There is little value in comparing a mass meter output with that of a volume tank. without a measure of density to allow conversion between mass and volume. For flow measurement, the standard is a. system comprising of a measure of quantity and the subsidiary measurements to determine the fluid conditions, properties. and influence factors. Another feature of the standard is that there must be confidence. that the measurement taken by the standard is accurate.
Ravenclaw values intelligence, creativity, learning, and wit. The house mascot is an eagle and the house colours are blue and bronze (blue and grey in the films). The head of this house is the Charms professor, Filius Flitwick, and the house ghost is The Grey Lady. According to Rowling, Ravenclaw corresponds roughly to the element of air.
, Potterhead forever. Professor Flitwick was the head of Ravenclaw house whilst Harry was at school, and possibly many years before and after. Rowena Ravenclaw founded Ravenclaw house as one of the four founders of Hogwarts sometime in the medieval times. Helena Ravenclaw was the ghost of Ravenclaw tower, she was also the daughter of Rowena.