been a huge profit center for banks, in part because we're all using our debit cards so much more, especially for these small purchases like coffee...
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Fort Hood Reactions
Transcript from: NPR Tell Me More; 11/13/2009; ; 700+ words
; ...people is the discovery of a PowerPoint presentation he made to his colleagues, when he was posted at Walter Reed Army Medical Center in Washington, D.C. where he raised the connection between Islam and the stress of soldiers, service members being called...
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Uniontown
Book article from: The Columbia Encyclopedia, Sixth Edition
...034), seat of Fayette co., SW Pa., near the W.Va. line; settled c.1767, inc. as a city 1916. It is a farm trade center and an industrial city. Formerly noted for its production of coal and coke, the city now manufactures machinery, medical...
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United Service Organizations
Book article from: The Columbia Encyclopedia, Sixth Edition
...Association. USO was organized in 1941; its services, discontinued at the end of 1947, were resumed early in 1949 at the request of President Truman. With programs in over 120 centers worldwide, it is supported by voluntary contributions.
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Urganch
Book article from: The Columbia Encyclopedia, Sixth Edition
Urganch or Urgench , city (1989 pop. 126,380), capital of Khwarazm region, S Uzbekistan, on the Amu Darya River and the Shavat canal, in the Khiva oasis. It has cotton and food-processing industries. Urganch was a trade center of the Khiva khanate.
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Uruapan
Book article from: The Columbia Encyclopedia, Sixth Edition
...city with gardens and parks, it is in a semitropical, mountainous agricultural region. The city, founded in 1540, is the center of the manufacture of gourd lacquerware by the Tarascans. Local artisans also produce glassware, woodwork, and embroideries...
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Ürümqi
Book article from: The Columbia Encyclopedia, Sixth Edition
...mqi is an administrative and commercial center at the junction of several historical...it remains a market and transshipment center for China's trade with Central Asia...network via Lanzhou. The main industrial center of Xinjiang, Ürümqi...
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