Category: Pure Sciences

Characteristics of life

Science > Biology > General Biology > Introduction to Biology > Characteristics of life Biology is a branch of science which studies living beings that all plants and animals including humans. Biology examines the structure, function, growth, origin, evolution, and distribution of living things. It classifies and describes organisms, their functions, how species come into existence, and […]

Human Biology

Alimentary Canal: Brief Idea

Post author By Hemant More
Post date November 25, 2019
3 Comments on Alimentary Canal: Brief Idea

Science > Biology > Digestion and absorption in Human > Alimentary Canal: Brief Idea The digestive system in humans consists of an alimentary canal and associated digestive glands. The human alimentary canal (aliment: nourish) is a continuous muscular digestive tube about 8 to 10 m long that runs through the body. It is open at two ends […]

Physics

Concept of Strain Energy

Science > Physics > Elasticity > Concept of Strain Energy In this article, we shall study, work done in stretching wire and the concept of strain energy. Work done in Stretching a Wire: Consider a wire of length ‘L’ and area of cross-section ‘A’ be fixed at one end and stretched by suspending a load […]

Tags Area under shear, Breaking point, Breaking stress, Brittle material, Bulk modulus of elasticity, Change in length, Change in shape, Change in volume, Compression, Compressive strain, Compressive stress, Deformation, deforming force, Ductile material, Elastic Limit, Elastic material, Elasticity, Extension in wire, Hooke's law, Increasing load, Longitudinal strain, Longitudinal stress, Modulus of elasticity, Modulus of rigidity, Permanent set, Plastic material, Plasticity, Poisson's ratio, Proportionality limit, Rigid material, Rigidity, Searle's apparatus, Searle's Experiment, Shear strain, Shear stress, Shearing force, Strain, Strain energy, Strain energy per unit volume, Stress, Stress Strain Curve, Tensile strain, Tensile stress, Tension, Ultimate stress, Volumetric strain, Volumetric stress, yielding of wire, yielding point, yielding stress, Young's modulus of elasticity

Physics

Change in Surface Energy

Science > Physics > Surface Tension >Change in Surface Energy In this article. we shall study numerical problems on the change in surface energy due to breaking of drop or coalescence of number of drops into a one drop. Example – 01: Two mercury drops one of radius 2 mm and the other of radius […]

Tags Adhesion, Adhesive force, Cohesion, Cohesive force, Range of molecular attraction, Sphere of molecular influence, Surface Energy, Surface tension

Physics

Numerical Problems on Surface Tension

Post author By Hemant More
Post date November 22, 2019
3 Comments on Numerical Problems on Surface Tension

In this article, we shall study numerical problems to find surface tension of liquid. Science > Physics > Surface Tension > Numerical Problems on Surface Tension Example – 1: A needle 5 cm long can just rest on the surface of the water without wetting. What is its weight? Surface tension of water = 0.07 […]

Tags Adhesion, Adhesive force, Cohesion, Cohesive force, Range of molecular attraction, Sphere of molecular influence, Surface tension

Physics

Concept of Surface Energy

Science > Physics > Surface Tension > Concept of Surface Energy In this article, we shall study the concept of surface energy, relation between the surface energy and surface tension. A molecule on the surface of a liquid experiences a downward pull due to surface tension. If a molecule deep inside the liquid is to […]

Tags Adhesion, Adhesive force, Cohesion, Cohesive force, Range of molecular attraction, Sphere of molecular influence, Surface Energy, Surface tension

Physics

Surface Tension in Everyday Life

Post author By Hemant More
Post date November 22, 2019
No Comments on Surface Tension in Everyday Life

Science > Physics > Surface Tension > Surface Tension in Everyday Life In this article, we shall study different phenomena due to surface film formed on the liquid surface due to surface tension. Examples of Surface Tension (Due to formation of the surface film): When a glass rod is dipped in water and taken out […]

Tags Adhesion, Adhesive force, Cohesion, Cohesive force, Range of molecular attraction, Sphere of molecular influence, Surface tension

Physics

Surface Tension

Science > Physics > Surface Tension > Surface Tension In this article, we shall study the concept of the surface tension, its characteristics and the factors affecting it. Intermolecular Forces: Between any two molecules, there exists a force of attraction. This force is called the intermolecular force. These intermolecular forces of attraction are of two […]

Tags Adhesion, Adhesive force, Cohesion, Cohesive force, Range of molecular attraction, Sphere of molecular influence, Surface tension

Physics

Angle of Contact

Science > Physics > Surface Tension > Angle of Contact When water is taken in a glass vessel, the free surface of the water near the walls is curved concave upward. If mercury is taken in a glass vessel, the free surface of mercury near the walls is convex upwards. When the liquid is in […]

Tags Adhesion, Adhesive force, Angle of contact, Cohesion, Cohesive force, Concave meniscus, Convex meniscus, Range of molecular attraction, Sphere of molecular influence, Surface Energy, Surface tension

Physics

Laplace’s Law of Spherical Membrane

Post author By Hemant More
Post date November 21, 2019
3 Comments on Laplace’s Law of Spherical Membrane

Science > Physics > Surface Tension > Laplace’s Law of Spherical Membrane In this article, we shall study Laplace’s Law about the excess of pressure inside a drop or a bubble of a liquid. Excess of Pressure Inside a Drop of a Liquid and Soap Bubble: Due to surface tension, free liquid drops and bubbles […]

Tags Adhesion, Adhesive force, Angle of contact, Cohesion, Cohesive force, Concave meniscus, Convex meniscus, Liquid drop, Range of molecular attraction, Soap bubble, Sphere of molecular influence, Spherical membrane, Surface Energy, Surface tension