What is the SI unit of respectability?
Magnetic susceptibility indicates the degree of magnetization of a material in response to an applied magnetic field. It is given as: χ=HM. Since both numerator and denominator have units A/m, susceptibility itself is a dimensionless quantity.
Why magnetic susceptibility has no unit?
Magnetic susceptibility( χ ) is the measure of the material to be magnetised. Therefore χ is the dimensionless quantity. The electrons in a diamagnetic material rearrange their orbits slightly creating small persistent currents which oppose the external magnetic field.
What are the methods of measuring surface tension?
There are three main methods used to measure equilibrium surface and interfacial tensions. Two of the methods are based on force tensiometer; Du Noüy ring and, Wilhelmy plate, while the third is an optical method; pendant drop.
What are the method of reducing surface tension?
Some liquids such as oil and kerosene can destroy surface tension in water. Adding soap or detergent reduces surface tension in water. Increasing the temperature of the liquid reduces surface tension.
What happens if surface tension decreases?
Washing with cold water: The major reason for using hot water for washing is that its surface tension is lower and it is a better wetting agent. But if the detergent lowers the surface tension, the heating may be unnecessary. Surface tension and droplets: Surface tension is responsible for the shape of liquid droplets.
What would happen if water has weak surface tension?
What do you predict would happen if water had weak surface tension? Insects would not be able to land on or walk on water.
How does surface tension depend on temperature?
The strength of surface tension depends on intermolecular forces. As temperature increases, molecules of liquid become more active and they move more rapidly; therefore, the intermolecular forces are more instable. Surface tension decreases with increasing temperature.
What causes surface tension in liquids?
The surface tension of a liquid results from an imbalance of intermolecular attractive forces, the cohesive forces between molecules: A molecule in the bulk liquid experiences cohesive forces with other molecules in all directions. A molecule at the surface of a liquid experiences only net inward cohesive forces.
In what way you can reduce the surface tension of polar liquids?
Surfactants are molecules, such as soaps and detergents, that reduce the surface tension of polar liquids like water. Capillary action is the phenomenon in which liquids rise up into a narrow tube called a capillary.
What is P in surface tension?
Surface tension = (surface force)/ (length force acts) γ = F /d. Over here: Γ refers to the Surface tension. F is the force which applies to the liquid.
Does surface tension and force have same dimensions?
a) Tension and surface tension. Since tension is a type of force, it will also have the same dimensional formula as the dimensional formula of force i.e. [MLT-2].