The density, viscosity and ultrasonic velocity have been measured for ternary mixture of Methanol+Ethanol+Benzene of fixed equal volumes of the components at temperatures of 303.15 K, 308.15 K, 313.15 K, 318.15 K, 323.15 K and 328.15 K. The experimental data have been used to calculate some acoustic and thermodynamic parameters: adiabatic compressibility, free length, free volume, and internal pressure. It was observed that adiabatic compressibility (β), free length (L f ), and free volume (V f ), increased with increase in temperature, whereas internal pressure (πi ) decreased with increase in temperature. Some probable reasons for the increase or decrease of acoustic and thermodynamic parameters with temperature change are presented.

A new physical model of the appearance of light, properties, and its trajectory. Explains the paradox of invariance and isotropy of light based on the laws of classical physics.