Physical property Unit of measurement No. of samples Mean value Minimum value Maximum value Standard deviation Major diameter, a mm 100 13.11 10.30 16.50 1.29 Intermediate diameter, b mm 100 11.75 10.08 13.50 0.85 Minor diameter, c Mm 100 5.87 5.04 6.75 0.43 Sphericity % 100 0.74 0.67 0.82 0.04 Surface area mm2 100 180.32 163.01 200.43 3.41 Rmin mm 100 5.87 5.04 6.75 0.43 Rmax mm 100 7.70 6.38 9.26 0.60 Aspect ratio % 100 0.90 0.78 1.13 0.07 Angle of repose Degrees 5 36.4 34.5 38.9 2.4 GMD mm 100 9.67 8.08 11.45 0.71 Bulk density g/cm3 5 0.35 0.312 0.403 0.251 True Density g/cm3 5 1.91 0.92 2.05 0.61 Volume cm3 10 3.788 2.413 4.391 0.895 Porosity % 10 82.1 73.4 85.6 2.43 Coefficient of static friction on plywood - 3 0.532 0.5095 0.7813 0.03 Coefficient of static friction on plastic - 3 0.728 0.6750 0.7536 0.01

Table 1: Some physical properties of Ngologolo fruit