In physics and engineering, in particular fluid dynamics and hydrometry, the volumetric flow rate, (also known as volume flow rate, rate of fluid flow or volume velocity) is the volume of fluid which passes per unit time; usually represented by the symbol Q (sometimes VÌ). The SI unit is m3/s (cubic metres per second).
The symptoms of the disease were black and purple spots on the body. The spots soon began to become enlarged and swollen. The victims were taken captive by death in about two to seven days. The plague lasted for four years, but it still remained a recurrent fear until the seventeenth century.
it is estimated that approximately 20 million people died in europe from the black death this is about one third of the population many cities lost more than 40 % of their residents paris lost half and venice hamburg and bremen are estimated to have lost at least 60 % of their populationst is estimated that approximately 20 million people died in europe from the black death this is about one third of the population many cities lost more than 40 % of their residents paris lost half and venice hamburg and bremen are estimated to have lost at least 60 % of their populations