Density
01
الكثافة, الكتلة الحجمية
(physics) the degree to which a substance is compacted, measured by dividing its mass by its volume
أمثلة
The density of water is approximately 1 gram per cubic centimeter ( g / cm³ ).
الكثافة للماء هي حوالي 1 غرام لكل سنتيمتر مكعب (غ/سم³).
Air has a much lower density compared to water, which is why objects float in water but fall through air.
الهواء له كثافة أقل بكثير مقارنة بالماء، ولهذا تطفو الأجسام في الماء ولكنها تسقط عبر الهواء.
02
الكثافة, التركيز
the spatial property of having elements packed closely together, typically expressed as the number of units per given area or volume
أمثلة
Urban planners analyze population density to determine where to build new transit lines.
يحلل مخططو المدن كثافة السكان لتحديد مكان بناء خطوط النقل الجديدة.
The forest survey measured tree density at 550 specimens per hectare.
قياس المسح الغابي كثافة الأشجار عند 550 عينة لكل هكتار.
03
the degree to which light is blocked or absorbed by a photographic filter or film, usually measured in stops or optical density units
أمثلة
The photographer adjusted the filter density to reduce glare.
The technician calibrated the density of the photographic plate.
