Convection. When a fluid, such as air or a liquid, is heated and moved away from the source, the particles of the air or liquid absorbs heat. Particles of hot surface expands, becomes less dense, and rises. Such type of heat transfer is called convection. This mechanism is used ... Read More

For representing any irrational number nsqrt{n}n​ on the number line , the representation of n−1sqrt{n-1}n−1​ can be used.To represent 5sqrt{5}5​, use the representation of  5−1=4=2sqrt{5-1} =sqrt{4} =25−1​=4​=2. Draw a perpendicular AB of length 1 unit at A=2 and join OB. OB=22+12=4+1=5=sqrt{2^{2} +1^{2}} =sqrt{4+1} =sqrt{5}=22+12​=4+1​=5​ Using compass and radius as length ... Read More

Petrochemical is a large group of chemicals that are derived from petroleum and natural gas and used in various commercial purposes. Petrochemicals include the complete range of aliphatic, aromatic, and naphthenic organic chemicals, and inorganic materials as sulphur and ammonia.

Kerosene, also known as paraffin, lamp oil, and coal oil (an obsolete term), is a combustible hydrocarbon liquid which is derived from petroleum. It is widely used as a fuel in aviation as well as households. Petroleum: Petroleum is a dark coloured, thick crude oil found deep below the ground ... Read More

An atom is the basic building block of an element and a compound. All the matter in the universe is made of tiny particles known as atoms. In nature, 92 different kinds of atoms are present. These atoms combine with one another to form different kinds of matter. For ... Read More

Initially, the zero as a number was not available. There was the idea of empty space, which may be thought conceptually similar to zero. Babylonians around 700 BC uses three hooks to denote an empty place in the positional notation.Almost during the same time, Greek mathematicians made some unique contributions ... Read More

When we melt ice, it is a physical change because we only add energy. We added enough energy to create a phase change from solid to liquid. No chemical changes take place when we melt the ice. The water molecules are still water molecules.Physical actions, such as changing temperature or pressure, ... Read More

An acid is a molecule or substance that has a pH value of less than 7.0 when it is present in an aqueous solution. Formic acid (HCOOH) is the simplest carboxylic acid, containing a single carbon. It is a colourless and fuming liquid. It has a pungent odour. It can ... Read More

To convert a Decimal to a Fraction follow these steps:Step 1: Write down the decimal divided by 1.Step 2: Multiply both top and bottom by 10 for every number after the decimal point. (For example, if there are two numbers after the decimal point, then use 100, if there are ... Read More

“Thomas Alva Edison” the renowned American inventor and businessman who has been described as America's greatest inventor, invented the first ‘Light Bulb’ in October 1879.