Research topic:half-life

Click to see an enlarged picture
half-life. Wikimedia Commons (Public Domain)

Pictures from Google Image Search

Click to see an enlarged picture
Click to see an enlarged picture
Click to see an enlarged picture
Click to see an enlarged picture
Find more facts and information on our topic page about half-life

half-life

A Dictionary of Earth Sciences | 1999 | | © A Dictionary of Earth Sciences 1999, originally published by Oxford University Press 1999. (Hide copyright information) Copyright

half-life See DECAY CONSTANT; and RADIOMETRIC DATING.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

AILSA ALLABY and MICHAEL ALLABY. "half-life." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 7 Dec. 2009 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "half-life." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (December 7, 2009). http://www.encyclopedia.com/doc/1O13-halflife.html

AILSA ALLABY and MICHAEL ALLABY. "half-life." A Dictionary of Earth Sciences. 1999. Retrieved December 07, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-halflife.html

Learn more about citation styles

Related newspaper, magazine, and trade journal articles from HighBeam Research

(Including press releases, facts, information, and biographies)

Pinole rolls to win over Berkeley
Newspaper article from: Oakland Tribune; 1/13/2007; ; 700+ words ; ...of her 14 points in the first half. Junior guard Jazmine Perkins...it." Berkeley had a little life at the end of the third quarter...assisted on Dina Wahbe's first-half goal. Molly Hendriksen fed Gabbi Duhl for a second-half score to make it 2-0, and...
A LOOK AT . . . Standards of Learning; Voices From the Front
Newspaper article from: The Washington Post; 1/17/1999; 700+ words ; ...retained--they need to be able to connect concepts to their own lives. That means building models, creating experiments, going...sixth-grade teacher, care about a test that is two and one-half years away for my students? The eighth- grade test measures...
An Illness No One Understands: Tourette's Syndrome.
Newspaper article from: The Washington Post; 1/19/1999; ; 700+ words ; ...like barking or screaming obscenities in public, that it is a life sentence, that victims cannot live normal lives. In fact, uncontrollable cursing or uttering obscenities-- coprolalia is the medical term--occurs only in about half of the people with the condition, and people with Tourette...
Scientists Find Way to Predict Huge Solar Magnetic Storms; Warning Would Help Protect Communications, Power Networks
Newspaper article from: The Washington Post; 3/10/1999; ; 700+ words ; ...advance in understanding the workings of the star that sustains life on Earth. Several times a day, in all directions, the sun...they can provide an accurate forecast of the impact only a half hour to an hour in advance of the storm's arrival at Earth...
Breathing Room, Indoors And Out; Gaithersburg Complex Sits on Nearly 40 Acres
Newspaper article from: The Washington Post; 1/13/2007; ; 700+ words ; ...where she moved in December 2004. She lives there with her husband and two dogs...and Metro to her job in Twinbrook, a half-hour trip. The bus is very convenient...officers who patrol. "They know who lives here," he said.
Channel Surfing, Saltwater, Hair Tips, Cat Tricks and More
Newspaper article from: The Washington Post; 3/10/1999; 700+ words ; ...downy fetal hair that is called lanugo and is what you started life with or like the extremely fine, transparent vellus hair that...follicles on the average head can produce hair at the rate of one-half inch a month for three years before subsiding. (Your mileage...
LEARNING & EDUCATION; Seniors stepping up to one last challenge; Exam caps Walden years
Newspaper article from: The Milwaukee Journal Sentinel; 1/14/2007; ; 700+ words ; ...presentation that proves they are ready for post-secondary life. Principal Bob Holzem thinks Walden's signature Rite of Passage...ROPE process. He meets with them every day during the first half of the year. In addition to making sure the academic work is...
JIM STINGL; IN MY OPINION; If mystery bike spoke, what would it say?
Newspaper article from: The Milwaukee Journal Sentinel; 1/14/2007; ; 700+ words ; ...there's gotta be a story behind this," said Corroo, who lives on the south side of Milwaukee but often drives through downtown...our city when you can park your bike somewhere and come back half a year later and find it relatively unmolested, although I...
Thousands gather to support Dellums
Newspaper article from: Oakland Tribune; 1/14/2007; ; 700+ words ; ...Ron Dellums' inauguration. While the turnout was less than half of what organizers had hoped for -- and not nearly enough to...safety his No. 1 priority. But the violence that claimed the lives of 148 people in 2006 showed no immediate sign of easing. Four...
Bay Area mass transit gets $25 million for security
Newspaper article from: Oakland Tribune; 1/14/2007; ; 700+ words ; ...vulnerability of people and structures, and the potential toll on human life and economic vitality, said homeland security spokeswoman Joanna...use the money to reduce their risk of a terror attack. Nearly half the nationwide grant money, $201 million, would be used to...

Related entries from encyclopedias, dictionaries, and thesauruses

Zapotec
Book article from: The Columbia Encyclopedia, Sixth Edition ...southern valleys in the mountains of Oaxaca and those of the southern half of the Isthmus of Tehuantepec; together they number some 350,000. The social fabric of Zapotec life—customs, dress, songs, and literature—though...
Zhang Xianliang
Book article from: The Columbia Encyclopedia, Sixth Edition ...he began to write fiction that depicts life along China's western frontier and often...China's labor camps. His controversial Half of Man Is Woman (1985, tr. 1986) is an autobiographical novel about a man's life in the camps and his sexual difficulties...
George Washington
Book article from: The Columbia Encyclopedia, Sixth Edition ...American Revolution , called the Father of His Country. Early Life He was born on Feb. 22, 1732 (Feb. 11, 1731, O.S...office, surveyor of newly created Culpeper co., and through his half-brother Lawrence Washington he became interested in the Ohio...
Western Australia
Book article from: The Columbia Encyclopedia, Sixth Edition ...settled; the rest is arid and scarcely habitable. Half the population lives in the Perth metropolitan area. Western Australia...primarily to the southwest and around Perth. About one half of the cultivated land is in wheat. Sheep graze in...
wetlands
Book article from: The Columbia Encyclopedia, Sixth Edition ...systems, which may be further subdivided by soil type and plant life into bogs , swamps , and marshes. Because wetlands have poor...growth and farming before their value was recognized. More than half of U.S. wetlands in the lower 48 states have been lost since...

Related research topics

For students and teachers!

Encyclopedia.com provides students and teachers facts, information, and biographies from verified, citable sources, including:

Encyclopedia.com provides students and teachers facts, information, and biographies from verified, citable sources, including: