... volume and massLength is the distance between two points. The standard unit of length is themetre, although the centimetre, cm, millimetre, mm and kilometre, km,areoften used.1cmD 10 mm, 1mD ... pressure of a fixed mass ofgas at constant volume, may be used to measure temperature. This thermometeris cumbersome and rarely used to measure temperature directly, but it is oftenused as a standard ... oftemperature.For example, mercury contained in a thermometer has a volume of 476 mm3at 15°C. When the volume is, say, 478 mm3then:final volume, V2D V1[1 C t2 t1], from equation...