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.
The black death: In Europe the Black Plague was raging from 1348 until 1350. During that time it killed not thousands but millions of people. Just in Europe 25 million people died because of the plague, which is one-third of Europeâs population at that time.World wide it is supposed that the plague has killed over 75 million people. It took the world over 150 years to recuperate from the Black Death.he black death, plague: The black death, plague spreading: The outbreak was so terrible that there were no more places to burry the dead and they were left out on the open. The plague only âworkedâ when it was warm during the winter it stood but only because the fleas were dormant.