medium

The intensity and hence, the loudness increases with the density of the medium in which sound travels. It has been observed that more effort is to be made to make oneself heard by another in aeroplanes or balloons, while flying at high altitudes as the density of air is les..

Interaction between the solvent molecules. The solvent-solvent interaction also lowers the mobility. More the viscosity less is the mobilit..

Refraction of Light - Light not only bounces off surface it goes through some of them often slowing down and changing direction in the process called refraction. It occurs at the point where light travels from one medium to another of different density. Refraction produces mirages and rai..

Depending upon the nature of the reducing agent, nitrobenzene forms different products. ..

Wave Motion and Sound..

Now the velocity of the observer is opposite to the velocity of sound, while that of the source is the same as that of sound. 'b' is to be replaced by -b in equation (1-38)..

The below table lists various types of colloids with various example..

Considering the direction of the velocity of sound reaching the observer as positive, a is negative and b is positive. Then The apparent frequency is less than the actual frequenc..

Colloidal systems, depending on the nature of attraction between the dispersed phase and the dispersion medium are classified into lyophobic (solvent hating) and lyophilic (solvent loving). If water is the dispersion phase is water, then the colloids are either hydrophilic or hydrophobic..