Solid food particles having nominal size of 0.2 mm with shape factor of 0.8 and density of 1040 kg m^-3 are to be fluidized using air at 28°C. The density and pressure of air at the above-mentioned condition are 1.175 kg m^-3 and 1.013×10⁵ Pa, respectively. The voidage at minimum fluidizing condition is 0.48. Use the value of ‘g’ as 9.81 m s^-2. If cross section of the empty bed is 0.5 m² and contains 520 kg of solids, the pressure drop at minimum fluidization condition is