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	<title>Мetroion &#187; SI</title>
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		<title>Основни величини и съответните единици</title>
		<link>http://metroion.com/base-quantity-units/</link>
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		<pubDate>Thu, 13 Sep 2012 11:28:05 +0000</pubDate>
		<dc:creator>MetroIon</dc:creator>
				<category><![CDATA[Величини и единици]]></category>
		<category><![CDATA[SI]]></category>
		<category><![CDATA[Активност (на радиоактивен източник)]]></category>
		<category><![CDATA[въздушна керма]]></category>
		<category><![CDATA[Еквивалентна доза]]></category>
		<category><![CDATA[Експозиция]]></category>
		<category><![CDATA[Керма]]></category>
		<category><![CDATA[метрична система]]></category>
		<category><![CDATA[мощност на въздушната керма]]></category>
		<category><![CDATA[мощност на експозицията]]></category>
		<category><![CDATA[Погълната доза]]></category>

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		<description><![CDATA[Идеята за Метричната система &#8211; система от единици, основаваща се на метъра и килограма &#8211; възниква по време на Френската революция, когато са изработени два платинови артефакта &#8211; референтни еталони за метъра и килограма и са оставени на съхранение във Френския национален архив в Париж през 1799 г. По-късно те са известни като „Архивен Метър<a href="http://metroion.com/base-quantity-units/">[...]</a>]]></description>
			<content:encoded><![CDATA[<p align="justify"><span style="color: #000000;">Идеята за Метричната система &#8211; система от единици, основаваща се на метъра и килограма &#8211; възниква по време на Френската революция, когато са изработени два платинови артефакта &#8211; референтни еталони за метъра и килограма и са оставени на съхранение във Френския национален архив <em>в </em>Париж през 1799 г. По-късно те са известни като „Архивен Метър &#8221; и „ Архивен Килограм&#8221;. Френската академия на науките е упълномощена от парламента да създаде нова система от единици за използване в целия свят. През 1946 г. страните, членки на Конвенцията на метъра приемат системата МКSА (метър, килограм, секунда, ампер). През 1954 г. МКSА е разширена като са включени келвин и кандела. От тогава системата приема името Международна система от единици, SI.<span id="more-830"></span></span></p>
<p align="justify"><span style="color: #000000;"> </span></p>
<p align="justify"><span style="color: #000000;">Системата SI е въведена през 1960 г. от 11 -тата Генерална конференция по мерки и теглилки, СGРМ: </span></p>
<p align="justify"><span style="color: #000000;">„Международната система единици, SI, е кохерентна система от единици, приета и препоръчвана от СGРМ&#8221;. </span></p>
<p align="justify"><span style="color: #000000;">Понастоящем системата SI включва седем основни единици, които заедно с производните единици съставят една кохерентна система. В допълнение, някои други единици, извън системата, са приети за използване заедно с единиците SI.</span></p>
<ul>
<li>
<div align="justify"><span style="color: #000000;">Основни единици SI</span></div>
</li>
<li>
<div align="justify"><span style="color: #000000;">Производни единици SI</span></div>
</li>
</ul>
<p style="padding-left: 30px;" align="justify"><span style="color: #000000;">-  изразени в основни единици SI;</span></p>
<p style="padding-left: 30px;" align="justify"><span style="color: #000000;">-  със специални наименования и означения;</span></p>
<p style="padding-left: 30px;" align="justify"><span style="color: #000000;">-  чиито наименования и означения включват производни единици SI със специални наименования и означения;</span></p>
<ul>
<li>
<div align="justify"><span style="color: #000000;">Единици извън SI</span></div>
</li>
</ul>
<p style="padding-left: 30px;"><span style="color: #000000;">-  Единици, приети, защото са широко използвани;</span></p>
<p style="padding-left: 30px;" align="justify"><span style="color: #000000;">-  Единици, които се използват в специфични области;</span></p>
<p style="padding-left: 30px;" align="justify"><span style="color: #000000;">-  Единици,   които   се   използват   в   специфични   области   и   чиито стойности са експериментално установени.</span></p>
<p style="padding-left: 30px;" align="justify"><span style="color: #000000;"> </span></p>
<div align="center">
<table border="1" cellspacing="0" cellpadding="0">
<tbody>
<tr>
<td colspan="4">
<p align="center"><span style="color: #000000;"><strong><span style="font-family: Calibri; font-size: medium;">Основни единици</span></strong></span></p>
</td>
</tr>
<tr>
<td>
<p align="center"><span style="color: #000000; font-size: medium;"><span style="font-family: Calibri;"><strong>Име</strong><strong></strong></span></span></p>
</td>
<td>
<p align="center"><span style="color: #000000; font-size: medium;"><span style="font-family: Calibri;"><strong>Означение</strong><strong></strong></span></span></p>
</td>
<td>
<p align="center"><span style="color: #000000; font-size: medium;"><span style="font-family: Calibri;"><strong>Мярка за</strong><strong></strong></span></span></p>
</td>
<td>
<p align="center"><span style="color: #000000; font-size: medium;"><span style="font-family: Calibri;"><strong>Определение</strong><strong></strong></span></span></p>
</td>
</tr>
<tr>
<td><span style="color: #000000;"><a title="Метър" href="http://bg.wikipedia.org/wiki/%D0%9C%D0%B5%D1%82%D1%8A%D1%80"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; text-decoration: underline;">метър</span></span></a></span></td>
<td><span style="font-family: Calibri; color: #000000;"><strong>m</strong></span></td>
<td><span style="font-family: Calibri; color: #000000;">Дължина</span></td>
<td><span style="color: #000000;"><span style="font-family: Calibri;">Единицата за дължина е дължината на пътя, изминат от </span><a title="Светлина" href="http://bg.wikipedia.org/wiki/%D0%A1%D0%B2%D0%B5%D1%82%D0%BB%D0%B8%D0%BD%D0%B0"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; text-decoration: underline;">светлината</span></span></a><span style="font-family: Calibri;"> във </span><a title="Вакуум" href="http://bg.wikipedia.org/wiki/%D0%92%D0%B0%D0%BA%D1%83%D1%83%D0%BC"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; text-decoration: underline;">вакуум</span></span></a><span style="font-family: Calibri;"> за интервал от време 1/299792458 от секундата.</span></span></td>
</tr>
<tr>
<td><span style="color: #000000;"><a title="Килограм" href="http://bg.wikipedia.org/wiki/%D0%9A%D0%B8%D0%BB%D0%BE%D0%B3%D1%80%D0%B0%D0%BC"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; text-decoration: underline;">килограм</span></span></a></span></td>
<td><span style="font-family: Calibri; color: #000000;"><strong>kg</strong></span></td>
<td><span style="color: #000000;"><a title="Маса" href="http://bg.wikipedia.org/wiki/%D0%9C%D0%B0%D1%81%D0%B0"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; text-decoration: underline;">Маса</span></span></a></span></td>
<td><span style="color: #000000;"><span style="font-family: Calibri;">Единицата за маса е равна на масата на международния </span><a title="Прототип" href="http://bg.wikipedia.org/wiki/%D0%9F%D1%80%D0%BE%D1%82%D0%BE%D1%82%D0%B8%D0%BF"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; text-decoration: underline;">прототип</span></span></a><span style="font-family: Calibri;"> на килограма (</span><a title="Цилиндър" href="http://bg.wikipedia.org/wiki/%D0%A6%D0%B8%D0%BB%D0%B8%D0%BD%D0%B4%D1%8A%D1%80"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; text-decoration: underline;">цилиндър</span></span></a><span style="font-family: Calibri;">, изработен от </span><a title="Сплав" href="http://bg.wikipedia.org/wiki/%D0%A1%D0%BF%D0%BB%D0%B0%D0%B2"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; text-decoration: underline;">сплав</span></span></a><span style="font-family: Calibri;"> на </span><a title="Платина" href="http://bg.wikipedia.org/wiki/%D0%9F%D0%BB%D0%B0%D1%82%D0%B8%D0%BD%D0%B0"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; text-decoration: underline;">платина</span></span></a><span style="font-family: Calibri;"> и </span><a title="Иридий" href="http://bg.wikipedia.org/wiki/%D0%98%D1%80%D0%B8%D0%B4%D0%B8%D0%B9"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; text-decoration: underline;">иридий</span></span></a><span style="font-family: Calibri;">), съхраняван в Международното бюро по мерки и теглилки (BIPM) в </span><a title="Париж" href="http://bg.wikipedia.org/wiki/%D0%9F%D0%B0%D1%80%D0%B8%D0%B6"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; text-decoration: underline;">Париж</span></span></a><span style="font-family: Calibri;">.</span></span></td>
</tr>
<tr>
<td><span style="color: #000000;"><a title="Секунда" href="http://bg.wikipedia.org/wiki/%D0%A1%D0%B5%D0%BA%D1%83%D0%BD%D0%B4%D0%B0"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">секунда</span></span></a></span></td>
<td><span style="color: #000000;"><strong><span style="font-family: Calibri; font-size: medium;">s</span></strong></span></td>
<td><span style="color: #000000;"><a title="Време" href="http://bg.wikipedia.org/wiki/%D0%92%D1%80%D0%B5%D0%BC%D0%B5"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">Време</span></span></a></span></td>
<td><span style="color: #000000;"><span style="font-family: Calibri;"><span style="font-size: medium;">Единицата за време е продължителността на 9 192 631 770 </span></span><a title="Период" href="http://bg.wikipedia.org/wiki/%D0%9F%D0%B5%D1%80%D0%B8%D0%BE%D0%B4"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">периода</span></span></a><span style="font-family: Calibri; font-size: medium;"> на </span><a title="Лъчение" href="http://bg.wikipedia.org/wiki/%D0%9B%D1%8A%D1%87%D0%B5%D0%BD%D0%B8%D0%B5"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">лъчението</span></span></a><span style="font-family: Calibri; font-size: medium;">, съответстващо на прехода между двете свръхфини нива на основното състояние на атома на </span><a title="Цезий" href="http://bg.wikipedia.org/wiki/%D0%A6%D0%B5%D0%B7%D0%B8%D0%B9"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">Цезий</span></span></a><span style="font-family: Calibri;"><span style="font-size: medium;">-133.</span></span></span></td>
</tr>
<tr>
<td><span style="color: #000000;"><a title="Ампер" href="http://bg.wikipedia.org/wiki/%D0%90%D0%BC%D0%BF%D0%B5%D1%80"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">ампер</span></span></a></span></td>
<td><span style="color: #000000;"><strong><span style="font-family: Calibri; font-size: medium;">A</span></strong></span></td>
<td><span style="color: #000000;"><a title="Електрически ток" href="http://bg.wikipedia.org/wiki/%D0%95%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B8_%D1%82%D0%BE%D0%BA"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">Електрически ток</span></span></a></span></td>
<td><span style="color: #000000;"><span style="font-family: Calibri; font-size: medium;">Единицата за електрически ток е постоянен електрически ток, който при протичане по два успоредни праволинейни </span><a title="Проводник" href="http://bg.wikipedia.org/wiki/%D0%9F%D1%80%D0%BE%D0%B2%D0%BE%D0%B4%D0%BD%D0%B8%D0%BA"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">проводника</span></span></a><span style="font-family: Calibri;"><span style="font-size: medium;"> с безкрайна дължина и незначително кръгово напречно сечение, поставени на разстояние 1 метър един от друг във вакуум, създава между тези два проводника взаимодействие със сила 2.10</span><sup>-7</sup><span style="font-size: medium;"> нютона на всеки метър от тяхната дължина.</span></span></span></td>
</tr>
<tr>
<td><span style="color: #000000;"><a title="Келвин" href="http://bg.wikipedia.org/wiki/%D0%9A%D0%B5%D0%BB%D0%B2%D0%B8%D0%BD"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">келвин</span></span></a></span></td>
<td><span style="color: #000000;"><strong><span style="font-family: Calibri; font-size: medium;">K</span></strong></span></td>
<td><span style="color: #000000;"><a title="Термодинамична температура" href="http://bg.wikipedia.org/wiki/%D0%A2%D0%B5%D1%80%D0%BC%D0%BE%D0%B4%D0%B8%D0%BD%D0%B0%D0%BC%D0%B8%D1%87%D0%BD%D0%B0_%D1%82%D0%B5%D0%BC%D0%BF%D0%B5%D1%80%D0%B0%D1%82%D1%83%D1%80%D0%B0"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">Термодинамична температура</span></span></a></span></td>
<td><span style="color: #000000;"><span style="font-family: Calibri; font-size: medium;">Единицата за термодинамична </span><a title="Температура" href="http://bg.wikipedia.org/wiki/%D0%A2%D0%B5%D0%BC%D0%BF%D0%B5%D1%80%D0%B0%D1%82%D1%83%D1%80%D0%B0"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">температура</span></span></a><span style="font-family: Calibri; font-size: medium;"> представлява 1/273,16 част от термодинамичната температура на </span><a title="Тройна точка" href="http://bg.wikipedia.org/wiki/%D0%A2%D1%80%D0%BE%D0%B9%D0%BD%D0%B0_%D1%82%D0%BE%D1%87%D0%BA%D0%B0"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">тройната точка</span></span></a><span style="font-family: Calibri; font-size: medium;"> на </span><a title="Вода" href="http://bg.wikipedia.org/wiki/%D0%92%D0%BE%D0%B4%D0%B0"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">водата</span></span></a><span style="font-family: Calibri;"><span style="font-size: medium;">.</span></span></span></td>
</tr>
<tr>
<td><span style="color: #000000;"><a title="Мол" href="http://bg.wikipedia.org/wiki/%D0%9C%D0%BE%D0%BB"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">мол</span></span></a></span></td>
<td><span style="color: #000000;"><strong><span style="font-family: Calibri; font-size: medium;">mol</span></strong></span></td>
<td><span style="color: #000000;"><a title="Количество вещество (страницата не съществува)" href="http://bg.wikipedia.org/w/index.php?title=%D0%9A%D0%BE%D0%BB%D0%B8%D1%87%D0%B5%D1%81%D1%82%D0%B2%D0%BE_%D0%B2%D0%B5%D1%89%D0%B5%D1%81%D1%82%D0%B2%D0%BE&amp;action=edit&amp;redlink=1"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">Количество вещество</span></span></a></span></td>
<td><span style="color: #000000;"><span style="font-family: Calibri; font-size: medium;">Единицата за количество вещество е количеството вещество на система, съдържаща толкова структурни единици (елементи), колкото </span><a title="Атом" href="http://bg.wikipedia.org/wiki/%D0%90%D1%82%D0%BE%D0%BC"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">атома</span></span></a><span style="font-family: Calibri; font-size: medium;"> се съдържат в 0,012 килограма </span><a title="Въглерод" href="http://bg.wikipedia.org/wiki/%D0%92%D1%8A%D0%B3%D0%BB%D0%B5%D1%80%D0%BE%D0%B4"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">въглерод</span></span></a><span style="font-family: Calibri;"><span style="font-size: medium;"> 12 (структурните единици са 6,023×10</span><sup>23</sup><span style="font-size: medium;"> или </span></span><a title="Число на Авогадро" href="http://bg.wikipedia.org/wiki/%D0%A7%D0%B8%D1%81%D0%BB%D0%BE_%D0%BD%D0%B0_%D0%90%D0%B2%D0%BE%D0%B3%D0%B0%D0%B4%D1%80%D0%BE"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">число на Авогадро</span></span></a><span style="font-family: Calibri;"><span style="font-size: medium;">).</span></span></span></td>
</tr>
<tr>
<td><span style="color: #000000;"><a title="Кандела" href="http://bg.wikipedia.org/wiki/%D0%9A%D0%B0%D0%BD%D0%B4%D0%B5%D0%BB%D0%B0"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">кандела</span></span></a></span></td>
<td><span style="color: #000000;"><strong><span style="font-family: Calibri; font-size: medium;">cd</span></strong></span></td>
<td><span style="color: #000000;"><a title="Интензитет на светлината" href="http://bg.wikipedia.org/wiki/%D0%98%D0%BD%D1%82%D0%B5%D0%BD%D0%B7%D0%B8%D1%82%D0%B5%D1%82_%D0%BD%D0%B0_%D1%81%D0%B2%D0%B5%D1%82%D0%BB%D0%B8%D0%BD%D0%B0%D1%82%D0%B0"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">Интензитет на светлината</span></span></a></span></td>
<td><span style="color: #000000;"><span style="font-family: Calibri; font-size: medium;">Единицата за </span><a title="Интензитет на светлината" href="http://bg.wikipedia.org/wiki/%D0%98%D0%BD%D1%82%D0%B5%D0%BD%D0%B7%D0%B8%D1%82%D0%B5%D1%82_%D0%BD%D0%B0_%D1%81%D0%B2%D0%B5%D1%82%D0%BB%D0%B8%D0%BD%D0%B0%D1%82%D0%B0"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">интензитет на светлината</span></span></a><span style="font-family: Calibri; font-size: medium;"> е силата на светлината в дадена посока от източник, излъчващ монохроматично лъчение с </span><a title="Честота" href="http://bg.wikipedia.org/wiki/%D0%A7%D0%B5%D1%81%D1%82%D0%BE%D1%82%D0%B0"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">честота</span></span></a><span style="font-family: Calibri;"><span style="font-size: medium;"> 540.10</span><sup>12</sup><span style="font-size: medium;"> херца и интензитет на лъчението в тази посока 1/683 вата на стерадиан.</span></span></span></td>
</tr>
</tbody>
</table>
</div>
<p><span style="color: #000000;"> </span></p>
<h3><span style="color: #000000; font-size: large;">Допълнителни и производни единици</span></h3>
<p align="justify"><span style="font-family: Calibri; color: #000000;"><span style="font-size: medium;">Единиците за ъгъл се смятат за специален клас допълнителни единици (по предложение на BIPM). Производните единици в SI се получават чрез произведения от степени на основните единици SI и/или допълнителните единици SI и служат за измерване на други количества. Макар че всички основни единици могат да се комбинират, не всички получени количества имат имена.</span></span></p>
<p align="justify"><span style="color: #000000;"> </span></p>
<table border="1" cellspacing="0" cellpadding="0">
<tbody>
<tr>
<td colspan="4">
<p align="center"><span style="font-family: Calibri; color: #000000;"><span style="font-size: medium;"><strong>Единици за ъгъл</strong><strong></strong></span></span></p>
</td>
</tr>
<tr>
<td>
<p align="center"><span style="font-family: Calibri; color: #000000;"><span style="font-size: medium;"><strong>Име</strong><strong></strong></span></span></p>
</td>
<td>
<p align="center"><span style="font-family: Calibri; color: #000000;"><span style="font-size: medium;"><strong>Означение</strong><strong></strong></span></span></p>
</td>
<td>
<p align="center"><span style="font-family: Calibri; color: #000000;"><span style="font-size: medium;"><strong>Мярка за</strong><strong></strong></span></span></p>
</td>
<td>
<p align="center"><span style="font-family: Calibri; color: #000000;"><span style="font-size: medium;"><strong>Определение</strong><strong></strong></span></span></p>
</td>
</tr>
<tr>
<td><span style="color: #000000;"><a title="Радиан" href="http://bg.wikipedia.org/wiki/%D0%A0%D0%B0%D0%B4%D0%B8%D0%B0%D0%BD"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">радиан</span></span></a></span></td>
<td><span style="color: #000000;"><strong><span style="font-family: Calibri; font-size: medium;">rad</span></strong></span></td>
<td><span style="font-family: Calibri; color: #000000; font-size: medium;">Равнинен ъгъл</span></td>
<td><span style="font-family: Calibri; color: #000000;"><span style="font-size: medium;">Радиан е ъгълът между два радиуса на кръг, които отрязват от окръжността му дъга, равна на неговия радиус.</span></span></td>
</tr>
<tr>
<td><span style="color: #000000;"><a title="Стерадиан" href="http://bg.wikipedia.org/wiki/%D0%A1%D1%82%D0%B5%D1%80%D0%B0%D0%B4%D0%B8%D0%B0%D0%BD"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">стерадиан</span></span></a></span></td>
<td><span style="color: #000000;"><strong><span style="font-family: Calibri; font-size: medium;">sr</span></strong></span></td>
<td><span style="font-family: Calibri; color: #000000; font-size: medium;">Пространствен ъгъл</span></td>
<td><span style="font-family: Calibri; color: #000000;"><span style="font-size: medium;">Стерадиан е пространственият ъгъл на конус с връх в центъра на сфера с радиус <em>r</em>, който отрязва от повърхността на сферата площ, равна на площта на квадрат със страна, равна на радиуса на сферата (<em>r</em><em>²</em>).</span></span></td>
</tr>
</tbody>
</table>
<p align="justify"><span style="color: #000000;">  </span></p>
<table border="1" cellspacing="0" cellpadding="0">
<tbody>
<tr>
<td colspan="4">
<p align="center"><span style="font-family: Calibri; color: #000000;"><span style="font-size: medium;"><strong>Производни единици</strong><strong></strong></span></span></p>
</td>
</tr>
<tr>
<td>
<p align="center"><span style="font-family: Calibri; color: #000000;"><span style="font-size: medium;"><strong>Мярка за</strong><strong></strong></span></span></p>
</td>
<td>
<p align="center"><span style="font-family: Calibri; color: #000000;"><span style="font-size: medium;"><strong>Име</strong><strong></strong></span></span></p>
</td>
<td>
<p align="center"><span style="font-family: Calibri; color: #000000;"><span style="font-size: medium;"><strong>Означение</strong><strong></strong></span></span></p>
</td>
<td>
<p align="center"><span style="font-family: Calibri; color: #000000;"><span style="font-size: medium;"><strong>Изразяване чрез основни единици</strong><strong></strong></span></span></p>
</td>
</tr>
<tr>
<td><span style="color: #000000;"><a title="Честота" href="http://bg.wikipedia.org/wiki/%D0%A7%D0%B5%D1%81%D1%82%D0%BE%D1%82%D0%B0"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">Честота</span></span></a></span></td>
<td><span style="color: #000000;"><a title="Херц" href="http://bg.wikipedia.org/wiki/%D0%A5%D0%B5%D1%80%D1%86"><span style="color: #000000;"><strong><span style="text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">херц</span></span></strong></span></a></span></td>
<td><span style="color: #000000;"><strong><span style="font-family: Calibri; font-size: medium;">Hz</span></strong></span></td>
<td><span style="font-family: Calibri; color: #000000;"><span style="font-size: medium;">s</span><sup>-1</sup></span></td>
</tr>
<tr>
<td><span style="color: #000000;"><a title="Сила" href="http://bg.wikipedia.org/wiki/%D0%A1%D0%B8%D0%BB%D0%B0"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">Сила</span></span></a></span></td>
<td><span style="color: #000000;"><a title="Нютон (единица)" href="http://bg.wikipedia.org/wiki/%D0%9D%D1%8E%D1%82%D0%BE%D0%BD_(%D0%B5%D0%B4%D0%B8%D0%BD%D0%B8%D1%86%D0%B0)"><span style="color: #000000;"><strong><span style="text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">нютон</span></span></strong></span></a></span></td>
<td><span style="color: #000000;"><strong><span style="font-family: Calibri; font-size: medium;">N</span></strong></span></td>
<td><span style="font-family: Calibri; color: #000000; font-size: medium;">kg.m/s ²</span></td>
</tr>
<tr>
<td><span style="color: #000000;"><a title="Енергия" href="http://bg.wikipedia.org/wiki/%D0%95%D0%BD%D0%B5%D1%80%D0%B3%D0%B8%D1%8F"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">Енергия</span></span></a></span></td>
<td><span style="color: #000000;"><a title="Джаул" href="http://bg.wikipedia.org/wiki/%D0%94%D0%B6%D0%B0%D1%83%D0%BB"><span style="color: #000000;"><strong><span style="text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">джаул</span></span></strong></span></a></span></td>
<td><span style="color: #000000;"><strong><span style="font-family: Calibri; font-size: medium;">J</span></strong></span></td>
<td><span style="font-family: Calibri; color: #000000; font-size: medium;">N.m = kg.m²/s²</span></td>
</tr>
<tr>
<td><span style="color: #000000;"><a title="Мощност" href="http://bg.wikipedia.org/wiki/%D0%9C%D0%BE%D1%89%D0%BD%D0%BE%D1%81%D1%82"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">Мощност</span></span></a></span></td>
<td><span style="color: #000000;"><a title="Ват" href="http://bg.wikipedia.org/wiki/%D0%92%D0%B0%D1%82"><span style="color: #000000;"><strong><span style="text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">ват</span></span></strong></span></a></span></td>
<td><span style="color: #000000;"><strong><span style="font-family: Calibri; font-size: medium;">W</span></strong></span></td>
<td><span style="font-family: Calibri; color: #000000;"><span style="font-size: medium;">J/s = kg.m²/s</span><sup>3</sup></span></td>
</tr>
<tr>
<td><span style="color: #000000;"><a title="Налягане" href="http://bg.wikipedia.org/wiki/%D0%9D%D0%B0%D0%BB%D1%8F%D0%B3%D0%B0%D0%BD%D0%B5"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">Налягане</span></span></a><span style="font-family: Calibri; font-size: medium;">, </span><a title="Механично напрежение" href="http://bg.wikipedia.org/wiki/%D0%9C%D0%B5%D1%85%D0%B0%D0%BD%D0%B8%D1%87%D0%BD%D0%BE_%D0%BD%D0%B0%D0%BF%D1%80%D0%B5%D0%B6%D0%B5%D0%BD%D0%B8%D0%B5"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">механично напрежение</span></span></a></span></td>
<td><span style="color: #000000;"><a title="Паскал" href="http://bg.wikipedia.org/wiki/%D0%9F%D0%B0%D1%81%D0%BA%D0%B0%D0%BB"><span style="color: #000000;"><strong><span style="text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">паскал</span></span></strong></span></a></span></td>
<td><span style="color: #000000;"><strong><span style="font-family: Calibri; font-size: medium;">Pa</span></strong></span></td>
<td><span style="font-family: Calibri; color: #000000; font-size: medium;">N/m² = kg/(m.s²)</span></td>
</tr>
<tr>
<td><span style="color: #000000;"><a title="Светлинен поток" href="http://bg.wikipedia.org/wiki/%D0%A1%D0%B2%D0%B5%D1%82%D0%BB%D0%B8%D0%BD%D0%B5%D0%BD_%D0%BF%D0%BE%D1%82%D0%BE%D0%BA"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">Светлинен поток</span></span></a></span></td>
<td><span style="color: #000000;"><a title="Лумен" href="http://bg.wikipedia.org/wiki/%D0%9B%D1%83%D0%BC%D0%B5%D0%BD"><span style="color: #000000;"><strong><span style="text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">лумен</span></span></strong></span></a></span></td>
<td><span style="color: #000000;"><strong><span style="font-family: Calibri; font-size: medium;">lm</span></strong></span></td>
<td><span style="font-family: Calibri; color: #000000; font-size: medium;">cd.sr</span></td>
</tr>
<tr>
<td><span style="color: #000000;"><a title="Осветеност" href="http://bg.wikipedia.org/wiki/%D0%9E%D1%81%D0%B2%D0%B5%D1%82%D0%B5%D0%BD%D0%BE%D1%81%D1%82"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">Осветеност</span></span></a></span></td>
<td><span style="color: #000000;"><a title="Лукс" href="http://bg.wikipedia.org/wiki/%D0%9B%D1%83%D0%BA%D1%81"><span style="color: #000000;"><strong><span style="text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">лукс</span></span></strong></span></a></span></td>
<td><span style="color: #000000;"><strong><span style="font-family: Calibri; font-size: medium;">lx</span></strong></span></td>
<td><span style="font-family: Calibri; color: #000000; font-size: medium;">cd sr/m²</span></td>
</tr>
<tr>
<td><span style="color: #000000;"><a title="Електрически заряд" href="http://bg.wikipedia.org/wiki/%D0%95%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B8_%D0%B7%D0%B0%D1%80%D1%8F%D0%B4"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">Електрически заряд</span></span></a></span></td>
<td><span style="color: #000000;"><a title="Кулон" href="http://bg.wikipedia.org/wiki/%D0%9A%D1%83%D0%BB%D0%BE%D0%BD"><span style="color: #000000;"><strong><span style="text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">кулон</span></span></strong></span></a></span></td>
<td><span style="color: #000000;"><strong><span style="font-family: Calibri; font-size: medium;">C</span></strong></span></td>
<td><span style="font-family: Calibri; color: #000000; font-size: medium;">A.s</span></td>
</tr>
<tr>
<td><span style="color: #000000;"><a title="Електрически потенциал" href="http://bg.wikipedia.org/wiki/%D0%95%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B8_%D0%BF%D0%BE%D1%82%D0%B5%D0%BD%D1%86%D0%B8%D0%B0%D0%BB"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">Електрически потенциал</span></span></a></span></td>
<td><span style="color: #000000;"><a title="Волт" href="http://bg.wikipedia.org/wiki/%D0%92%D0%BE%D0%BB%D1%82"><span style="color: #000000;"><strong><span style="text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">волт</span></span></strong></span></a></span></td>
<td><span style="color: #000000;"><strong><span style="font-family: Calibri; font-size: medium;">V</span></strong></span></td>
<td><span style="font-family: Calibri; color: #000000;"><span style="font-size: medium;">J/C = kg m²/A s</span><sup>3</sup></span></td>
</tr>
<tr>
<td><span style="color: #000000;"><a title="Електрическо съпротивление" href="http://bg.wikipedia.org/wiki/%D0%95%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%BE_%D1%81%D1%8A%D0%BF%D1%80%D0%BE%D1%82%D0%B8%D0%B2%D0%BB%D0%B5%D0%BD%D0%B8%D0%B5"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">Електрическо съпротивление</span></span></a></span></td>
<td><span style="color: #000000;"><a title="Ом" href="http://bg.wikipedia.org/wiki/%D0%9E%D0%BC"><span style="color: #000000;"><strong><span style="text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">ом</span></span></strong></span></a></span></td>
<td><span style="color: #000000;"><strong><span style="font-family: Calibri; font-size: medium;">Ω</span></strong></span></td>
<td><span style="font-family: Calibri; color: #000000;"><span style="font-size: medium;">V/A = kg.m²/s</span><sup>3</sup><span style="font-size: medium;">.A²</span></span></td>
</tr>
<tr>
<td><span style="color: #000000;"><a title="Електрически капацитет" href="http://bg.wikipedia.org/wiki/%D0%95%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B8_%D0%BA%D0%B0%D0%BF%D0%B0%D1%86%D0%B8%D1%82%D0%B5%D1%82"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">Електрически капацитет</span></span></a></span></td>
<td><span style="color: #000000;"><a title="Фарад" href="http://bg.wikipedia.org/wiki/%D0%A4%D0%B0%D1%80%D0%B0%D0%B4"><span style="color: #000000;"><strong><span style="text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">фарад</span></span></strong></span></a></span></td>
<td><span style="color: #000000;"><strong><span style="font-family: Calibri; font-size: medium;">F</span></strong></span></td>
<td><span style="font-family: Calibri; color: #000000;"><span style="font-size: medium;">A².s</span><sup>4</sup><span style="font-size: medium;">/kg.m²</span></span></td>
</tr>
<tr>
<td><span style="color: #000000;"><a title="Магнитен поток" href="http://bg.wikipedia.org/wiki/%D0%9C%D0%B0%D0%B3%D0%BD%D0%B8%D1%82%D0%B5%D0%BD_%D0%BF%D0%BE%D1%82%D0%BE%D0%BA"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">Магнитен поток</span></span></a></span></td>
<td><span style="color: #000000;"><a title="Вебер (единица)" href="http://bg.wikipedia.org/wiki/%D0%92%D0%B5%D0%B1%D0%B5%D1%80_(%D0%B5%D0%B4%D0%B8%D0%BD%D0%B8%D1%86%D0%B0)"><span style="color: #000000;"><strong><span style="text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">вебер</span></span></strong></span></a></span></td>
<td><span style="color: #000000;"><strong><span style="font-family: Calibri; font-size: medium;">Wb</span></strong></span></td>
<td><span style="font-family: Calibri; color: #000000; font-size: medium;">kg m²/s² A</span></td>
</tr>
<tr>
<td><span style="color: #000000;"><a title="Магнитна индукция" href="http://bg.wikipedia.org/wiki/%D0%9C%D0%B0%D0%B3%D0%BD%D0%B8%D1%82%D0%BD%D0%B0_%D0%B8%D0%BD%D0%B4%D1%83%D0%BA%D1%86%D0%B8%D1%8F"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">Магнитна индукция</span></span></a></span></td>
<td><span style="color: #000000;"><a title="Тесла" href="http://bg.wikipedia.org/wiki/%D0%A2%D0%B5%D1%81%D0%BB%D0%B0"><span style="color: #000000;"><strong><span style="text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">тесла</span></span></strong></span></a></span></td>
<td><span style="color: #000000;"><strong><span style="font-family: Calibri; font-size: medium;">T</span></strong></span></td>
<td><span style="font-family: Calibri; color: #000000; font-size: medium;">Wb/m² = kg/s² A</span></td>
</tr>
<tr>
<td><span style="color: #000000;"><a title="Индуктивност" href="http://bg.wikipedia.org/wiki/%D0%98%D0%BD%D0%B4%D1%83%D0%BA%D1%82%D0%B8%D0%B2%D0%BD%D0%BE%D1%81%D1%82"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">Индуктивност</span></span></a></span></td>
<td><span style="color: #000000;"><a title="Хенри (единица)" href="http://bg.wikipedia.org/wiki/%D0%A5%D0%B5%D0%BD%D1%80%D0%B8_(%D0%B5%D0%B4%D0%B8%D0%BD%D0%B8%D1%86%D0%B0)"><span style="color: #000000;"><strong><span style="text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">хенри</span></span></strong></span></a></span></td>
<td><span style="color: #000000;"><strong><span style="font-family: Calibri; font-size: medium;">H</span></strong></span></td>
<td><span style="font-family: Calibri; color: #000000; font-size: medium;">kg m²/s² A²</span></td>
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<tr>
<td><span style="color: #000000;"><a title="Електрическа проводимост" href="http://bg.wikipedia.org/wiki/%D0%95%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B0_%D0%BF%D1%80%D0%BE%D0%B2%D0%BE%D0%B4%D0%B8%D0%BC%D0%BE%D1%81%D1%82"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">Електрическа проводимост</span></span></a></span></td>
<td><span style="color: #000000;"><a title="Сименс (единица)" href="http://bg.wikipedia.org/wiki/%D0%A1%D0%B8%D0%BC%D0%B5%D0%BD%D1%81_(%D0%B5%D0%B4%D0%B8%D0%BD%D0%B8%D1%86%D0%B0)"><span style="color: #000000;"><strong><span style="text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">сименс</span></span></strong></span></a></span></td>
<td><span style="color: #000000;"><strong><span style="font-family: Calibri; font-size: medium;">S</span></strong></span></td>
<td><span style="font-family: Calibri; color: #000000;"><span style="font-size: medium;">Ω </span><sup>-1</sup><span style="font-size: medium;"> = kg</span><sup>-1</sup><span style="font-size: medium;"> m</span><sup>-2</sup><span style="font-size: medium;"> s</span><sup>3</sup><span style="font-size: medium;"> A²</span></span></td>
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<tr>
<td><span style="color: #000000;"><a title="Активност на радиоактивен източник" href="http://bg.wikipedia.org/wiki/%D0%90%D0%BA%D1%82%D0%B8%D0%B2%D0%BD%D0%BE%D1%81%D1%82_%D0%BD%D0%B0_%D1%80%D0%B0%D0%B4%D0%B8%D0%BE%D0%B0%D0%BA%D1%82%D0%B8%D0%B2%D0%B5%D0%BD_%D0%B8%D0%B7%D1%82%D0%BE%D1%87%D0%BD%D0%B8%D0%BA"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">Активност на радиоактивен източник</span></span></a></span></td>
<td><span style="color: #000000;"><a title="Бекерел" href="http://bg.wikipedia.org/wiki/%D0%91%D0%B5%D0%BA%D0%B5%D1%80%D0%B5%D0%BB"><span style="color: #000000;"><strong><span style="text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">бекерел</span></span></strong></span></a></span></td>
<td><span style="color: #000000;"><strong><span style="font-family: Calibri; font-size: medium;">Bq</span></strong></span></td>
<td><span style="font-family: Calibri; color: #000000;"><span style="font-size: medium;">s</span><sup>-1</sup></span></td>
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<tr>
<td><span style="color: #000000;"><a title="Погълната доза (страницата не съществува)" href="http://bg.wikipedia.org/w/index.php?title=%D0%9F%D0%BE%D0%B3%D1%8A%D0%BB%D0%BD%D0%B0%D1%82%D0%B0_%D0%B4%D0%BE%D0%B7%D0%B0&amp;action=edit&amp;redlink=1"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Calibri; color: #800080; font-size: medium; text-decoration: underline;">Погълната доза</span></span></a><span style="font-family: Calibri; font-size: medium;"> (от </span><a title="Йонизираща радиация" href="http://bg.wikipedia.org/wiki/%D0%99%D0%BE%D0%BD%D0%B8%D0%B7%D0%B8%D1%80%D0%B0%D1%89%D0%B0_%D1%80%D0%B0%D0%B4%D0%B8%D0%B0%D1%86%D0%B8%D1%8F"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Calibri; color: #800080; font-size: medium; text-decoration: underline;">йонизираща радиация</span></span></a><span style="font-family: Calibri;"><span style="font-size: medium;">)</span></span></span></td>
<td><span style="color: #000000;"><a title="Грей" href="http://bg.wikipedia.org/wiki/%D0%93%D1%80%D0%B5%D0%B9"><span style="color: #000000;"><strong><span style="text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">грей</span></span></strong></span></a></span></td>
<td><span style="color: #000000;"><strong><span style="font-family: Calibri; font-size: medium;">Gy</span></strong></span></td>
<td><span style="font-family: Calibri; color: #000000; font-size: medium;">J/kg = m²/s²</span></td>
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<tr>
<td><span style="color: #000000;"><a title="Еквивалентна доза (страницата не съществува)" href="http://bg.wikipedia.org/w/index.php?title=%D0%95%D0%BA%D0%B2%D0%B8%D0%B2%D0%B0%D0%BB%D0%B5%D0%BD%D1%82%D0%BD%D0%B0_%D0%B4%D0%BE%D0%B7%D0%B0&amp;action=edit&amp;redlink=1"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Calibri; color: #800080; font-size: medium; text-decoration: underline;">Еквивалентна доза</span></span></a><span style="font-family: Calibri; font-size: medium;"> (от </span><a title="Йонизираща радиация" href="http://bg.wikipedia.org/wiki/%D0%99%D0%BE%D0%BD%D0%B8%D0%B7%D0%B8%D1%80%D0%B0%D1%89%D0%B0_%D1%80%D0%B0%D0%B4%D0%B8%D0%B0%D1%86%D0%B8%D1%8F"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Calibri; color: #800080; font-size: medium; text-decoration: underline;">йонизираща радиация</span></span></a><span style="font-family: Calibri;"><span style="font-size: medium;">)</span></span></span></td>
<td><span style="color: #000000;"><strong><a title="Сиверт" href="http://bg.wikipedia.org/wiki/%D0%A1%D0%B8%D0%B2%D0%B5%D1%80%D1%82"><span style="color: #000000; text-decoration: underline;"><span style="font-family: Times New Roman; color: #0000ff; font-size: medium; text-decoration: underline;">сиверт</span></span></a></strong></span></td>
<td><span style="color: #000000; font-size: medium;"><span style="font-family: Calibri;"><strong>Sv</strong></span></span></td>
<td><span style="color: #000000; font-size: medium;"><span style="font-family: Calibri;">J/kg = m²/s²</span></span></td>
</tr>
</tbody>
</table>
<p align="justify"><span style="color: #000000;"> </span></p>
<h5><span style="color: #000000;"><em><strong>Източник: Уикипедия </strong></em> </span></h5>
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