Медицинская энциклопедия

Приложение. Основные и дополнительные единицы измерений международной системы единиц

|                                 |                        |                                |                     | Обозначения                     |

| Величина                 | Наименование | Определение           | Размерность |------------------------------------------|

|                                 |                        |                                |                     | русское | международное  |

|------------------------------------------------------------------------------------------------------------------------------------------------------------|

|                                 |                        | Основные единицы  |                     |              |                           |

|------------------------------------------------------------------------------------------------------------------------------------------------------------|

| Длина                      | метр              | Длина, равная         | L                   | м (м)     | m                       |

|                                 |                        | 1650763,73 длин      |                     |              |                           |

|                                 |                        | волн излучения в     |                     |              |                           |

|                                 |                        | вакууме,                  |                     |              |                           |

|                                 |                        | соответствующего   |                     |              |                           |

|                                 |                        | переходу между      |                     |              |                           |

|                                 |                        | уровнями 2p10 и 5d5   |                     |              |                           |

|                                 |                        | атома криптона‑86   |                     |              |                           |

|------------------------------------------------------------------------------------------------------------------------------------------------------------|

| Масса                      | килограмм    | Представлен           | М                  | кг (кг)    | kg                      |

|                                 |                        | массой                    |                     |              |                           |

|                                 |                        | международного      |                     |              |                           |

|                                 |                        | платиноиридиевого  |                     |              |                           |

|                                 |                        | прототипа                |                     |              |                           |

|                                 |                        | килограмма             |                     |              |                           |

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| Время                      | секунда         | Отрезок времени,    | Т                  | с (сек.)  | s                        |

|                                 |                        | равный 9192631770  |                     |              |                           |

|                                 |                        | периодам                |                     |              |                           |

|                                 |                        | излучения,               |                     |              |                           |

|                                 |                        | соответствующего   |                     |              |                           |

|                                 |                        | переходу между      |                     |              |                           |

|                                 |                        | двумя                      |                     |              |                           |

|                                 |                        | сверхтонкими          |                     |              |                           |

|                                 |                        | уровнями                 |                     |              |                           |

|                                 |                        | основного                |                     |              |                           |

|                                 |                        | состояния атома      |                     |              |                           |

|                                 |                        | цезия‑133                |                     |              |                           |

|------------------------------------------------------------------------------------------------------------------------------------------------------------|

| Сила                        | ампер            | Величина, равная    | I                    | А (а)      | A                       |

| электрического тока |                        | силе не                    |                     |              |                           |

|                                 |                        | изменяющегося       |                     |              |                           |

|                                 |                        | тока, который при    |                     |              |                           |

|                                 |                        | прохождении по       |                     |              |                           |

|                                 |                        | двум                       |                     |              |                           |

|                                 |                        | параллельным         |                     |              |                           |

|                                 |                        | прямолинейным       |                     |              |                           |

|                                 |                        | проводникам           |                     |              |                           |

|                                 |                        | бесконечной длины  |                     |              |                           |

|                                 |                        | и ничтожно малого   |                     |              |                           |

|                                 |                        | кругового сечения,  |                      |              |                           |

|                                 |                        | расположенным на  |                      |              |                           |

|                                 |                        | расстоянии одного   |                     |              |                           |

|                                 |                        | метра один от          |                     |              |                           |

|                                 |                        | другого в пустоте,   |                     |              |                           |

|                                 |                        | вызвал бы между    |                     |              |                           |

|                                 |                        | этими                      |                     |              |                           |

|                                 |                        | проводниками силу, |                     |              |                           |

|                                 |                        | равную 2∙10‑7 Н на   |                     |              |                           |

|                                 |                        | каждый метр длины |                     |              |                           |

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| Термодинамическая | кельвин         | Величина,                | θ                   | К (°К)    | К                        |

| температура            | (градус           | составляющая         |                     |              |                           |

| (температура)          | Кельвина)       | 1/273,16 часть         |                     |              |                           |

|                                 |                        | термодинамической |                     |              |                           |

|                                 |                        | температуры           |                     |              |                           |

|                                 |                        | тройной точки воды |                      |              |                           |

|------------------------------------------------------------------------------------------------------------------------------------------------------------|

| Количество              | моль              | Количество              | N                  | моль (   | mol                    |

| вещества                 |                        | вещества системы,  |                     | моль)    |                           |

|                                 |                        | содержащей            |                     |              |                           |

|                                 |                        | столько же              |                     |              |                           |

|                                 |                        | структурных            |                     |              |                           |

|                                 |                        | элементов, сколько  |                     |              |                           |

|                                 |                        | содержится атомов  |                     |              |                           |

|                                 |                        | в углероде‑12          |                     |              |                           |

|                                 |                        | массой 0,012 кг       |                     |              |                           |

|------------------------------------------------------------------------------------------------------------------------------------------------------------|

| Сила света               | кандела         | Сила света,             | J                   | кд (св)   | cd                      |

|                                 | (свеча)            | испускаемого с        |                     |              |                           |

|                                 |                        | поверхности            |                     |              |                           |

|                                 |                        | площадью 1/600      |                     |              |                           |

|                                 |                        | 000 м2 полного         |                     |              |                           |

|                                 |                        | излучателя в           |                     |              |                           |

|                                 |                        | перпендикулярном   |                     |              |                           |

|                                 |                        | направлении при      |                     |              |                           |

|                                 |                        | температуре            |                     |              |                           |

|                                 |                        | излучателя, равной  |                     |              |                           |

|                                 |                        | температуре            |                     |              |                           |

|                                 |                        | затвердевания         |                     |              |                           |

|                                 |                        | платины при            |                     |              |                           |

|                                 |                        | давлении 101325     |                     |              |                           |

|                                 |                        | Па                           |                     |              |                           |

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|                                 |                        | Дополнительные      |                     |              |                           |

|                                 |                        | единицы                  |                     |              |                           |

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| Плоский угол            | радиан          | Центральный угол,  | —                 | рад (     | rad                     |

|                                 |                        | соответствующий    |                     | рад)      |                           |

|                                 |                        | дуге, длина которой |                     |              |                           |

|                                 |                        | равна ее радиусу    |                     |              |                           |

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| Телесный угол         | стерадиан     | Величина телесного | —                 | ср         | sr                       |

|                                 |                        | угла, вырезающего  |                     | (стер)    |                           |

|                                 |                        | на сфере,                |                     |              |                           |

|                                 |                        | описанной вокруг     |                     |              |                           |

|                                 |                        | вершинного угла,     |                     |              |                           |

|                                 |                        | поверхность,           |                     |              |                           |

|                                 |                        | площадь которой     |                     |              |                           |

|                                 |                        | равна квадрату        |                     |              |                           |

|                                 |                        | радиуса сферы       |                     |              |                           |



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