How do you calculate specific surface energy?
The most common way to measure surface energy is through contact angle experiments. In this method, the contact angle of the surface is measured with several liquids, usually water and diiodomethane. Based on the contact angle results and knowing the surface tension of the liquids, the surface energy can be calculated.
What does modulus of elasticity depend on?
The Young’s Modulus of a material is a fundamental property of every material that cannot be changed. It is dependent upon temperature and pressure however. The Young’s Modulus (or Elastic Modulus) is in essence the stiffness of a material. In other words, it is how easily it is bended or stretched.
What is the difference between Young’s modulus and modulus of elasticity?
1 Elastic modulus (Young’s modulus or modulus of elasticity) Young’s modulus describes the relative stiffness of a material, which is measured by the slope of elastic of a stress and strain graph. A constant of proportionality will result, which is known as the modulus of elasticity, or Young’s modulus (E).
What is surface energy obtain its formula?
Surface energy = Energy × [Area]-1. Or, E = [M1 L2 T-2] × [M0 L2 T0]-1 = [M1 L0 T-2]. Therefore, the surface energy is dimensionally represented as [M1 L0 T-2].
How do you calculate surface tension from surface energy?
Work done by the excess pressure is stored in the form of potential energy. = surface tension × increase in surface area.
What is the value of modulus of elasticity?
Sometimes referred to as the modulus of elasticity, Young’s modulus is equal to the longitudinal stress divided by the strain. Stress and strain may be described as follows in the case of a metal bar under tension. Young’s modulus = stress/strain = (FL0)/A(Ln − L0).
What is modulus of elasticity What is its unit?
The units of modulus of elasticity are pressure units, as it is defined as stress (pressure units) divided by strain (dimensionless). Most commonly the units are Pascals (Pa) which is the SI unit, or pounds per square inch (psi) depending on the industry or geographical location.
Is modulus of elasticity the same as modulus of rigidity?
The main difference between modulus of elasticity and modulus of rigidity is that the modulus of elasticity describes how a material gets deformed when a force is applied at right angles to a surface of an object, causing the material to elongate or shorten while the modulus of rigidity describes how a material gets …
What is the relation between modulus of elasticity and modulus of rigidity?
Where, K is the Bulk modulus. G is shear modulus or modulus of rigidity….Elastic constant formula.
| Formula | SI Units | |
|---|---|---|
| The relation between modulus of elasticity and modulus of rigidity | E=2G(1+μ) | N/m2 or pascal(Pa) |
| The relation between Young’s modulus and bulk modulus | E=3K(1−2μ) | N/m2 or pascal(Pa) |
What is surface 11th energy?
Surface energy is the excess energy exhibited by the liquid molecules on the surface compared to those inside the liquid. This means liquid molecules at the surface have greater energy as compared to molecules inside it.
What is surface energy find the relation between surface tension and surface energy?
This work done in stretching the film is stored in the area dA in the form of potential energy (surface energy). ∴ Surface energy, E = T dA. ∴ Hence, surface tension = surface energy per unit area.