## A relation connecting the derivatives of physical quantities |

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0.3 per cent Acad afforded arguments ball bearing Buckingham cgs units change in Q0 class belong coefficients constant Constant-Product contain coordinates curvature with respect curve denote density derivative desired relation diameter differentiating dimensionless products dimensions discussed effect of gravity empirical equation Engs equation 27 Equations 28 example experimentally exponents find a relation fixed formulas Friction funct fundamental units needed furnished gives hence identity II-theorem ILLUSTRATIVE independent involve Journal Wash length liquid machine Mech method number of fundamental numerical value observations obtained occurs particular physical possible to find predict present paper pressure primitive equation problem Q0 with Q Qu and Q2 readily relation connecting required to calculate respect to Qx restriction result roll-time Rolling-Ball shape shown simultaneously slope solved steel sufficient surface THEORETICAL three quantities Q0 tive Trans treated tube Vary viscosimeter viscosity Washington