Figure 1 shows line diagram of a filling of tank. 1 - Determine the voltage drop between the nozzle and grounded tank, and the energy stored in the nozzle. 2 - Determine the hose diameter required to avoid the potential hazard due to static charge? I need the hose diameter equation/part 2

Table 1. Data related to Figure 1 [You may consider flanges are 2 inch in diameter and having a gap of 0.25 inch] Page 2 of 4 Figure 1. Line diagram of tank filling operation