Calculate the charge developed on a vessel being filled with carbon black. Consider two filling methods: (a) pouring from an open vessel and (b) pneumatic transport. Assume the vessel has a volume of 1.89 m3 and
carbon black feed rate is 5 kg/s. Determine the accumulated charge and the energy. Does the energy exceed the MIE for dusts?  Use 1,800 kg/m3 for carbon black bulk density