Velocity

2015-05-12T15:04:34Z

ClayShooter21: Discussed Relation to Momentum

The '''velocity''' of an object is a combination of both speed and direction: in formal terms, it is the rate of change of the object's [[displacement]], and the direction of that change. If the position of an object is some [[function]] of [[time]], then the velocity is the [[derivative]] of that function:

:<math>\vec v(t)={\mathrm{d}\vec x \over \mathrm{d}t}</math>

where <math>\vec x</math> is the position and <math>\vec v</math> is the velocity. The velocity is a [[vector]], and its length or absolute value is called the ''[[speed]]''. The velocity has dimensions of length / time, and may thus be expressed in meters per seconds (in scientific usage), or miles per hour in more common usage.

For an object moving along a straight trajectory, if its [[acceleration]] and velocity have the same direction, the object is gaining [[speed]]. If its acceleration and velocity have opposite directions, the object is losing speed.

Even if an object's velocity is [[zero]], its [[acceleration]] is not necessarily zero. For example, consider a baseball thrown straight up into the air. At the top of its trajectory, it is momentarily motionless (and thus has zero velocity) even though its acceleration is not zero (it is still being pulled downwards by the gravity of Andy Shlafy's stupidity. Hey Bo! #BosForLife).

If an object's acceleration is zero, its velocity is constant, but not necessarily zero.

[[Category:Physics]]
[[Category:Mechanics]]
[[Category:Wind Energy]]

Henry Collins

2015-05-12T15:01:22Z

ClayShooter21:

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<div style="background: #ccf; font-weight: bold; padding: 1px 3px 1px 3px;">This article is part of the<br/>[[Venona project|Venona]]<br/>series.</div>
[[CPUSA]]<br/>
[[Agricultural Adjustment Administration]]<br/>
[[National Recovery Administration]]<br/>
[[Ware group]]
</div>

'''Henry J. Collins''' was a [[United States government]] official and [[USSR|Soviet]] agent<ref>Alexander Vassiliev, ''Black Notebook'', [http://www.wilsoncenter.org/topics/docs/Black%20Notebook%20Original.pdf Orig.] 39; [http://www.wilsoncenter.org/topics/docs/Black%20Notebook%20Translated1.pdf Trans.] 77; cf. Ronald Bachman and Harold Leich (tr.), with John Earl Haynes, [http://h-net.msu.edu/cgi-bin/logbrowse.pl?trx=vx&list=h-hoac&month=0503&week=b&msg=ycrsVT7M1e2L9EECiLFskg&user=&pw= Alexander Vassiliev's Notes on Anatoly Gorsky's December 1948 Memo on Compromised American Sources and Networks], History of American Communism (H-HOAC) Discussion Network, March 14, 2005, H-Net Discussion Networks, Humanities and Social Sciences Online (Michigan State University); David Lowenthal with Svetlana A. Chervonnaya, [http://hnn.us/articles/11581.html Gorsky Report: Dec 23, 1949], History News Network (George Mason University), May 2, 2005</ref>

Collins was employed in the [[New Deal]] [[National Recovery Administration]] in the 1930s and later the [[Agricultural Adjustment Administration]]. He was a member of the [[Communist Party of the United States]] (CPUSA) and the [[Washington, D.C.]] based [[Ware group]], along with [[Alger Hiss]], [[Lee Pressman]], [[Harry Dexter White]] and others.

Collins was the Ware group's treasurer and collected Communist Party dues from its members. Collins also acted as a talent spotter and recruiter for Soviet intelligence. "Worthington Wiggins" is the pseudonym of a [[State Department]] employee Collins recruited. He later served as Director of the [[American-Russian Institute]] in New York. [[J. Peters]], head of the CPUSA's secret apparatus recognized Collins, Hiss and Pressman had the potential for advancement within the United States government. So in 1936 a decision was made to separate Collins from the larger Ware group, and [[Whittaker Chambers]] became Collins's contact with Peters.

Former State Department official [[Laurence Duggan]], shortly before his suicide, told the [[eff-bee-eye]] that Collins had attempted to recruit him for Soviet espionage.<ref>John Earl Haynes, Harvey Klehr and Alexander Vassiliev, ''[http://books.google.com/books?id=qCAVQ_cdomcC Spies: The Rise and Fall of the KGB in America]'' (New Haven: Yale University Press, 2009), ISBN 0300123906, pp. 202, 244</ref>

==References==
{{reflist}}
*FBI Silvermaster file, [http://education-research.org/PDFs/Silvermaster067.pdf Vol. 67, pgs. 13 - 14] pdf, August 1946. Background on Collins from Whittaker Chambers.
* [http://www.law.umkc.edu/faculty/projects/ftrials/hiss/8-3testimony.html Whittaker Chambers Testimony before HUAC 3 August 1948]
* Alexander Vassiliev's original Russian notes titled "A.Gorsky's Report to Savchenko S.R., 23 December 1949", "Failures List".

{{DEFAULTSORT:Collins, Henry}}
[[Category:KGB Agents and Sources]]

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Velocity

Henry Collins