Air is kept in a tank at pressure P. = 689 KPa abs and temperature T = 17°C. If one allows the air to issue out in a one-dimensional isentropic flow, the greatest possible flow per unit area is Blank 1 kg/m²-s. For air, Use R = 287 J/kg-K and Mol. Wt. = 29.1 *Express your answers in whole significant figure without decimal value and without unit*