Non-Renewable Energy | Sources, Advantages, Disadvantages

What is non-renewable energy? Non-renewable energy is a type of energy whose sources can not be replenished in our lifetime (or in many lifetimes). All fossil fuels are non-renewable, but not all non-renewable energy sources are fossil fuels Coal, crude oil, and natural gas are all considered fossil fuels because they were formed from the… Read More »

Toughness | Definition | Measuring Tests [Brief Explanation]

What is Toughness? Toughness is the ability of a material to absorb energy before ultimate failure. Material which can absorb more energy before failure is considered more tough than another material which can absorb less energy. Unit of toughness is Joules per cubic meter. Tests for measuring toughness There are mainly two tests which are… Read More »

Hardness | Definition | Measuring Tests [Brief Explanation]

What is hardness? Hardness is the property of a material to resist surface indentation (and scratches). Some materials are harder than other materials. For example, metals are harder than plastics, wood etc. Difference between hardness and toughness Hardness is a property which is related to the surface of a material while toughness is a property… Read More »

Laws of Thermodynamics: A Brief Explanation [Definition]

Laws of thermodynamics Like every other science, thermodynamics is also governed by certain laws. There are basically four laws which are base of thermodynamics. These laws are Zeroth law of thermodynamics First law of thermodynamics Second law of thermodynamics Third law of thermodynamics Now let us discuss each of them one by one. Zeroth law… Read More »

Pressure | Types | Classification of Measurement Devices

Definition of pressure Pressure is defined as normal force exerted by a fluid on per unit area. Counterpart of pressure in solids is normal stress. SI unit of pressure is pascal (Pa). 1 Pa = 1 N/m2 Where: N is newton m is meter Units of pressure Pa Bar At Atm Torr Psi Types of… Read More »

Thermodynamic System and Surrounding | Boundary | Types

What is a thermodynamic system? A thermodynamic system is an area (or volume) in space upon which study is concentrated. Everything outside the system is called surrounding. A system is separated from the surrounding with the help of a boundary. A boundary has zero thickness so it does not contain any matter. Types of boundaries… Read More »

Fluid Mechanics | Definition, Types, Applications [Brief Explanation]

What is fluid mechanics? Before understanding fluid mechanics let us first understand ‘mechanics’. Mechanics is a physical science which deals with the bodies which are either moving or stationary, under the influence of some external force. Image attributions: By ME420PSU – PowerpointPreviously published: no, CC BY-SA 3.0, Mechanics can be further divided into two parts… Read More »

Pump | Definition, Types, Applications [A Brief Guide]

What is a pump? A pump is a mechanical device which is used to move fluid (sometimes also slurry) from one place to another. One of the examples of a pump is the water pump which is used in our houses to carry water from the ground to the tank on the top of house.… Read More »

Surface Tension | Definition, Formula, Examples, Capillary Effect

What is surface tension? Surface tension (or ST) is a property of fluid which is responsible for the formation of enclosed surfaces. For example, Mercury droplets are near spherical (and can also be rolled very easily) and water drops hanging from a tree branch are also near spherical. It is the property which is responsible… Read More »

Types of Fluid Flow | A Brief Guide with Comparison

Types of fluid flow On the basis of different flow conditions, fluid flow can be classified into various types. Viscous and inviscid flow One the basis of viscosity of fluid (in flow) we can classify fluid flows into two types. Viscous Inviscid (Non-Viscous) In viscous flow, the resistance provided by viscosity is considerable. In Inviscid… Read More »