Özgül Ağırlık
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Tanım
Bir maddenin yoğunluğunun referans maddenin (sıvı ve katılar için genellikle 4 °C'deki su) yoğunluğuna boyutsuz oranı.
Açıklama
Gold has a specific gravity of 19.3, meaning it is 19.3 times denser than water. Ice has a specific gravity of 0.917, which explains why it floats (any value below 1.0 floats in water). Specific gravity equals density in g/cm³ for liquids and solids, since water’s density is approximately 1.000 g/cm³ at 4°C. Brewers use specific gravity (typically 1.040–1.060 for wort) to estimate alcohol content after fermentation.
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RELATED TERMS
Mutlak Sıfır
Mümkün olan en düşük sıcaklık: 0 K, -273,15 °C veya -459,67 °F.
Kalori
Bir enerji birimi; küçük kalori (cal) 1 g suyu 1 °C ısıtır, besin Kalorisi (kcal) ise 1000 küçük kaloriye eşittir.
Mach Sayısı
Bir cismin hızının, bulunduğu ortamdaki ses hızına oranı.
Işık Yılı
Işığın bir yılda vakumda aldığı yol: yaklaşık 9,461 trilyon kilometre.
Elektron Volt
Bir elektronun 1 voltluk potansiyel farkında kazandığı kinetik enerjiye eşit enerji birimi.