Welcome to Citizendium: Difference between revisions
imported>Denis Cavanagh (Well done article(s) of the week!) |
imported>Todd Coles (linked titles) |
||
| Line 87: | Line 87: | ||
=== Draft of the Week <font size=1>[ [[CZ:Article of the Week|about]] ]</font> === | === Draft of the Week <font size=1>[ [[CZ:Article of the Week|about]] ]</font> === | ||
[[Image:Tissot watch.jpg|right|thumb|150px|{{#ifexist:Template:Tissot watch.jpg/credit|{{Tissot watch.jpg/credit}}<br/>|}}A wristwatch made by Swiss watchmaker [[Tissot]].]] | [[Image:Tissot watch.jpg|right|thumb|150px|{{#ifexist:Template:Tissot watch.jpg/credit|{{Tissot watch.jpg/credit}}<br/>|}}A wristwatch made by Swiss watchmaker [[Tissot]].]] | ||
A '''wristwatch''' is a timepiece designed to be worn around the wrist, held on by a [[band]]. Modern wristwatches are often referred to simply as "[[watch]]es", and are mostly electronic, despite having either an analog or digital appearance. There are wristwatches that are still entirely mechanical but because of the higher manufacturing and maintenance cost, these are becoming more rare and are considered "luxury items" or "antiques". | A '''[[wristwatch]]''' is a timepiece designed to be worn around the wrist, held on by a [[band]]. Modern wristwatches are often referred to simply as "[[watch]]es", and are mostly electronic, despite having either an analog or digital appearance. There are wristwatches that are still entirely mechanical but because of the higher manufacturing and maintenance cost, these are becoming more rare and are considered "luxury items" or "antiques". | ||
<font size=1>[[Wristwatch|['''more...''']]]</font> | <font size=1>[[Wristwatch|['''more...''']]]</font> | ||
=== New Draft of the Week <font size=1>[ [[CZ:New Draft of the Week|about]] ]</font> === | === New Draft of the Week <font size=1>[ [[CZ:New Draft of the Week|about]] ]</font> === | ||
[[Image:Rutherford.jpg| | [[Image:Rutherford.jpg|left|thumb|150px|{{#ifexist:Template:Rutherford.jpg/credit|{{Rutherford.jpg/credit}}<br/>|}}Ernest Rutherford.]] | ||
'''Ernest Rutherford''' (born August 30, 1871, Nelson, [[New Zealand]] and died October 19, 1937, Cambridge, [[England]]) was the first person to split an [[atom]] and as the world’s first successful “alchemist,” changed [[nitrogen]] into [[oxygen]]. He postulated the existence of the '''[[proton]]''' and the '''[[neutron]]''', naming them both, and provided the first nuclear model of the atom. He discerned that radioactivity is the product of subatomic change and thereby ended the chapter on Aristotelian physics which held that all matter is immutable and unchanging. He discovered and named '''alpha''' and '''beta''' particles emitted by radioactive materials, discovered '''radon''' (a radioactive gas), '''tritium''' (H<sup>3</sup>) and He<sup>3</sup>. Through his work and calculations of radioactive decay he coined the phrase ''half-life'' and provided definitive evidence for the extreme age of the Earth. | '''[[Ernest Rutherford]]''' (born August 30, 1871, Nelson, [[New Zealand]] and died October 19, 1937, Cambridge, [[England]]) was the first person to split an [[atom]] and as the world’s first successful “alchemist,” changed [[nitrogen]] into [[oxygen]]. He postulated the existence of the '''[[proton]]''' and the '''[[neutron]]''', naming them both, and provided the first nuclear model of the atom. He discerned that radioactivity is the product of subatomic change and thereby ended the chapter on Aristotelian physics which held that all matter is immutable and unchanging. He discovered and named '''alpha''' and '''beta''' particles emitted by radioactive materials, discovered '''radon''' (a radioactive gas), '''tritium''' (H<sup>3</sup>) and He<sup>3</sup>. Through his work and calculations of radioactive decay he coined the phrase ''half-life'' and provided definitive evidence for the extreme age of the Earth. | ||
<font size=1>[[Ernest Rutherford|['''more...''']]]</font> | <font size=1>[[Ernest Rutherford|['''more...''']]]</font> | ||
|} | |} | ||
Revision as of 08:59, 28 January 2008
 |
| |||||||||||||
Welcome!We are an encyclopedia project, and more. We are a different sort of Web 2.0 wiki:
We have added [[:Category:CZ Live|over Template:Articles number articles]] (and many subpages), and over five million words. Announcement: Eduzendium encourages university instructors to assign CZ topics to students! Read our first year progress report. (Note how we've grown since!) Contribute to Citizendium!
Learn about us
Initiatives
Support us
|
Some of our finest [ about ]
Draft of the Week [ about ] A wristwatch is a timepiece designed to be worn around the wrist, held on by a band. Modern wristwatches are often referred to simply as "watches", and are mostly electronic, despite having either an analog or digital appearance. There are wristwatches that are still entirely mechanical but because of the higher manufacturing and maintenance cost, these are becoming more rare and are considered "luxury items" or "antiques". [more...] New Draft of the Week [ about ]Ernest Rutherford (born August 30, 1871, Nelson, New Zealand and died October 19, 1937, Cambridge, England) was the first person to split an atom and as the world’s first successful “alchemist,” changed nitrogen into oxygen. He postulated the existence of the proton and the neutron, naming them both, and provided the first nuclear model of the atom. He discerned that radioactivity is the product of subatomic change and thereby ended the chapter on Aristotelian physics which held that all matter is immutable and unchanging. He discovered and named alpha and beta particles emitted by radioactive materials, discovered radon (a radioactive gas), tritium (H3) and He3. Through his work and calculations of radioactive decay he coined the phrase half-life and provided definitive evidence for the extreme age of the Earth. [more...] | |||||||||||||
