Based on so far experiences, the solution model was used to simulation the physical properties. Firstly it was concentrated on density, later on viscosity. Each of them play significant role in developing a new materials and technology. Knowledge of the density of liquid metals and alloys is crucial in most theories related to the liquid state and the simulation of the contraction that occurs during solidification. There are several methods for measuring the density of liquid metals: pycnometer, maximum-bubble, etc. While, the viscosity is one of the most important transport properties of molten metals. It is related to the internal friction within the liquid and provides some information about the structure of the materials. However, a new experimental method of Roach-Henein enable to simultaneous the determination of three physical properties, namely density, viscosity and surface tension. This new formulation allow to predict flow rate of a stream draining from an orifice under the influence of gravity. Studies was focused on Ag-based liquid alloy.